Two Duplex

[Jerryr]

In a manufacturing facility, can you put two duplex receptacles in the same 4 x 4 box, on two different 20 amp circuits and share the common?

 

[bphgravity]

Yes.......

 

[LAYMAN JOE]

no reason why you cant

 

[A/A Fuel GTX]

Yes.....as long as the two circuits are on different phases.

 

[LarryFine]

. . . and the shared neutral is pigtailed, so neither receptacle depends on the other's connection.

 

[Dennis Alwon]

In a manufacturing facility, can you put two duplex receptacles in the same 4 x 4 box, on two different 20 amp circuits and share the common?

So you see Jerry, there are a lot of yes as long as....

If you have a mutiwire branch circuit the neutarl may be shared assuming the breakers on on different phases. Since the receptacles themselves are on different yokes then two single pole breakers will work. If, however, you wanted added safety you may use a dp breaker that will disconnect both hots at the same time.

 

[buck33k]

If, however, you wanted added safety you may use a dp breaker that will disconnect both hots at the same time.

Thats a very good point. 210.4 and 210.7 addresses the same yoke. Maybe the same (dp breaker) should apply to the OP situation.

 

[iwire]

How about I run three 14 AWGs (Black, Black, Green) and one 10 AWG (White) in PVC conduit to this box.

The two black 14 AWGs will be ungrounded conductors supplied from single pole breakers on phase 'A'. The green 14 will be the EGC and the white 10 AWG will be a shared neutral.

Any problems?

 

[LarryFine]

How about I run three 14 AWGs (Black, Black, Green) and one 10 AWG (White) in PVC conduit to this box.

The two black 14 AWGs will be ungrounded conductors supplied from single pole breakers on phase 'A'. The green 14 will be the EGC and the white 10 AWG will be a shared neutral.

Any problems?

Troublemaker!

We've hashed this out before. The multi-circuit (per phase) shared neutral is only directly addressed in outdoor festoon lighting.

 

[roger]

We've hashed this out before. The multi-circuit (per phase) shared neutral is only directly addressed in outdoor festoon lighting.

And it is not prohibited anywhere.

BTW, in Bob's example we do not have a neutral.

Roger

 

[iwire]

BTW, in Bob's example we do not have a neutral.

Roger

LOL

DOH!

And I re-read my post a number of times before posting looking for holes. :grin:

I agree with Roger, I should have said 'shared grounded conductor', it is not a neutral.

 

[iwire]

The multi-circuit (per phase) shared neutral is only directly addressed in outdoor festoon lighting.

Exactly, it is not prohibited, or allowed.

It is mentioned, discussed addressed but not ruled on.:grin:

All 225.7(B) tells us is 'don't overload the neutral' which may not even be a neutral.

Troublemaker.

:grin: