Power panelboard

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Frank27

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Electrician
In North Carolina. 2020 NEC. Need to add a 240 volt, 20 amp oven circuit on a house. Is it now pemissible to run this from the 200 amp, main lug, meter combo since they did away with that article about power/ lighting & appliance panelboards. I think 30 amp or less with a neutral wasn't allowed before 2008.
 
I probably can't answer your question, but I was wondering what a 200 amp, main lug, meter combo was.
 
If you're asking what I'm thinking. That has always been allowed, because it is 240-volt equipment. The rule your thinking of was 408 something for 120-volt lighting and outlets. If you don't have a main breaker, you still have 230-71(A)
 
Eguipment is a 200 amp meterbase with attached main lug panel (All in one) that has twelve spaces and serves as the service equipment/ disconnecting means. This allows for up to six two pole breakers to serve as the two to six disconnecting means. Adding a 20 amp two pole ckt with neutral to the existing panel that has three two pole breakers in it means >10% of devices are < 30a with a neutral qualifying it as a lighting and appliance panelboard which requires overcurrent protection on the supply side. Since the NEC no longer distinguishes between power/ lighting & appliance panelboards, does this even apply any more?
 
Frank27 said:
Eguipment is a 200 amp meterbase with attached main lug panel (All in one) that has twelve spaces and serves as the service equipment/ disconnecting means. This allows for up to six two pole breakers to serve as the two to six disconnecting means. Adding a 20 amp two pole ckt with neutral to the existing panel that has three two pole breakers in it means >10% of devices are < 30a with a neutral qualifying it as a lighting and appliance panelboard which requires overcurrent protection on the supply side. Since the NEC no longer distinguishes between power/ lighting & appliance panelboards, does this even apply any more?
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This is a similar to the old split bus panels that had the 12 spaces in the top that were for 6 double pole breakers. I don't see an issue doing what you want to do as long as it's a double pole. I'm wondering if the new 230.71(B) (service discos need to be in separate enclosures) would come into to play with this one. Is the gear older or was it installed under the 2020 NEC?
 
It was possibly okay ten years ago, but I would assume added circuits would now be judged with the 2020 230.71(b) restriction in effect. This would disallow the "split bus panel" type arrangement. There would need to be "six separate enclosures", one for each 2-pole breaker, for this addition, nixing the old split bus arrangement.
 
I think the answer is yes, it's permissible. If the panel label says anything about it that probably has more sway than anything the NEC says now.
 
Frank27 said:
In North Carolina. 2020 NEC. Need to add a 240 volt, 20 amp oven circuit on a house. Is it now pemissible to run this from the 200 amp, main lug, meter combo since they did away with that article about power/ lighting & appliance panelboards. I think 30 amp or less with a neutral wasn't allowed before 2008.
Click to expand...
Just fyi.
In NC one and two family dwellings are still 2017 code
 
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