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#12347 - 08/08/02 01:03 AM egc's  
Cindy  Offline
Member
Joined: Jun 2001
Posts: 196
PDX, OR, US
egc = equipment grounding conductor

residential kitchen, small appliance bc in 2 gang box with switch leg for light..... crimp sleve the egc'c for both, or keep them separate? why?

also is there a code restriction to not cut off one of 2 tails from an egc crimp sleve? or is just one tail ok for the device? thanks


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#12348 - 08/08/02 07:43 AM Re: egc's  
electric-ed  Offline
Member
Joined: Jul 2002
Posts: 175
Canada
bc = ????


#12349 - 08/08/02 08:15 AM Re: egc's  
joeh20  Offline
Member
Joined: Mar 2002
Posts: 95
Tullahoma, TN, 37388
branch circuit=bc???
just joes guess here small appliance branch circuit


Lighting the way

#12350 - 08/08/02 08:36 AM Re: egc's  
sparky66wv  Offline
Member
Joined: Nov 2000
Posts: 2,236
West Virginia
Still no decoder ring...

[Linked Image]

All equipment grounds in a box are to be bonded (spliced) togther, even if they are on different circuits. This is NOT to be mixed up with noodles, for they should remain independant from other circuits.

Even though it isn't widely enforced, the 6" free conductor length also applies to EGC's, so the shortest one has to be 6" (with 3" available outside the box).

Sorry, book's in the truck, I'm lazy this morning, so no code refs...

[Linked Image]


-Virgil
Residential/Commercial Inspector
5 Star Inspections
Member IAEI

#12351 - 08/08/02 08:38 AM Re: egc's  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Cindy,
250.148 tells me that all EGCs must be joined together.
With multiple devices in a box, leaving the multiple tails on the EGCs makes it easy to ground the devices.


#12352 - 08/08/02 08:46 AM Re: egc's  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,878
NY, USA
joeh20,

Good Call!
I was wondering about 'bc' myself.

[Linked Image]
Bill


#12353 - 08/08/02 09:42 AM Re: egc's  
ElectricAL  Offline
Member
Joined: Oct 2001
Posts: 597
Minneapolis, MN USA
Cindy,

As to the "why" for tying the egc of one circuit to another (or others). . .this creates multiple parallel return paths for fault current. The egcs form a net or web. The overall resistance of the egc is reduced by the parallel resistances.

Al


Al Hildenbrand

#12354 - 08/08/02 03:14 PM Re: egc's  
WNYJim  Offline
Member
Joined: Jun 2002
Posts: 39
Rochester, NY, USA
I use Buchan spice caps for the EG. Slide the cap over long ground leads (after twisting them together). Leave one lead for each device and if it’s a metal box leave one for that also. Then cut off the remainder.
Also on rough in, I like to group the leads for each device and do a “barber pole” wrap with the ground wire.


#12355 - 08/08/02 09:27 PM Re: egc's  
Cindy  Offline
Member
Joined: Jun 2001
Posts: 196
PDX, OR, US
sorry, i must be the worst at over-using abbreviations here

some tie all egc's together, and some only tie the 12awg's together and put the 14awg's together in separate crimp sleeves, 250.148 seems to say all egc's are to be tied together, but it says "where circuit conductors are spliced" so i guess they could argue that it doesn't say "where DIFFERENT[12awg, 14awg] circuit conductors are spliced" they have to be spliced together. so if all ciruits with egc's in a plastic box are required to be spliced together, why doesn't it get turned down by inspectors? i just saw this today.

Al, thanks, that's a different way of looking at the parallel path idea for me. i always thought of parallel paths as bad things.

about the decoder ring thing.
maybe over in the left margin with the advertisements we could have a quick easy reference decoder ring listing of abbreviations of the top ten or so, think of all the bytes we could save [Linked Image] my votes are for these.
GEC grounding electrode conductor
GC grounded conductor
UGC ungrounded conductor
EGC equipment grounding conductor
BC branch circuit
OCPD overcurrent protection device



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