Can you always use emt,imc,rmc as a EGC?

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zappy

zappy

Senior Member
Location
CA.
Is there any time when you can't use it?If i run conduit with no ground wire to a 4 square box with a recepticle then do i just use a bonding jumper from the 4 square box to the ground screw on the recepticle?I know i should know this already:roll:Thank you for your help.
 
Just some additional thoughts, make sure that the grounding path back to the "bulls eye'' meets requirements....watch consentric knock outs and the like.....sorry I cant spell
 
Mostly yes.
But if its over 250 volts to ground, a concentric or eccentric KO has to be bonded around:250.97
For service bonding see 250.94
And for hazardous locations see 250.100
 
With the exceptions of post 3,4,and 5. If you are useing emt to a surface mounted 4" sq. box. You are not useing a equipment ground wire. If you are useing a specially listed grounding type outlet. Then the bonding jumper from the outlet to the box is not required.;)

I am sure every one will agree with me.:grin:
 
buckofdurham said:
If you are useing a specially listed grounding type outlet. Then the bonding jumper from the outlet to the box is not required.;)

I am sure every one will agree with me.:grin:
Click to expand...
I have never trusted grounding type outlets to actually carry fault current (The ones with the little spring clip on the screw), but it is in the code... :rolleyes: I have also never seen one fail to do so.

And when you cant use conduit as a EGC is when it is in the spec's that you cant...
 
Mule said:
Just some additional thoughts, make sure that the grounding path back to the "bulls eye'' meets requirements....watch consentric knock outs and the like.....sorry I cant spell
Click to expand...


You can use this if you want perfect spelling. :grin:

www.iespell.com
 
ptonsparky said:
I was going two recommend that sight too you to.
Click to expand...

Sorry Im such a hillbilly....my wireless connection is pretty slow for downloading, so I've not done it so far
 
e57 said:
I have never trusted grounding type outlets to actually carry fault current (The ones with the little spring clip on the screw)
Click to expand...

I'm a little surprised at this attitude. I would think that the tab on the recep would have a greater contact surface area Than the conductor wrapped around the grounding screw.
 
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