NEC 225.30

B

blueheels2

Senior Member
Location
Raleigh, NC
Occupation
Electrical contractor
Help me to understand the 2020 NEC 225.30.

I have a detached garage with an existing subpanel fed by a 2 pole 30z

Customer wants a ev charger 50 or 60 amp. Normally I would say refeed the subpanel and feed the charger out of that.
But does the 2020 allow me to feed the garage with 2 circuits as long as they come out of the same panel and. The breakers are side by side.

I don’t have a 2020 in front of me but I think it says they must be grouped together in the separate structure or terminate at one device.

Probably moot anyway, we are technically under the ‘17 and it’s not allowed under that code but I thought about asking for an exception.
 
blueheels2 said:
But does the 2020 allow me to feed the garage with 2 circuits as long as they come out of the same panel and. The breakers are side by side.
Click to expand...
So you want to leave the existing feeder and sub-panel and bring another branch circuit to the detached structure?
 
TV
infinity said:
So you want to leave the existing feeder and sub-panel and bring another branch circuit to the detached structure?
Click to expand...
Yes that was the idea . I know it’s not allowed in the ‘17 but I know the 2020 changed the wordings. I don’t have a 2020 code book so I was trying to see if it would be allowed under the 2020z
 
2023 has exception (7) under 225.30 - special occupancies. = Electric vehicle power transfer systems listed, labeled, and identified for more than a single branch circuit or feeder.

is this charger listed, labeled, and identified for more than a single branch circuit or feeder? i would seriously doubt it.

some of you code-gurus correct me if i'm wrong here, but that's referring to either some VERY LARGE chargers, or some kind of bi-directional charging units.
 
blueheels2 said:
Help me to understand the 2020 NEC 225.30.

I have a detached garage with an existing subpanel fed by a 2 pole 30z
Click to expand...
So under 2020 NEC 225.30(B) "Common Supply Equipment" you could install a 60A 2 pole breaker next to the 30A 2 pole breaker supplying that existing garage subpanel. And then run a supply to the garage, to a disconnect with OCPD that is installed next to the disconnect for the existing garage subpanel. [E.g. if the subpanel has a main breaker which serves as the 225.31 disconnecting means, next to the subpanel.] The OCPD in the new disconnect makes the new supply a feeder.

Cheers, Wayne
 
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