NEC 250.122 (B)

[ka6chp]

GENTLEMEN: IN RE NEC 250.122 (B), IF I GO FROM 12 AWG TO 10 AWG TO COMPENSATE FOR VOLTAGE DROP (ON SOME EXTERIOR LIGHTING), DO I ALSO HAVE TO INCREASE THE GROUNDING/BONDING WIRE FROM 12 TO 10? THE BREAKER IS 20 AMPS. THANKS.

 

[George Stolz]

Re: NEC 250.122 (B)

That's an awesome question! To which...uh...

Since 250.122 is based on the OCPD, I'd say that the ground doesn't change.

But that's my guess.

 

[bphgravity]

Re: NEC 250.122 (B)

Yes, the equipment grounding conductor must also be increased.

The real question is when you go from say #10 to #6 Both would generally only require a #10 egc, yet the section doesn't give an exceptions.

[ December 04, 2004, 09:53 PM: Message edited by: bphgravity ]

 

[kiloamp7]

Re: NEC 250.122 (B)

bphgravity is correct & has a good point on the # 6.
You could maybe think of a 60A ckt. & the fact that EGC of # 10 is okay for it.

Earlier NEC's, such as 250-95 in '96 Code, actually spoke of adjusting size for voltage drop .

 

[charlie b]

Re: NEC 250.122 (B)

Originally posted by ka6chp: GENTLEMEN:

Let's give equal consideration to the ladies who are members of this Forum. Also, please drop the ALL CAPS.