Parallel Feeders in nipples

[admiralporklung]

Is this acceptable? I say no, but can't prove it. Please help fast!!!!

 

[texie]

Absolutely not compliant.

 

[admiralporklung]

Absolutely not compliant.

Please tell me why.

 

[tom baker]

Magnetic fields do not cancel, thete will be induced currents in the nipples, heating and possible fire. Do a thermal scan

 

[Coppersmith]

All of the phases are required to be in each pipe for the reasons mentioned above. In situations where a ground wire is run in the pipe, a duplicate ground wire is required in each pipe.

 

[tom baker]

Other than that, a very nice job, cable ties, duct seal.

 

[rambojoe]

That is oddly unfortunate... what if the engineer screwed up the pipe schedule...and he (clearly a meticulous wireman) didn't catch the mistake?

 

[ptonsparky]

Plastic and some slots would have worked.

 

[qcroanoke]

All of the phases are required to be in each pipe for the reasons mentioned above. In situations where a ground wire is run in the pipe, a duplicate ground wire is required in each pipe.

A,B,C plus ground in each raceway.

 

[LarryFine]

Absolutely not. The wires coming into the left enclosure show it done correctly.

And when it's rewired, the three wires of each phase should remain the same length.

 

[wwhitney]

Compliant if the nipples, connectors and enclosures are non ferrous? That would (almost?) eliminate the inductive heating effects. The enclosures are probably ferrous, though.

Cheers, Wayne

 

[infinity]

Electrician 101. Could use aluminum raceways and cut slots. I would prefer a wireway.

 

[LarryFine]

Compliant if the nipples, connectors and enclosures are non ferrous? That would (almost?) eliminate the inductive heating effects. The enclosures are probably ferrous, though.

Yes, non-ferrous conduits and slots between holes would suffice.

I've often wondered why steel locknuts aren't an issue, though.

 

[don_resqcapt19]

300.3(B)(1).

 

[don_resqcapt19]

Yes, non-ferrous conduits and slots between holes would suffice.

I've often wondered why steel locknuts aren't an issue, though.

Probably because of the small amount of magnetic material...can't make enough heat to be a problem.

 

[infinity]

Probably because of the small amount of magnetic material...can't make enough heat to be a problem.

I agree, with use steel locknuts with MI cable connectors and cut slots between the conductors without any issues.

 

[electrofelon]

300.3(B)(1).

Finally on post #14 we get a code section!

 

[tom baker]

Code we don't need no stinking code!
This is one of those rules that illustrates the code is not an instruction manual. But the reason this can't be done is well grounded in electrical theory.
Brian John posted a picture some time ago of a similar installation, IR photo had the conduits red, IE, hot! I can't find the picture at the moment

 

[Russs57]

I do find it curious anytime I see such craftsmanship but a seeming lack of knowledge of fundamentals.

 

[electrofelon]

I do find it curious anytime I see such craftsmanship but a seeming lack of knowledge of fundamentals.

Yeah I find that baffling.