Residential wiring questions

[awg]

I am an industrial electrician and could use some clarification on residential wiring practices. 1. Is it acceptable to feed the dining room receptacles off of a kitchen small appliance circuit? 2. Are the NM wiring rules for running cable in a crawl space the same as for an unfinished basement? Specifically running at angle across the lower edge of the joist. I have seen this done several times but would have thought a crawl space would be treated the same as an unfinished basement.

Thanks in advance

 

[charlie b]

I do not know the answer to #2.

But my answer to #1 is "Yes." I actually think of SABCs in the opposite direction, not the direction of, "Here is a SABC, can I add that outlet to it?" Rather, I seeit as, "Here is a Dining Room, and in this room I see a receptacle on the wall. By rule, that causes the circuit feeding the receptacle to become a SABC. As such, we are now prohibited from adding outlets to that circuit, unless those outlets belong on a SABC. That said, I don't think it's a good idea. I would prefer to keep the kitchen countertops on circuits that do not leave the kitchen.

 

[bphgravity]

1. Yes. See 210.52(B) of the NEC.

2. No, however, the other provisions of 334.15 would apply IF the AHJ approves the installation of NM cables in a crwl space. See 334.10(A)(1) and 334.12(B)(4).

 

[KJay]

1] Yes, but if you are using the 2008 NEC then 210.12 requires the dinning room circuits to be AFCI protected, where as the kitchen circuits do not need AFCI protection. So, you probably would want to run a separate dedicated 20A circuit for the dinning room receptacles to avoid possible problems with false tripping.
2] Yes, if using the 2008 NEC, the requirements for crawl spaces are the same as for unfinished basements. See 334.14[C]. Unless the NM cable is 8/3 or 6/2, it?s not allowed to be stapled to the bottom of joists.

 

[buddhakii]

1] Yes, but if you are using the 2008 NEC then 210.12 requires the dinning room circuits to be AFCI protected, where as the kitchen circuits do not need AFCI protection. So, you probably would want to run a separate dedicated 20A circuit for the dinning room receptacles to avoid possible problems with false tripping.
2] Yes, if using the 2008 NEC, the requirements for crawl spaces are the same as for unfinished basements. See 334.14[C]. Unless the NM cable is 8/3 or 6/2, it?s not allowed to be stapled to the bottom of joists.

I agree with KJay