Best way to run duplex outlets

[Jon_E]

I just realized how cheap 3/4" EMT was, as I'm planning on starting my own electrical distribution in the garage soon. For the price, it's not worth even thinking about 1/2" conduit.

 

[sberry]

There is a place for 1/2 too. As I mentioned I like to get it in with 2 sizes and not above running another pipe to a clip like the hoist so as its somewhat isolated and doesn't need to be a rats nest with the rest of the building or so jammed up a guy cant shove a switch wire if he wants.
A was discussed the 8 for a welder, will go down a section of 1/2 just fine and we don't want someone to come back and add to the fill. The wire and pipe do only 1 function, could pass thru 3/4 but finish legs are often done with 1/2, switch loops, equipment disconnects etc.

 

[roadrunner255]

I would run two outlets to each location, on separate breakers. Reason being over the years I may setup a shop light for something I'm working on and if you pop a breaker with one circuit you have no light and no tool. I would run 20A breakers. #12 minimum, for the longer runs you may need to upsize to account for voltage drop. Cheaper & faster to overbuild a little now than redo it later. Just don't go crazy.

Hello All, I am in the process of wiring the duplex 20amp outlets using 2 120v 20amp breakers on across from each other in the panel (phase a and b).

Since I am sharing a neutral would I need a breaker tie or would it be better just to use on 20a 220v breaker?

I plan on having 2 @ 20 circuits for lights (one circuit for each garage bay) as well, can I share a neutral there as well?

This video references a bow or boat? with ground for a duplex outlet however, he doesn't mention what type of breaker he uses at the panel.

Thanks!

 

[sberry]

In a modern panel the legs are not across from each other but side by side. I really tend to use as much common stuff as I can, common 4x4 boxes and some deeper ones for specific devices, gfci and welder plugs. Depending on the location and machines may simply run another pipe for welder, in that case often a 10 wire unless I was going to run a 250 mig wide open.
This building is not so huge as to worry about V drop, the runs are short and just because there is a 20A breaker on a 12 doesnt mean that is the normal applied load, most of it way less from tools with factory supplied cords and 15A ends. The main reason for mwbc is pipe fill and wire savings from long runs.
I did one the other day, had a mwbc and a couple with their own neutrals due to gfci, yes, the run is 60 ft but most load is 5A and any more and even that is intermittent. Its on 24 minutes 1/4 loaded and not 24 hrs fully loaded.

 

[roadrunner255]

In a modern panel the legs are not across from each other but side by side. I really tend to use as much common stuff as I can, common 4x4 boxes and some deeper ones for specific devices, gfci and welder plugs. Depending on the location and machines may simply run another pipe for welder, in that case often a 10 wire unless I was going to run a 250 mig wide open.
This building is not so huge as to worry about V drop, the runs are short and just because there is a 20A breaker on a 12 doesnt mean that is the normal applied load, most of it way less from tools with factory supplied cords and 15A ends. The main reason for mwbc is pipe fill and wire savings from long runs.
I did one the other day, had a mwbc and a couple with their own neutrals due to gfci, yes, the run is 60 ft but most load is 5A and any more and even that is intermittent. Its on 24 minutes 1/4 loaded and not 24 hrs fully loaded.

Thanks, I will run the breakers that share neutrals side by side.

I appreciate the help

 

[sberry]

I am not sure exactly what you are asking. A 240 breaker is essentially 2 120V ones pinned together. It breaks both poles at once providing a disconnect. In a 240 circuit turning 1 pole off would stop the appliance but leave 120V power to half of it.
I now normally use doubles if I am wiring a mwbc vs hooking a couple singles together, the only down side is 2 tripped circuits or have to turn both off to work on it. Its so rare its not a big deal. I cant even recall the last time I had a tripped breaker.

 

[roadrunner255]

My bad, doing two things at once, and doing them both badly.

Disregard the question about the 240v, my original question was about sharing neutrals and not grounds.

Thanks!

 

[sberry]

You can share a neutral between 2 opposite poles. As I mentioned, I don't always do it cause I can, more if I need to or it really has some valid point.