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Small home rewire, looking for some input

Lil'John

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Aug 11, 2013
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73
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Placerville, California
I purchased an older house(1950ish) and now I plan to address some of the electrical issues :shocking: For reference, this will be in California, ~700 square foot, and a total of 16 outlets that aren't switched. The house has no central heat/air :(

One issue will be replacing the electric panel (old 100 amp Zinzco) with something larger (200 amp) and not a fire hazard. I plan to have an electrician handle this for me. Is there a recommended surface mounted panel?

Another issue is I believe I want to have a whole house surge protector installed with the new panel. Are there any I should stay away from?

The other issue is most of the plugs in the house are not grounded and I'm not certain the wire itself is trust worthy.

My understanding is I want the fridge and microwave on separate 20 amp circuits/breakers. Each of these would be 10/2 wiring. Is this correct?

I have read that each plug should be on a separate circuit/breaker in an ideal situation. Is this correct? And do electric panels have that many open breakers? It seems like even my small house would take up 30+ breakers once light switches are accounted for :eyecrazy:

Is there are reason not to have all the wiring, breakers and outlets be 20 amp? I understand that the wire, plugs, and breakers will cost a bit more but is there a downside to this? If I do this, would I be correct in using 10/2 wiring?

If the above is not the route to go, is there a downside to using the heavier 10/2 wiring with 15 amp outlets and breakers?

Last item is I have a detached garage that I'd like to split the 200 amp service to feed. The detached garage has a washer and drier in it currently. It will be getting a welder, air compressor, and other fab worthy equipment. If I split 100 amp off for the garage, will the 100 amp left for the house be sufficient?

Thanks in advance and sorry if some of these are newbie type questions.
 
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pattenp

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20A outlet circuits use 12-2. I don't think you need a full 100A to the garage. Sorry for the short reply, I am getting ready to leave and just saw your post. Other will be along shortly.
 

2ManyProjects

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I purchased an older house(1950ish) and now I plan to address some of the electrical issues :shocking: For reference, this will be in California, ~700 square foot, and a total of 16 outlets that aren't switched. The house has no central heat/air :(

Are you planning to change that? If so, how?

The other issue is most of the plugs in the house are not grounded and I'm not certain the wire itself is trust worthy.

Do you have anything tangible to base that suspicion on, or is just a matter of the age of the building?

My understanding is I want the fridge and microwave on separate 20 amp circuits/breakers. Each of these would be 10/2 wiring. Is this correct?

You want them on separate circuits; and at least in the case of the microwave, this SHOULD be a dedicated circuit (i.e., no other loads on it); not sure about the 'fridge, but I don't think a dedicated circuit is actually required for that (possibly a good idea, tho'). In any event, AFAIK, standard 15A breakers are quite adequate for both applications, unless the devices themselves have exceptionally high power requirements. Finally, depending on the length of the wire run, you MIGHT want to upsize the wiring itself a bit to ameliorate voltage drop; but in a house that small, this is not likely to be a huge problem.

I have read that each plug should be on a separate circuit/breaker in an ideal situation. Is this correct?

If you're talking about general-purpose duplex outlets and lighting circuits around the house, no. While using "Home Run" wiring for everything can be useful IF you are going to implement certain types of home automation, it is certainly NOT required by code; nor is it even close to standard practice. Only certain specific devices (such as that microwave oven discussed above) REQUIRE dedicated circuits.

And do electric panels have that many open breakers? It seems like even my small house would take up 30+ breakers once light switches are accounted for :eyecrazy:

Depends on the panel. Typical "200A" panels have up to 40 branch breaker slots; but note that for some circuits (i.e., those feeding 240V as opposed to 120V), you'll use them two at a time.

That said, I think your breaker count is off. I can't imagine a "normal" house that small needing anything like that many breakers. One of my homes is about 1,800 ft.^2, plus a finished basement, plus an attached two-car garage. It has a 150A panel with 28 branch breaker slots, of which only 21 are in use. It is more than adequate, at least for now (tho' it just MIGHT start to become slightly marginal when I get around to re-doing my garage).

Is there are reason not to have all the wiring, breakers and outlets be 20 amp? I understand that the wire, plugs, and breakers will cost a bit more but is there a downside to this?

Only the cost, really. But again, unless it is some sort of special-purpose circuit, a 15A breaker (and outlet) will prove quite adequate. If you really want to keep all the general-purpose circuits very lightly loaded, the generally better approach is simply to use more circuits, with fewer loads on each one. That said, at my shore home, I did run a dedicated 20A circuit to the wall behind the entertainment center in the Living Room, where it terminated in one dual gang box with two 20A duplexes (four outlets total); and I intend to do the same thing at my main residence when the opportunity presents itself. This was done in part to allow for some REALLY serious audio amplifiers; but more so to reduce the impedance of that circuit for tighter coupling to the power grid and reduced potential for induced noise.

If I do this, would I be correct in using 10/2 wiring?

12/2 (with Ground) is considered "S.O.P." for 20A circuits, unless the wiring run is unusually long.

If the above is not the route to go, is there a downside to using the heavier 10/2 wiring with 15 amp outlets and breakers?

That would be TWO steps over "normal", and gross overkill IMCO. If you want to use 12/2 in place of 14/2 for your run-of-the-mill 15A lighting and convenience-outlet circuits, be my guest -- I would near-certainly do likewise, just because the marginal cost is so trivial. But when you step up to 10/2, things get significantly more expensive, and there's no real benefit to be had on such light-duty circuits. Also, depending on the specific devices (duplex outlets, wall switches, etc,) you use, you just MIGHT have a hard time fitting AWG 10 wires onto their connection terminals.

Last item is I have a detached garage that I'd like to split the 200 amp service to feed. The detached garage has a washer and drier in it currently. It will be getting a welder, air compressor, and other fab worthy equipment. If I split 100 amp off for the garage, will the 100 amp left for the house be sufficient?

For only 700 ft.^2? Unless you're going way overboard on the "stuff" in that house, 100A should be much more than adequate.

For that matter, you PROBABLY don't even need 100A in the garage. But OTOH, using AL 2-2-2-4 MHF to feed the sub-panel (which you WILL need, because the garage is detached) will support up to 90A (depending on the run length), and is sufficiently cost-effective that it is probably your best bet, as opposed to skimping further (say, to 60A) on the garage feed.

Thanks in advance and sorry if some of these are newbie type questions.

No problem. As the saying goes, the only stupid question is the one that doesn't get asked.

One other tip, as you're planning things out... Every room in the house should be served by AT LEAST two separate circuits/breakers, preferably on opposite phases (tho' this part is relatively unimportant in most cases), even if those circuits ALSO serve parts of other rooms. The idea here is, if/when a breaker pops (or you need to manually throw it in order to work on something), you'll still have SOME power in that room, for lighting, power tools, etc.

 
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Lil'John

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Placerville, California
Thanks all for the correction on the wiring gauge. I'm not sure why I got dyslexic on the table with sizes and latched on 10 gauge :eyecrazy:

Are you planning to change that? If so, how?
With regards to central heat/air, I don't intend to change it in the near future(5 years) but may re-evaluate after a summer or two. The attic and crawl space are accessible so I see it as an "easy" add.

Do you have anything tangible to base that suspicion on, or is just a matter of the age of the building?
Part of my evaluation is based upon the exposed wiring in the detached garage. It is a rats nest. I am also a little worried about the age/quality of the existing wire under the house.

As noted, most of the plugs are ungrounded. I'm not sure if any of the wire has the ground wire in it.

I don't mind spending ~$200-$300 on material to make the house safer.

You want them on separate circuits; and at least in the case of the microwave, this SHOULD be a dedicated circuit (i.e., no other loads on it); not sure about the 'fridge, but I don't think a dedicated circuit is actually required for that (possibly a good idea, tho'). In any event, AFAIK, standard 15A breakers are quite adequate for both applications, unless the devices themselves have exceptionally high power requirements. Finally, depending on the length of the wire run, you MIGHT want to upsize the wiring itself a bit to ameliorate voltage drop; but in a house that small, this is not likely to be a huge problem.
If you're talking about general-purpose duplex outlets and lighting circuits around the house, no. While using "Home Run" wiring for everything can be useful IF you are going to implement certain types of home automation, it is certainly NOT required by code; nor is it even close to standard practice. Only certain specific devices (such as that microwave oven discussed above) REQUIRE dedicated circuits.

So in theory, except for things like microwaves that should be on a dedicated circuit, I shouldn't have a problem doing two 15A dedicated circuits per room on different phases. The wire itself can be 12/2.

Depends on the panel. Typical "200A" panels have up to 40 branch breaker slots; but note that for some circuits (i.e., those feeding 240V as opposed to 120V), you'll use them two at a time.
That said, I think your breaker count is off. I can't imagine a "normal" house that small needing anything like that many breakers. One of my homes is about 1,800 ft.^2, plus a finished basement, plus an attached two-car garage. It has a 150A panel with 28 branch breaker slots, of which only 21 are in use. It is more than adequate, at least for now (tho' it just MIGHT start to become slightly marginal when I get around to re-doing my garage).

If I do not need an individual breaker for each outlet, I would agree that my count is fairly off. I counted out 16 outlets in the house. Five are in one bedroom, three are in the kitchen(add two more for fridge and microwave), one in bathroom, five in living room, and two in second bedroom.

The first bedroom with five outlets will have a couple of computers running in there so my intention is to have at least one 20 amp group in there and possibly two.

Only the cost, really. But again, unless it is some sort of special-purpose circuit, a 15A breaker (and outlet) will prove quite adequate. If you really want to keep all the general-purpose circuits very lightly loaded, the generally better approach is simply to use more circuits, with fewer loads on each one. That said, at my shore home, I did run a dedicated 20A circuit to the wall behind the entertainment center in the Living Room, where it terminated in one dual gang box with two 20A duplexes (four outlets total); and I intend to do the same thing at my main residence when the opportunity presents itself. This was done in part to allow for some REALLY serious audio amplifiers; but more so to reduce the impedance of that circuit for tighter coupling to the power grid and reduced potential for induced noise.

The main reason I'm looking at a single wire size is to ease buying/pulling wire... easier to not have to remember if I did 12 or 14gauge ;) Only one room is going to be "heavily" stressed. Everything else is mainly lighting.

12/2 (with Ground) is considered "S.O.P." for 20A circuits, unless the wiring run is unusually long.

The panel is on one end of the house with the "master" bedroom on the other ~40 feet away. The kitchen and "office" room are within 10 feet of the panel.

For only 700 ft.^2? Unless you're going way overboard on the "stuff" in that house, 100A should be much more than adequate.

That is kind of what I thought. But I'd rather have someone else's input on it.

For that matter, you PROBABLY don't even need 100A in the garage. But OTOH, using AL 2-2-2-4 MHF to feed the sub-panel (which you WILL need, because the garage is detached) will support up to 90A (depending on the run length), and is sufficiently cost-effective that it is probably your best bet, as opposed to skimping further (say, to 60A) on the garage feed.

The garage is something I'm concerned over because of all the bonus equipment such as welder, air compressor, etc in addition to a clothes washer and drier. Granted, with the tools, I would probably only be hitting them two at a time(air compressor and something)

Currently, the garage is "only" 20'x14'. I am intending to widen it to 20'x26' in the very near future (1-2 years) so I am considering more electrical tools :p
 

sands35

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Kitchen NEC requirements (as well as bathrooms) are pretty well documented on the web. There are specific amp capacity, GFCI and breaker requirements that need to be followed.

example:
http://www.eminnetonka.com/community_development/permits/documents/electrical_requirements.pdf

or:
http://www.nojolt.com/residential_electrical_wiring_rough_in_guide.shtml

You will want to check with your local code authority. They may have something similar.

IMHO - aside the documented info above, run one breaker per appliance in the kitchen. That way you can kill that appliance alone and not the others. If you ever want to set up a gen set, it gets simpler. i.e., only power the fridge, not the DW or disposal off the genny.

I'd plan on $2-3K rather than $2-300. You are going to spend a couple of grand just on wire if you want to re-wire the whole house.

Personally, I find that 2 prong plugs are just fine for anything other than kitchens, bathrooms and any TV / AV center. No real reason to change them. If it makes you feel better, install one 3 prong grounded plug in each bedroom where it makes sense, a grounded double duplex near a logical TV or computer location and get the kitchen and bathroom up to code.

A 60 amp sub panel will be just fine the in garage for any one man workshop. I'd only worry about it if I was running a high amp welder, plasma or compressor. Just put it where you won't knock down the wall. Then run metal conduit for outlets and lights - provided you can't get above in a crawl space. (it's a garage, no need to go into drywall and deal with that mess for a utility area)
 
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2ManyProjects

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With regards to central heat/air, I don't intend to change it in the near future(5 years) but may re-evaluate after a summer or two. The attic and crawl space are accessible so I see it as an "easy" add.

All well and good. But NOW is the time to make sure that whatever electrical upgrades you do ill also be adequate to support that, when the time comes.

Part of my evaluation is based upon the exposed wiring in the detached garage. It is a rats nest. I am also a little worried about the age/quality of the existing wire under the house.

As noted, most of the plugs are ungrounded. I'm not sure if any of the wire has the ground wire in it.

In which case, and assuming this is a single-level house where everything is relatively easy to get at, you may well be on the right track to just start over from scratch. It will be more work, of course; but if you do it right, it will produce a much nicer result which you can have confidence in for a long time.

I don't mind spending ~$200-$300 on material to make the house safer.

I haven't worked up a BoM or anything; but that figure sounds VERY optimistic to me, especially if you are replacing not only the branch wiring, but also the main service panel and all the breakers. As I said, I don't really have a good handle on what it "should" cost; but I would not be surprised at, say, a 5:1 ratio -- and far more if you bring in a pro for ANYTHING.

So in theory, except for things like microwaves that should be on a dedicated circuit, I shouldn't have a problem doing two 15A dedicated circuits per room on different phases.

They don't even need to be "dedicated", even in the sense you are (mis-)using that term.

The wire itself can be 12/2.

Sure.

If I do not need an individual breaker for each outlet, I would agree that my count is fairly off. I counted out 16 outlets in the house. Five are in one bedroom, three are in the kitchen(add two more for fridge and microwave), one in bathroom, five in living room, and two in second bedroom.

As long as the bedrooms are just bedrooms (and not dual-purpose rooms which might also become a "Home Office" or "Media Room" or similar), two 15A circuits should easily handle all of them.

The first bedroom with five outlets will have a couple of computers running in there so my intention is to have at least one 20 amp group in there and possibly two.

You're still going down Overkill Road.

Contrary to popular belief in some quarters, computers generally don't really draw all that much power. Some folks who home-brew so-called "Gaming Rigs" go off the deep end with grossly over-rated power supplies; but in at least most cases, that's more advertising hype and "voodoo engineering" than reality. For example, I'm currently running an EIGHT-core AMD "Black Edition" with 16GB of memory AND a decent LCD monitor off an APC "SmartUPS 1400" (chosen because it will soon be supporting several additional devices, and I wanted a lot of run time from the batteries); and notably, that SmartUPS is not even lighting up the first LED on is load meter (which would imply less than 280 VA, or about 2.25A total, for the system and the monitor).

Now, if you have a really serious laser printer that was built more than maybe ten years ago (say, a Laserjet 8100dtn or similar), then you WILL draw some significant juice out of the wall; but even then, only for brief periods when it is going through certain parts of its warm-up/print cycle. And it would still be fine on a standard 15A circuit, as long as that circuit did not have any other really heavy loads on it.

The main reason I'm looking at a single wire size is to ease buying/pulling wire... easier to not have to remember if I did 12 or 14gauge ;)

That's fine; and I really don't want to be arguing against moderately upsizing the wiring. But FWIW, the outer jackets on at least most modern NM-B (a.k.a. "Romex") cables are color-coded by AWG, so they're quite easy to tell apart at a glance.

Only one room is going to be "heavily" stressed. Everything else is mainly lighting.

And as I pointed out above, even that one room is NOT really all that "heavily" stressed. If you want to run a dedicated circuit for the computer workstation, fine; it won't hurt anything. But trust me, 15A will be more than adequate.

The panel is on one end of the house with the "master" bedroom on the other ~40 feet away. The kitchen and "office" room are within 10 feet of the panel.

Those distances are FAR too short for voltage drop to be a practical issue, as long as you don't loop the wire around the outside of the house twice en route to its destination! ;)

The garage is something I'm concerned over because of all the bonus equipment such as welder, air compressor, etc in addition to a clothes washer and drier. Granted, with the tools, I would probably only be hitting them two at a time(air compressor and something)

Currently, the garage is "only" 20'x14'. I am intending to widen it to 20'x26' in the very near future (1-2 years) so I am considering more electrical tools :p

Even so, the 90A you can get out of that 2-2-2-4 MHF will surely be more than sufficient.

 

2ManyProjects

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If I do not need an individual breaker for each outlet, I would agree that my count is fairly off. I counted out 16 outlets in the house. Five are in one bedroom, three are in the kitchen(add two more for fridge and microwave), one in bathroom, five in living room, and two in second bedroom.

I forgot to mention...

If I recall correctly, the NEC (and hence, at least most local jurisdictions) requires at least two GFCI-protected circuits (not just two outlets, two CIRCUITS) to service any run of Kitchen countertop of at least two feet in length, and every five feet after that. You didn't describe your kitchen in any detail; but in a 700 ft.^2 house, I can't imagine it is all that huge or elaborate. Even so, you WILL need at least two circuits to supply those outlets; and while I'm not certain this is required by code, they really ought to be 20A capacity, due to the possibility of having more than one countertop gadget (toaster, coffeepot, blender, mixer, food processor, breadmaker, etc.) running at the same time. You'll also need a circuit for the MW, plus at least one more (maybe two) for the dishwasher & disposal (if this is a 20A circuit, I think they can share it).

Finally, while I still don't think the refrigerator REQUIRES a dedicated circuit, it probably ought not tacked be on to those appliance-outlet circuits, either. There's actually a school of thought which states that the refer should NOT be on a dedicated circuit; but rather, it should share a circuit with some minor (but frequently used) lighting load, so it will be more obvious if/when the breaker trips (i.e., the non-working light will prompt you to investigate BEFORE your food goes bad). This is less of a practical problem these days, assuming a modern electronically controlled refrigerator which has a "display panel" of some sort which by default is always lit up like a Christmas tree; the dead display will (hopefully) be noticeable enough to prompt you into action.

 
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Lil'John

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Thank you again for all the input.

My "$200 to $300" number is just wire and outlets. It does not include any panels or related. $300 may be just a hair low but from what I've seen 250 feet of 12/2 wire is ~$150. A bulk of the wiring is within 10 feet of the panel.

My main concentration is on outlets only at this time. I will look into the four fixed lights when I head into the attic eventually.

The quote I have for rewiring the whole house with new 200 amp panel was $4k which includes all the permitting.

On the garage, we are talking a somewhat high amp welder: Miller Passport. This is a 110V/220V that is rated at 180A(I think)
 

theoldwizard1

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Personally, I find that 2 prong plugs are just fine for anything other than kitchens, bathrooms and any TV / AV center. No real reason to change them. If it makes you feel better, install one 3 prong grounded plug in each bedroom where it makes sense, a grounded double duplex near a logical TV or computer location and get the kitchen and bathroom up to code.
Providing a grounded outlet to those locations can be difficult/expensive. Code requires that new NW be installed to replace the old 2 wire NM, which means opening the wall to remove the old NM and properly secure the new NM.

For the locations I underlined, install a GFCI outlet with the warring sticker provided. A properly functioning, non-grounded GFCI outlet is probably safer than a properly installed grounded outlet.

I do not know if code allows a non-grounded GFCI in kitchen and bathrooms. It should as they are much safer than a plain non-grounded outlet.
 

2ManyProjects

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Thank you again for all the input.

My "$200 to $300" number is just wire and outlets. It does not include any panels or related.

But wasn't the main breaker panel one of the "hot button" issues driving this entire project? As I recall, you implied that it was already a fire looking for a chance to happen. :shocking:

$300 may be just a hair low but from what I've seen 250 feet of 12/2 wire is ~$150. A bulk of the wiring is within 10 feet of the panel.

Even so. That outlet ten feet away will require MUCH more than ten feet of wire to connect it. Typical scenario: From your breaker panel, you go up at least three or four feet to get above the top plate; then you go sideways ten feet atop that plate to get to the stud cavity containing the outlet; then another 6-7 feet down to reach the outlet box. Plus, you're going to "waste" at least a foot or so at each end by the time you do the initial pull, then trim it back to make the final connections. My my abacus, that's 21-23 feet for that "ten foot away" outlet.

My main concentration is on outlets only at this time.

If the panel is as inadequate (and in as sad shape) as you initially implied, you really ought to do it all, immediately. Consider also, that with all the additional circuits you were (at least initially) planning to run, you would probably run out of breaker slots on the old panel before you got everything hooked up. You MAY be able to find tandem breakers for that old panel; but that would be an exercise in throwing good money after bad, so to speak. If this means deferring the garage entirely for a few months, or even a year, so be it. But DON'T do a half-assed job in the house itself, in a futile attempt to "save money".

I will look into the four fixed lights when I head into the attic eventually.

What "fixed lights"? Did I miss something?

The quote I have for rewiring the whole house with new 200 amp panel was $4k which includes all the permitting.

Not at all surprising. If you do a lot (most?) of the work yourself, you can probably cut that in half.

On the garage, we are talking a somewhat high amp welder: Miller Passport. This is a 110V/220V that is rated at 180A(I think)

Not familiar with that model; but be aware that "output amps" are not at all the same thing as "input amps". I would wager heavily that welder does NOT draw anything like 180A from the wall; probably not even 50A; could be as little as 20-30A.

 

SlowAl

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Since you're in California, keep in mind the requirements for smoke/CO detectors and AFCI breakers for the living and bedroom area circuits. You may be required to update those to conform. You may need to take that in to account when planning your circuits.
 
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Lil'John

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But wasn't the main breaker panel one of the "hot button" issues driving this entire project? As I recall, you implied that it was already a fire looking for a chance to happen. :shocking:

The panel is sufficient for the home now. The problem with the panel is it is a Zinzco. From what I have read, it can catch fire if one of the breakers is overheated :willy_nil

Even so. That outlet ten feet away will require MUCH more than ten feet of wire to connect it. Typical scenario: From your breaker panel, you go up at least three or four feet to get above the top plate; then you go sideways ten feet atop that plate to get to the stud cavity containing the outlet; then another 6-7 feet down to reach the outlet box. Plus, you're going to "waste" at least a foot or so at each end by the time you do the initial pull, then trim it back to make the final connections. My my abacus, that's 21-23 feet for that "ten foot away" outlet.

Your number is very correct. But my plug wires are all run in the crawl space:p So down about 3 feet and then up about 2 feet but your point is well taken.


If the panel is as inadequate (and in as sad shape) as you initially implied, you really ought to do it all, immediately. Consider also, that with all the additional circuits you were (at least initially) planning to run, you would probably run out of breaker slots on the old panel before you got everything hooked up. You MAY be able to find tandem breakers for that old panel; but that would be an exercise in throwing good money after bad, so to speak. If this means deferring the garage entirely for a few months, or even a year, so be it. But DON'T do a half-assed job in the house itself, in a futile attempt to "save money".

I'm not sure on the additional circuits yet.

Pardon my ignorance on this but I believe I can "split" a circuit into two assuming I run the wiring correctly. So in theory, I can maintain my current circuit count but split them apart once I swap the panel. For example, I could run two separate circuits up to a junction box(leaving a little bit of extra wire), twist the two circuits together, and output to breaker panel.

The outlets/wire concerns me a bit more than the panel. My intention is to get the outlets/wire done in the next week or two. Then a month later, get the panel replaced.

What "fixed lights"? Did I miss something?

When I say fixed lights, I am referring to light fixtures on a light switch. I've got three light fixtures in the house plus 3-4 light switches. They aren't making funny noises so while I would like to replace those also, I have them lower on the list.

Not familiar with that model; but be aware that "output amps" are not at all the same thing as "input amps". I would wager heavily that welder does NOT draw anything like 180A from the wall; probably not even 50A; could be as little as 20-30A.

You are correct. The input is around 20-30A as I've run it off a 220V drier plug and a 110V washer plug. It will pop a 15A circuit though:lol:
 

Charles (in GA)

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If you do the rewire before replacing the panel, leave a couple of extra feet hanging down in that crawl space on each circuit, as you will need to route the wire different in the panel once it is replaced. Better to throw away a foot here and there than come up short. Once done with the new panel, go back in the crawl space and staple up the wires properly.

Indeed, you will need GFCI breakers on all bathroom and kitchen receptacles, a dedicated fridge outlet, a dedicated clothes washer outlet, and AFCI breakers on all other circuits. (in the code, the requirement for AFCI on all circuits takes place Jan 1, 2014 but I think Calif is already requiring it. These are pricey. Indeed, you will want to put two to three receptacles on each circuit. You can run to a 4x4 junction box where you split off to the receptacles, or run from one wall box to the next, daisy chaining. Your wall boxes may not be large enough for more than two wires plus the ground and the junction box method is easiest. Just screw them to the floor joists in the crawl space.

By code, you will need tamper resistant outlets. If you look, you can find decent quality spec grade ones, and not the cheapies. I don't like tamper resistant, as it puts the contacts further back in the receptacle, leaving just the tip of the plugs to make contact in the receptacles. They put some in the break room at work (why I do not know) and now the cell phone chargers and laptop power supplies won't stay plugged in.

Charles
 
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Lil'John

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Placerville, California
Thank you for the input.
If you do the rewire before replacing the panel, leave a couple of extra feet hanging down in that crawl space on each circuit, as you will need to route the wire different in the panel once it is replaced. Better to throw away a foot here and there than come up short. Once done with the new panel, go back in the crawl space and staple up the wires properly.

What you mention above was basically my intended route. Pull new wire as close to the panel, put a junction box, then join old wire with new wire. Make sure there is extra length so when the panel is replaced, the new wire can be pulled in.

Is there a best practice for securing the extra wire until the new breaker is in? I was thinking along the lines of "zig-zagging" the wire along a joist and staple the wire there.

Indeed, you will want to put two to three receptacles on each circuit. You can run to a 4x4 junction box where you split off to the receptacles, or run from one wall box to the next, daisy chaining. Your wall boxes may not be large enough for more than two wires plus the ground and the junction box method is easiest. Just screw them to the floor joists in the crawl space.

To be up to code, am I only allowed to run a wire from the junction box then the offshoots to plugs? I thought I had read that I'm not allowed to have more than one junction box on a circuit.

Indeed, you will need GFCI breakers on all bathroom and kitchen receptacles, a dedicated fridge outlet, a dedicated clothes washer outlet, and AFCI breakers on all other circuits. (in the code, the requirement for AFCI on all circuits takes place Jan 1, 2014 but I think Calif is already requiring it. These are pricey.

By code, you will need tamper resistant outlets. If you look, you can find decent quality spec grade ones, and not the cheapies. I don't like tamper resistant, as it puts the contacts further back in the receptacle, leaving just the tip of the plugs to make contact in the receptacles. They put some in the break room at work (why I do not know) and now the cell phone chargers and laptop power supplies won't stay plugged in.

Charles

Hmmm.... time to look into new special plugs:lol_hitti
 

3drob

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FWIW - I would NOT use 20A breakers anywhere but for known large loads (e.g. kitchen or garage). The idea of a breaker is to provide protection in case of overloads and should be sized accordingly (you don't want protection from your alarm clock in your bedroom @ the same amperage as you would use to protect your home against your air compressor in your garage).

12AWG instead of 14AWG on 15A circuits is most likely OK (less voltage drop on large loads is a good thing). Especially helpful if you are daisy chaining outlets (it's really overkill unless you have long runs). Be careful, though. There is a maximum number of wires you can have in an outlet box based on the size of the box, and that number drops as they get thicker (fewer wires allowed for 12AWG than 14AWG).

Also, be careful of code issues. You cannot just assume latest NEC. State, county, and possibly city gov't's will specify what version of NEC they require, and some have additions to NEC (my county has additional requirements beyond NEC).
Good luck.
 

2ManyProjects

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757
The panel is sufficient for the home now. The problem with the panel is it is a Zinzco. From what I have read, it can catch fire if one of the breakers is overheated :willy_nil
The outlets/wire concerns me a bit more than the panel. My intention is to get the outlets/wire done in the next week or two. Then a month later, get the panel replaced.

OK, if you're only talking about a delay of a month or so, then no big deal. I'd gotten the impression that you were now considering deferring the panel indefinitely (which usually means "not until it fails catastrophically and spectacularly" :shocking:).

Your number is very correct. But my plug wires are all run in the crawl space:p So down about 3 feet and then up about 2 feet but your point is well taken.

Fair enough. But the basic principle still applies -- count on using much more wire than you're currently estimating.

I'm not sure on the additional circuits yet.

If you're still figuring on a 200A panel, you will surely have WAY more than enough breaker slots to do pretty much everything you want, now or later. I still don't think you really NEED such a large (or such a high capacity) panel, in such a small house; but 200A panels are so commonly used/sold that they tend to be somewhat more cost effective than, say, even 150A panels. So if you have the physical space to accommodate such a beast, there's no really pressing reason to NOT use it.

Pardon my ignorance on this but I believe I can "split" a circuit into two assuming I run the wiring correctly. So in theory, I can maintain my current circuit count but split them apart once I swap the panel. For example, I could run two separate circuits up to a junction box(leaving a little bit of extra wire), twist the two circuits together, and output to breaker panel.

Well... Save for the fact that you've got your "ins" and "outs" turned around, that's more-or-less correct. HOWEVER... Between this, and a comment you make further down, I think there is a better way to do this. Hold that thought.


When I say fixed lights, I am referring to light fixtures on a light switch. I've got three light fixtures in the house plus 3-4 light switches. They aren't making funny noises so while I would like to replace those also, I have them lower on the list.

Ahhh... Now I understand.

{re: the welder}
You are correct. The input is around 20-30A as I've run it off a 220V drier plug and a 110V washer plug. It will pop a 15A circuit though:lol:

In which case, you really don't need to do anything very special to accommodate that welder. Now IF you foresee upgrading it to a much higher-power model at some point... Then it would make some sense to wire for the "big gun" model when you initially do the garage, rather than have to re-do things again later.


If you do the rewire before replacing the panel, leave a couple of extra feet hanging down in that crawl space on each circuit, as you will need to route the wire different in the panel once it is replaced. Better to throw away a foot here and there than come up short. Once done with the new panel, go back in the crawl space and staple up the wires properly.

What you mention above was basically my intended route. Pull new wire as close to the panel, put a junction box, then join old wire with new wire. Make sure there is extra length so when the panel is replaced, the new wire can be pulled in.

I'm not entirely certain that you and Charles are on the same page here. So pardon me if the following seems a bit pedantic...

Siamesing multiple circuits onto a single breaker, such as you describe, would be potentially useful ONLY if you really don't have enough breaker slots in the current panel to accommodate whatever you're installing. In which case, that's another argument for replacing the panel first (or at least concurrently), and being done with it.

In most cases, the "next best" choice would be to replace a few of the existing single-gang breakers in that box with tandem-type breakers, so that each of those "slots" will support two circuits. But if you're planning to trash the panel in a month, that would be a silly waste of money.

All that said, the method you describe IS the correct way to do such siamesing, if/when you must; but you must still observe the load limits imposed by that single breaker, even for the "temporary" lash up. And if a single (say, 15A) breaker will properly support both of those circuits when they're "siamesed" together, then there's really no point in wiring them as two separate circuits anyway, as the same will be true for the new panel as well. It would make more sense to design and install a single circuit with all devices daisy-chained conventionally, and be done with it.

In any event, you do NOT EVER attach two wires directly to a single breaker screw.

Finally IF you do this, you should make sure you're leaving enough extra wire in each of those individual runs (i.e., before they are joined in the J-box) so that when you do finally put in the new panel, you can remove BOTH all remnants of the old "jumper" leading from the panel to the J-box AND the box itself, then connect each individual circuit DIRECTLY to its breaker in the new main panel, with no intervening junctions/splices.

Is there a best practice for securing the extra wire until the new breaker is in? I was thinking along the lines of "zig-zagging" the wire along a joist and staple the wire there.

Since this entire scheme is a kludge to start with, there's really no "Best Practice" to be had. Just be sure that you DON'T damage the jacket on the cable through over-zealous stapling, or when removing those staples when it comes time to fish the cables up to the panel.

To be up to code, am I only allowed to run a wire from the junction box then the offshoots to plugs? I thought I had read that I'm not allowed to have more than one junction box on a circuit.

I'm not sure about any hard & fast limits on the number of J-boxes ("in series", so to speak) on any given circuit. But splices and junctions are in general undesirable, and should be avoided wherever possible.. Note that it IS standard practice to "daisy chain" a series of devices (duplex outlets, wall switches & light fixtures, etc.) together and feed them all from a single breaker/circuit, which (at least usually) inherently obviates (or at least limits) the need for separate junction boxes. Modern duplex outlets are expressly designed for this sort of installation.


FWIW - I would NOT use 20A breakers anywhere but for known large loads (e.g. kitchen or garage). The idea of a breaker is to provide protection in case of overloads and should be sized accordingly (you don't want protection from your alarm clock in your bedroom @ the same amperage as you would use to protect your home against your air compressor in your garage).

I'll second this, up to a point -- but ONLY up to a point.

Upsizing the wire itself is fine, as long as you don't get too carried away (I'd suggest AWG 12 at most for "normal" 15A lighting circuits and such), even if it is surely unnecessary in a house this small, and with wire runs as short as the OP describes. But since the breaker's ONLY "official" job is to protect that wire (and pointedly, NOT to protect whatever is plugged into the outlet), there's now really no good reason to NOT also use a 20A breaker, unless that wire run is SO long we never ever want to permit that much current to be drawn through the wire -- and in a 700 ft.^2 house, that just won't be the case.

OTOH, if we put "20A" outlets at the other end of the string, we are no longer really "upsizing" the wire at all, as it now must be expected that a 20A device WILL eventually be plugged into that outlet. So either way, I would use standard "15A" outlets and such, except perhaps in the garage.

12AWG instead of 14AWG on 15A circuits is most likely OK (less voltage drop on large loads is a good thing). Especially helpful if you are daisy chaining outlets (it's really overkill unless you have long runs).

Agreed; but again, in this particular case, it's a non-issue due to the short runs.

Be careful, though. There is a maximum number of wires you can have in an outlet box based on the size of the box, and that number drops as they get thicker (fewer wires allowed for 12AWG than 14AWG).

Someone who has a code book handy will probably cite the specifics.

Also, be careful of code issues. You cannot just assume latest NEC. State, county, and possibly city gov't's will specify what version of NEC they require, and some have additions to NEC (my county has additional requirements beyond NEC).
Good luck.

It's always good to know the rules BEFORE you start playing the game. ;)

 
OP
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Lil'John

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Placerville, California
Thanks for more input.
FWIW - I would NOT use 20A breakers anywhere but for known large loads (e.g. kitchen or garage). The idea of a breaker is to provide protection in case of overloads and should be sized accordingly (you don't want protection from your alarm clock in your bedroom @ the same amperage as you would use to protect your home against your air compressor in your garage).

I thought the protection provided by the breaker was for wiring and outlets not the items plugged in.

Using the alarm clock as an example, if it was going to be the only item on a circuit, shouldn't I start considering a 2-3A breaker?

Or the reverse example, I've got a 20A plug and wiring that supports 20A on a 15A circuit. If I plugged a 20A air compressor on it, the breaker would trip with no damage to the wiring/plug.
 
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Lil'John

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Placerville, California
If you're still figuring on a 200A panel, you will surely have WAY more than enough breaker slots to do pretty much everything you want, now or later. I still don't think you really NEED such a large (or such a high capacity) panel, in such a small house; but 200A panels are so commonly used/sold that they tend to be somewhat more cost effective than, say, even 150A panels. So if you have the physical space to accommodate such a beast, there's no really pressing reason to NOT use it.

I would agree that if I were leaving the home as it sits at 700 sq-ft, the 200A panel is probably way overkill.

But with the garage getting expanded with a bunch of fun power tools, I want that capacity.

I'm also strongly looking into a 3rd room and 2nd bathroom in about 5 years.


In which case, you really don't need to do anything very special to accommodate that welder. Now IF you foresee upgrading it to a much higher-power model at some point... Then it would make some sense to wire for the "big gun" model when you initially do the garage, rather than have to re-do things again later.

My welder does the work I need it to so no intention to go with some huge welder. But I'd rather go a little over expected draw and not need it.

All that said, the method you describe IS the correct way to do such siamesing, if/when you must; but you must still observe the load limits imposed by that single breaker, even for the "temporary" lash up. And if a single (say, 15A) breaker will properly support both of those circuits when they're "siamesed" together, then there's really no point in wiring them as two separate circuits anyway, as the same will be true for the new panel as well. It would make more sense to design and install a single circuit with all devices daisy-chained conventionally, and be done with it.

Part of the goal for splitting rooms apart is to make sure half a room is powered if I trip the other half and not so much going over capacity. The only room that I'm looking at capacity is the office room.

In any event, you do NOT EVER attach two wires directly to a single breaker screw.

Finally IF you do this, you should make sure you're leaving enough extra wire in each of those individual runs (i.e., before they are joined in the J-box) so that when you do finally put in the new panel, you can remove BOTH all remnants of the old "jumper" leading from the panel to the J-box AND the box itself, then connect each individual circuit DIRECTLY to its breaker in the new main panel, with no intervening junctions/splices.

Good point on the two plus wires on a single breaker. No intention of that.

Basically your second block above is my intention that wasn't stated well ;)

Since this entire scheme is a kludge to start with, there's really no "Best Practice" to be had. Just be sure that you DON'T damage the jacket on the cable through over-zealous stapling, or when removing those staples when it comes time to fish the cables up to the panel.

Yeah I would agree that it is odd so there isn't a "code". I just didn't want to leave 4-5 feet of loose wire from the last staple to the j-box hanging down.

I'm not sure about any hard & fast limits on the number of J-boxes ("in series", so to speak) on any given circuit. But splices and junctions are in general undesirable, and should be avoided wherever possible.. Note that it IS standard practice to "daisy chain" a series of devices (duplex outlets, wall switches & light fixtures, etc.) together and feed them all from a single breaker/circuit, which (at least usually) inherently obviates (or at least limits) the need for separate junction boxes. Modern duplex outlets are expressly designed for this sort of installation.

I'll have to look a little bit into the "daisy chain" on duplex outlets.
 

2ManyProjects

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Messages
757
Thanks for more input.


I thought the protection provided by the breaker was for wiring and outlets not the items plugged in.

Correct.

Using the alarm clock as an example, if it was going to be the only item on a circuit, shouldn't I start considering a 2-3A breaker?

Probably not even that much.

Unless that's one heck of an alarm clock, I doubt it's using even 30 watts (1/4 Amp @ 120V), let alone 240-360 watts. ;)

Or the reverse example, I've got a 20A plug and wiring that supports 20A on a 15A circuit.

To be pedantic about it for a moment, a 5-20R receptacle (i.e., your "20A plug") connected via 12/2 (or heavier) cable would by definition BE a "20A circuit". The fact that it may be (arguably inappropriately) fed from undersized (say, 15A) breaker doesn't change that; it only further limits the total current which can be drawn from that circuit, as installed (and in the process, provides a degree of extra protection, for the wire and receptacle, however unnecessary that may actually be).

If I plugged a 20A air compressor on it, the breaker would trip with no damage to the wiring/plug.

Near-certainly correct. OTOH, the breaker MIGHT not trip at all, pending the vagarities of that particular compressor.

I would agree that if I were leaving the home as it sits at 700 sq-ft, the 200A panel is probably way overkill.

But with the garage getting expanded with a bunch of fun power tools, I want that capacity.

I'm also strongly looking into a 3rd room and 2nd bathroom in about 5 years.

Ahhh... OK. That -- particularly the addition to the house itself -- makes your quest for a big panel somewhat more understandable. I still think 200A is serious overkill; but like I said, there's no huge reason to NOT go with it.

One other thought with respect to the garage in particular... I'm not sure if this has been mentioned yet (and I don't want to read back through the whole thread ATM), but when it comes time to do up the garage, you MAY want to consider going with a dedicated sub-panel, fed from one two-pole breaker in your main panel. If (as I believe) it is an attached garage, you don't necessarily "have to" do this; but there are some advantages to be had from this approach, regardless:

First, it takes pressure off your main panel, with respect to breaker slots for branch circuits. The entire garage can be supported via a one dual-pole (i.e., two-slot) breaker, more-or-less regardless of the actual amp draws involved. This further obviates the need for that big honkin' 40-slot main panel.

Secondly, while the feeder cable from the main panel to the sub-panel would obviously need to be much heavier (and thus both more expensive and a bigger PITA to install) than the 12/2 (or whatever) you'd use for an individual branch circuit, you only need to run ONE of them, regardless of the number of branch circuits in the garage. This would certainly make the overall job MUCH easier (and almost as certainly, less expensive -- particularly if you're figuring on a LOT of branch circuits in the garage).

My welder does the work I need it to so no intention to go with some huge welder. But I'd rather go a little over expected draw and not need it.

Understandable, and reasonable. I've since checked the specs for that welder; and IIRC, it only "needs" 20A from the wall. But were I in your shoes, I'd give it a dedicated 30A circuit anyway, for the very reasons you cite.

Part of the goal for splitting rooms apart is to make sure half a room is powered if I trip the other half and not so much going over capacity.

Again, both understandable, and reasonable. But do understand that you can do the same thing with a total of two "non-dedicated" circuits, more-or-less regardless of the number of bedrooms involved. That said, I'd probably limit myself to three (light-duty) bedrooms from two circuits, and go with at least three circuits to support four bedrooms. And pending the specific wiring runs involved, it MAY be just as easy to break things up further (i.e., into more circuits), as long as you have the panel space to support that.

The only room that I'm looking at capacity is the office room.

And again, unless you're running some sort of serious data center or server farm out of your bedroom, you really DON'T need all that much capacity. As mentioned before, a dedicated circuit for the computer stuff is not unreasonable; but 15A WILL be more than adequate for that.

I'll have to look a little bit into the "daisy chain" on duplex outlets.

Note the two sets of terminal screws. ;)

 
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Lil'John

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Placerville, California
Thank you for more great input.
One other thought with respect to the garage in particular... I'm not sure if this has been mentioned yet (and I don't want to read back through the whole thread ATM), but when it comes time to do up the garage, you MAY want to consider going with a dedicated sub-panel, fed from one two-pole breaker in your main panel. If (as I believe) it is an attached garage, you don't necessarily "have to" do this; but there are some advantages to be had from this approach, regardless:

First, it takes pressure off your main panel, with respect to breaker slots for branch circuits. The entire garage can be supported via a one dual-pole (i.e., two-slot) breaker, more-or-less regardless of the actual amp draws involved. This further obviates the need for that big honkin' 40-slot main panel.

Secondly, while the feeder cable from the main panel to the sub-panel would obviously need to be much heavier (and thus both more expensive and a bigger PITA to install) than the 12/2 (or whatever) you'd use for an individual branch circuit, you only need to run ONE of them, regardless of the number of branch circuits in the garage. This would certainly make the overall job MUCH easier (and almost as certainly, less expensive -- particularly if you're figuring on a LOT of branch circuits in the garage).

The garage is detached. My intention is to go to a sub-panel for all the reasons you mentioned.

Currently, the detached garage is run single circuit from main panel. I believe there are three circuits going there currently: clothes washer, clothes drier(220V), and rest of the garage. I won't even swear that the washer and rest of the garage aren't one circuit :dunno: But temp cleanup of THAT nest is another story.
 

2ManyProjects

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Jul 18, 2013
Messages
757
Thank you for more great input.

No problem.

The garage is detached. My intention is to go to a sub-panel for all the reasons you mentioned.

Plus one more: You have no choice, given the detached garage.

Currently, the detached garage is run single circuit from main panel. I believe there are three circuits going there currently: clothes washer, clothes drier(220V), and rest of the garage.

I'm more than willing to wager that is not even close to code-compliant. Have you tried getting Homeowners' insurance yet?

I won't even swear that the washer and rest of the garage aren't one circuit :dunno: But temp cleanup of THAT nest is another story.

Sleeping dogs, and all that. :rolleyes2:

 
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