Timeline for What is the maximum sub-panel amperage I can use, and is my setup okay?
Current License: CC BY-SA 4.0
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| Nov 10, 2020 at 17:38 | comment | added | JRaef | OK, maybe I shouldn't have said "200A panel", I meant the LOAD on the sob panel being higher than the load on the main... The point I was making is that you cannot just go by the size of the sub panel, it has to do with the LOAD on the sub panel and the existing LOAD on the main panel. | |
| Nov 10, 2020 at 6:10 | comment | added | Ed Beal | I agree with Greg you can put in any size sub panel. Other than the panel size having to be the same or larger than the feeder breaker, the limiting factor is the wire size feeding the panel that is what sets the feeder breaker you can feed a 100 amp panel from a 10awg wire with a 30 amp breaker. I have done just this. For the most part a 100 /125 amp breaker is the largest size you can find but there are larger breakers available 4 pole paralleling 2 double pole very expensive. | |
| Nov 9, 2020 at 23:52 | comment | added | Greg Hill | There's nothing inherently wrong with wiring a 200A-rated sub panel downline from a 100A main panel. Of course it couldn't be provisioned for any more than the lesser of the 100A main or the branch breaker that feeds said 200A panel, but this is a different matter from the capacity of the sub-panel's bus bars/lugs/etc. | |
| Nov 9, 2020 at 21:13 | history | answered | JRaef | CC BY-SA 4.0 |