240.4g

[AC\DC]

This allows for certain loads to go off 75% for 10 and lower- if I used for mini split installed 12 on a 25 amp breaker—- does this also apply to my egc—- never thought about it till today don’t have book—- inspector never said anything- but as soon as that 12 on 25 I need a 10 ground correct?

 

[Dennis Alwon]

I agree the equipment grounding conductor is based on breaker size but it never needs to be larger than the phase conductors.

 

[AC\DC]

So then is that a gray area??

 

[Dennis Alwon]

So then is that a gray area??

How is it gray? If the breaker is 25 amps with a #12 conductor (assuming 75(C)), then the equipment grounding conductor only needs to be #12

 

[AC\DC]

How is it gray? If the breaker is 25 amps with a #12 conductor (assuming 75(C)), then the equipment grounding conductor only needs to be #12

Cause does 250.122 get modified table says not exceeding——- and gives amperage- I get your part but wondering what unknown k spectir will say

 

[don_resqcapt19]

Cause does 250.122 get modified table says not exceeding——- and gives amperage- I get your part but wondering what unknown k spectir will say

The inspector can only inspect to the code. The following from 250.112(A) is very clear.

"The equipment grounding conductor shall not be required to be larger than the circuit conductors supplying the equipment."

 

[Dennis Alwon]

Here

250.122(A) General.
Copper, aluminum, or copper-clad aluminum equipment grounding conductors of the wire type shall not be smaller than shown in Table 250.122. The equipment grounding conductor shall not be required to be larger than the circuit conductors supplying the equipment. If a cable tray, a raceway, or a cable armor or sheath is used as the equipment grounding conductor, as provided in 250.118 and 250.134(1), it shall comply with 250.4(A)(5) or (B)(4).
Equipment grounding conductors shall be permitted to be sectioned within a multiconductor cable, provided the combined circular mil area complies with.Table 250.122.

 

[AC\DC]

OK, it does override 250 you.122

 

[infinity]

OK, it does override 250 you.122

Yes it does override 250.122 when applicable.

 

[AC\DC]

Thank you