equipment ground not bonded to box ?

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wdalrymple

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I just recently got a request to fix a tripped breaker at one of our dorms. turns out there are several issues that need to be addressed.(192 duplex receptacles)these are receptacles just recently installed by electrical contractor, and still under warranty. this was work done before I started here.
1. there is only enough wire in box so that when wire comes into back of box to duplex receptacles you cannot pull receptacle out to fix cut wire.
2. none of the equipment grounds are bonded to box."according to my boss he was told by contractor that the self grounding clips on the receptacles takes care of this, bonding"
 
Re: equipment ground not bonded to box ?

If the outlets are of the self grounding type the installation is code compliant as far as the grounding.

250.146(B) Contact Devices or Yokes. Contact devices or yokes designed and listed for the purpose shall be permitted in conjunction with the supporting screws to establish the grounding circuit between the device yoke and flush-type boxes.
Click to expand...
The short conductors are a problem.

Edit: I re read your post, are you saying the grounds are attached to the device yokes and not to the box?

That is a violation. 250.148 and 250.148(A)

[ June 19, 2004, 05:01 PM: Message edited by: iwire ]
 
Re: equipment ground not bonded to box ?

sorry out of room

3. 20 #12's THHN in 2" conduit. 15 circuits 5 neutrals. each is on 20 amp breaker, serving 3 -15 amp duplex receptacles.
any thoughts as to the right and wrong of this installation would be appreciated.


Thanks Will Dalrymple Tx EM #10559
 
Re: equipment ground not bonded to box ?

15 hots with 5 neutrals for outlets is 15 current carrying conductors, that is a 50% derate.

The breaker should not be larger than 15 amps for those circuits or they should have used 10 AWG.

Bob
 
Re: equipment ground not bonded to box ?

The grounding conductor must bond to a metal box. The self-grounding receptacles are only to bond from box to receptacle & not from receptacle to box.
 
Re: equipment ground not bonded to box ?

I can not understand why any contractor would not bond the EGC to the metal box and the outlet. To me the small amount of time and material is worth the extra safty this provides. Your talking about 2 hours labor and 93' feet of wire (approx $150.00 for both). :confused:
 
Re: equipment ground not bonded to box ?

We would never even think of not grounding the box.Leave 1 ground wire long enough to wrap around ground screw.Takes maybe extra 30 seconds.Inspectors here do look for it on rough
 
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