ECN Forum Forums Code Related Discussion NEC & other Code issues MULTI WIRE CIRCUITS

Very interesting thread here....a few years back "harmonics" was the buzz word in the trade, you could'nt swing a dead cat without hitting an article about it, fixtures & equipment started comming out with a THD rating. Courses started popping up , and of course, every trade mag followed suit...

The circuits are 3 phase 120/208. Our temp. solution is to rewire the lab w/ dedicated neutrals. Only problem is this pushes the problem to the service conductors feeding the panel that feeds the equipment.

well gents you all lost me at about post reply # 13 but it is sure interesting reading even though I haven't a clue about most of this ha ha

Electician,
Don't forget that when you use individual grounded conductors for each circuit, all of the conductors are current carrying and derating in Table 310-15(b)(2)(a) will apply.
Don(resqcapt19)

Don,

I sent a direct E-Mail to you [a reply] on this subject. Let me know if you did not receive it and I'll resend.

Once we get this figured out, I'll post the results to this thread.

Scott "S.E.T."