How do you ground a metal box with larger gauges?
- Thread starter enochian
- Start date
sparky 1971
Well-known member
Nobody here is a mind reader. What is the wire size? A green screw works with a crimp on fork terminal.
mike93lx
ALLIANCE MEMBER
I'm going to take a leap and throw this out there
Southwire #14 SOL/STR - #1/0 STR Dual Rated Mechanical Lug with Single 1/4 in. Hole Mount (2-Pack) 65180640 - The Home Depot
Southwire dual-rated mechanical lugs are used to terminate conductors in power and grounding applications. This lug is designed with a single mounting hole. Accommodates 2 conductors. Specified for use
www.homedepot.com
bluedog225
Well-known member
Is that aluminum. Looks like it. I’ve wondered about alu with copper ground wires. Why doesn’t that cause the same type issues we see with copper wiring in houses? i.e. corrosion and loss of continuity.
Maybe because grounding lugs are not exposed to AC?
I ask because I picked up a box full of aluminum lugs at Restore but have been hesitant to use them.
Maybe because grounding lugs are not exposed to AC?
I ask because I picked up a box full of aluminum lugs at Restore but have been hesitant to use them.
sparky 1971
Well-known member
The green screws aren't long enough.I'm going to take a leap and throw this out there
Southwire #14 SOL/STR - #1/0 STR Dual Rated Mechanical Lug with Single 1/4 in. Hole Mount (2-Pack) 65180640 - The Home Depot
Southwire dual-rated mechanical lugs are used to terminate conductors in power and grounding applications. This lug is designed with a single mounting hole. Accommodates 2 conductors. Specified for usewww.homedepot.com
sparky 1971
Well-known member
Pretty much all lugs are aluminum.
Bad Habit
Well-known member
The lugs are a different alloy than whats used for wire. Much more stable for corrosion and thermal characteristics. All lugs should have markings for what type of wire they are rated for. Have never seen an aluminum lug not rated for CU wire (UL/ETL listed ones at least)
mike93lx
ALLIANCE MEMBER
GE Bonding Screw TBS - The Home Depot
The GE Bonding Screw is a replacement ground screw that is used to ground a wire to an enclosure. This screw is designed for use with PowerMark Gold 100 - 200 Amp load centers.
www.homedepot.com
?
There have been lugs made of aluminum but were copper conductors only. AL lugs are fine in most cases, I would not use one where it was exposed to the weather but that is a rare situation.
Gozo
Well-known member
When ever I’ve had that concern, I’ve put a bit of Noalox in with the wires. I think it’s more of peace of mind thing than anything else. My CH breaker panel has aluminum ground buss bars with bare copper wiring; 50 years, not a bit of corrosion. Then again, it’s in a 100% dry environment.
wyliesdiesels
Well-known member
is the ground bar an add-on? CH panels typically come with copper busbars
alfredeneuman
Well-known member
There are 2 types of Cutler Hammer breakers.
The CH has silver plated copper busbars.
The BR has aluminum.
Which type do you have?
Gozo
Well-known member
I had to go check. It’s the CH. and I thought they were aluminum all this time. Learn something new everyday on GJ.
I still have a bottle of Noalox in the garage. Used it on appliance grounding lugs over the years. Probably more mental and insurance than anything else.
wyliesdiesels
Well-known member
nope not quite. Cutler hammer is no longer around as they were bought by eaton. So there isnt 2 types of CH breakers. Theres 2 types of EATON breakers- Eaton CH and Eaton BR
The BR breaker line was formerly made by BRYANT before eaton took them over.
larry4406
Well-known member
And here we are again talking amongst ourselves and the OP is not to be found.
mike93lx
ALLIANCE MEMBER
We care too much
GJ would have to resort to a "random problem generator" to otherwise keep us all entertained.
I'm going to take a leap and throw this out there
Southwire #14 SOL/STR - #1/0 STR Dual Rated Mechanical Lug with Single 1/4 in. Hole Mount (2-Pack) 65180640 - The Home Depot
Southwire dual-rated mechanical lugs are used to terminate conductors in power and grounding applications. This lug is designed with a single mounting hole. Accommodates 2 conductors. Specified for usewww.homedepot.com
So the 2 wires go into the 2 holes right?
No wire nut right?
mike93lx
ALLIANCE MEMBER
Your EGC lands there, then you run it out to the receptacle. The connection to the box comes with it screwed to the ground hole.
We still don't know what wire size or type you are dealing with, though. That bar is not what I would use if a nut would suffice
alfredeneuman
Well-known member
Old habits die hard. At least I didn't say Westinghouse. (it was originally Westinghouse's product)
acer66
Well-known member
I might go out on a limb here but I have the feeling not everyone spends most of their waking hours here on GJ.
mike93lx
ALLIANCE MEMBER
Gtfo with those shenanigansI might go out on a limb here but I have the feeling not everyone spends most of their waking hours here on GJ.
Sounds like someone has found a New Year's resolution.
Doozer75
Well-known member
Not a different alloy.
The connection lugs are silver plated to prevent dissimilar metals corrosion.
The silver is very thin, but that is the difference.
Wire is just aluminum.
Lugs and buss connections are plated.
Silver is also used on switch contacts.
The reason for this is,
the oxide form of silver is nearly the same
conductivity as pure silver.
As we know from copper turning green,
this is very not true for copper.
-Doozer
2 different projects with stranded aluminum wire.
1. In-wall oven with some kind of obscure legacy SEU cable
2. Hardwired drop-in stovetop.
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