2 pole shared disconnect

[hhsting]

I have 240V 2 pole shared fused disconnect that shares load with 120V single phase chair lift and 120V single phase trickle charger for battery backup of chair lift. I have total of 5#12 awg into disconnect 2 phase, 2 neutral and one ground.

Would this be allowed by the code?

 

[augie47]

why would it not be ??

 

[hhsting]

why would it not be ??

Well you have phase A, phase B neutral land on neutral bar in disconnect. Is that a problem? Also would this still be multiwire would it not? Neutrals are parallel

 

[augie47]

Read the definition of a MWBC (with separate neutral it's not)
The neutrals could be connected in such a manner that they are not in parallel (not on the neutral block)

 

[AdamTeeScott]

As long as the ground remains separate from the neutrals I don't see anything wrong with it.
Curious tho since you mentioned MWBC, are the two phases connected to a 2-pole breaker?

 

[hhsting]

Read the definition of a MWBC (with separate neutral it's not)
The neutrals could be connected in such a manner that they are not in parallel (not on the neutral block)

But if they wired phase A and phase B conductors so that they are in parallel then its a problem?

 

[hhsting]

As long as the ground remains separate from the neutrals I don't see anything wrong with it.
Curious tho since you mentioned MWBC, are the two phases connected to a 2-pole breaker?

No 2- single pole breakers


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[augie47]

But if they wired phase A and phase B conductors so that they are in parallel then its a problem?

Yes... don't connect the two neutrals together. You have two separate circuits.

 

[hhsting]

Yes... don't connect the two neutrals together. You have two separate circuits.

Ok I dont find this in any code section dont connect two neutrals parallel different phases. Ofcourse code is not install manual but you know which Article and section to look at for this?


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[augie47]

310.10(H)(1)

 

[hhsting]

310.10(H)(1)

Ok thanks and if they are in parallel installed then it would be multiwire no? Looked at definition Article 100 they would have voltage between ungrounded conductor and neutral if parallel installed

 

[jap]

I don't know why folks make something as simple as this so difficult.


JAP>

 

[LarryFine]

For one MWBC, you should use only one neutral wire, and a 20p or two tied 1p breakers.

For two 2-wire circuits, use both neutrals, but unparalleled, and any two 1p breakers.

There is no problem except possible inconvenience for two circuits sharing a 2p disco.

 

[hhsting]

I don't know why folks make something as simple as this so difficult.


JAP>

Sorrry just realize if its not possible then why do it

 

[roger]

The OP has started a new thread on this subject, if anyone wants to participate please go HERE