I have a standard house panel (200 amp w/room left in the panel)(house built three months ago) and I want to feed a sub panel 100 feet away.
Outdoor weather proof sub panel mounted on a 8' stub pole will feed:
1. 5th wheel camper (micro, small stove etc)(more for after storm use or when friends come over for the weekend)
2. Fresh water well for camper 1 1/2 HP 240V (about 8 amps)
3. GFI receptacle under sub panel for a power cord if needed
Breakers to be installed in the sub panel to feed camper etc.
1. 1 each 50amp 220 feed
2. 2 each 20 amp 110 feed
3. 1 each 30 amp 220 feed
4. 1 each 20 amp 220 feed
I would like to use a 100 breaker to feed the sub panel & use #4 copper as the feeder. So I would use #4-4-4-6 (hot, hot, neu, ground). If I have to use #2 I can, no problem.
Below is what I'm confused on. Here I see a 100amp breaker & #4 but I really don't like that configuration, if it's ok then I'll use it.
The issue here is the difference between NEC tables 310.15(B)(6) and 310.16. The former allows a 100A breaker on #4 copper when used as a feeder, and the latter allows a 90A breaker. There is some interpretation controversy whether 310.15(b)(6) applies to subpanels as well as main panels; however I believe that 310.15(b)(6) clearly applies to main and subpanel feeders.
What do U think?
Thanks,
Outdoor weather proof sub panel mounted on a 8' stub pole will feed:
1. 5th wheel camper (micro, small stove etc)(more for after storm use or when friends come over for the weekend)
2. Fresh water well for camper 1 1/2 HP 240V (about 8 amps)
3. GFI receptacle under sub panel for a power cord if needed
Breakers to be installed in the sub panel to feed camper etc.
1. 1 each 50amp 220 feed
2. 2 each 20 amp 110 feed
3. 1 each 30 amp 220 feed
4. 1 each 20 amp 220 feed
I would like to use a 100 breaker to feed the sub panel & use #4 copper as the feeder. So I would use #4-4-4-6 (hot, hot, neu, ground). If I have to use #2 I can, no problem.
Below is what I'm confused on. Here I see a 100amp breaker & #4 but I really don't like that configuration, if it's ok then I'll use it.
The issue here is the difference between NEC tables 310.15(B)(6) and 310.16. The former allows a 100A breaker on #4 copper when used as a feeder, and the latter allows a 90A breaker. There is some interpretation controversy whether 310.15(b)(6) applies to subpanels as well as main panels; however I believe that 310.15(b)(6) clearly applies to main and subpanel feeders.
What do U think?
Thanks,
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