Code Requirements for Detached Building/Garages

[pcsailor]

Hello,
I installed a 50amp dedicated receptacle for an EV charger in a detached garage. I did this by installing a circuit breaker within the home basement in the service panel and running the wire out.
The inspector doesn't like this and wants a 'handle-tie' on all circuit breakers within the basement to kill the power to the garage in one action.

For the future he says for detached buildings the ideal way when installing EV receptacles is the following.
1) Disconnect, terminate, &/or remove the old wiring out to the building.
2) Size correctly and run a new feeder fed into a sub-panel within the detached building.
3) Run branch circuits from dedicated circuit breakers from the sub-panel to all loads within the building (lights, receptacles, & the new EV receptacle).

I was initiallly going by 625.40(pg512) but now I also see 230.70(A)(1)(Pg89) which the inspector is going by, I think. He hasn't actually given me any code references on this. I have given him the code and he's agreed or not.

So what is the code specifically referencing multiple loads within a detached building?
I have the following references.

NEC2017 Code References:
210.11(C)(4)(pg60)
210.52(G)(1)(pg66)
230.70(A)(1)(Pg89)
240.24(pg98)(OCPD accessibility)
225.30(A)(7)(pg81)(EV Plugs)
625.40(pg512)(EV Plugs)

Thanks,
Phil

 

[Dennis Alwon]

You cannot have 2 circuits going out to the garage unless you meet the special conditions which you clearly do not. So yes, you need to disconnect the old circuit and install a feeder to a sub panel.

BTW, are you an electrician- terminology that we use may make a difference

 

[infinity]

I agree with Dennis you need to run a feeder and install a panel at the detached garage. Your list is missing the correct applicable code section 225.30. 225.30(A)(7) is not applicable.

Part II. Buildings or Other Structures Supplied by a Feeder(s) or Branch Circuit(s)
225.30 Number of Supplies. A building or other structure that is served by a branch circuit or feeder on the load side of a
service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in 225.30(A) through (E). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit. Where a branch circuit or feeder originates in these additional buildings or other structures, only one feeder or branch circuit shall be permitted to supply power back to the original building or structure, unless permitted in 225.30(A) through (E).

 

[Little Bill]

If there is already a feed to the garage, or already a circuit out there, then Dennis and the inspector is correct. You can't have more than one feed to a building. Only exception is a MWBC can be considered a single circuit. But it doesn't sound like that what you have.

 

[pcsailor]

Thanks.
The local inspector is allowing a handle tie on both basement breakers going out to the garage.
In the future, we'll do one feeder into a subpanel.
Yes, I'm a master electrician in Minnesota, master of record for my company. But I've just moved here from 20+ years as a deep-sea marine engineer. So while I know electricity, I don't know NEC code (Art90-not applicable to ships), residential, nor new installations.
Yes, I have alot to learn. And I'm loving it <;
Phil

 

[Todd0x1]

So here's a question. Say you found a double 2 pole breaker with a handle tie that switches all 4 poles (I don't know if this exists), would the 4 wires coming off that breaker be considered one circuit?

 

[AC\DC]

I would assume no. Since to qualify for a single circut it has to supply only one piece of utilization equipment.

 

[infinity]

So here's a question. Say you found a double 2 pole breaker with a handle tie that switches all 4 poles (I don't know if this exists), would the 4 wires coming off that breaker be considered one circuit?

I agree with AC/DC no.