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-   -   charging subpanel ... more questions (http://www.diychatroom.com/f18/charging-subpanel-more-questions-153771/)

amakarevic 08-15-2012 12:54 PM

charging subpanel ... more questions
 
1. do i use the same kind of circuit breaker to charge a subpanel as i would for a regular circuit?

2. if i use a 100A circuit breaker on the main panel to charge the subpanel, will AWG 3 wires suffice for black/red/neutral? and can i go smaller for the ground?

thanks

kbsparky 08-15-2012 02:09 PM

The minimum size of equipment grounding conductor for a 100 Amp feeder or circuit is #8 copper.

The #3 feeders are fine.

amakarevic 08-15-2012 06:37 PM

can i go smaller than 3 AWG. i am gonna go with a cable, not loose conductors actually

Stubbie 08-15-2012 06:50 PM

What is the amperage rating for the sub-panel ?

andrew79 08-15-2012 07:11 PM

If its being fed off a 100a then it has to be #3

amakarevic 08-15-2012 08:12 PM

Quote:

Originally Posted by stubie
What is the amperage rating for the sub-panel ?

200 but i am feeding it off of a 100A circuit breaker in the main panel. I got a bigger amperage because i may switch it to its own meter in the future

k_buz 08-15-2012 08:57 PM

If you are using AL cable to feed the sub you need 2/2/2/4.

kbsparky 08-15-2012 10:19 PM

That #2 SE cable is only good for 90 Amps max ....

k_buz 08-15-2012 10:23 PM

Quote:

Originally Posted by kbsparky (Post 989856)
That #2 SE cable is only good for 90 Amps max ....

:censored: looked at the wrong column. As you can tell, we don't use much AL wire here.

stickboy1375 08-15-2012 10:36 PM

Quote:

Originally Posted by k_buz (Post 989859)
:censored: looked at the wrong column. As you can tell, we don't use much AL wire here.

Dont worry, most guys around here use table 310.15(B)(6) when wiring subpanels. :no:

MisterZ 08-15-2012 11:00 PM

Quote:

Originally Posted by stickboy1375 (Post 989868)
Dont worry, most guys around here use table 310.15(B)(6) when wiring subpanels. :no:

Umm, were you referring to 310.15(b)(16)??

k_buz 08-15-2012 11:03 PM

Quote:

Originally Posted by MisterZ (Post 989884)
Umm, were you referring to 310.15(b)(16)??

No I think he is referring to 310.15(b)(7) in the 2011 code. He is still using the 2005...(b)(6) was changed to (b)(7) in the 2011.

MisterZ 08-15-2012 11:06 PM

Ahh thanks, i have 08 and 2011..... maybe we should ask cossac what he thinks. Hahaha.

Try to out-funny me now Stickboy;)


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