Recent content by Executive

Actually 404.2(C) requires a GROUNDED CONDUCTOR where switches are present for lighting loads. (Unless, of course, the circuit is in a raceway as in the case of the OP) :D Chris

I'm pretty sure I have a good understanding of the Code. I've been teaching it for over 20 years and have over 300 students licensed through my program. You need to read all of my posts in this thread, particularly #16 which references three phase MWBCs. "...systems that can obtain 150V or...

You are incorrect. Chris

First: all neutrals are grounded conductors but not all grounded conductors are neutrals. (We can leave the ungrounded secondary of a separately derived system out of this for the sake of clarity, and it is very unlikely that someone on this board is working with a corner grounded delta.) The...

Swap the GFCI breaker to an adjacent position either up or down on the panel. This will put in on the alternate "leg" and should correct the symptom of the GFCI tripping. You still need to track down the cause of the problem. Make sure that all the connections are correct on the breaker and...

Excellent. You have a code book. I don't have mine right here with me, but if I recall correctly, the NEC definition says something about carrying current under "normal conditions". A MWBC is not a "normal condition" and as such, Article 310.15(B)(5)(a) tells us that a neutral that only...

Please share that definition. And while you are looking it up, research why we all (incorrectly) call the grounded conductor a neutral. This will help you understand my point. Chris

The neutral is NOT always a current carrying conductor. In theory current is there, but in practice the current is cancelled by the opposing current of the "companion" part of the circuit in a multi-wire branch circuit. The grounded conductor in a multi-wire branch circuit (MWBC) only carries...

Couple of things: 1. Your existing service is single phase, not "two phase" (which does exist but is very rare). 2. It is very likely that what you really need is a 208/120 3-phase system, not a delta system, midpoint grounded or not. 3. Your best bet, and most economical would be to switch...

Well done! This gentleman knows his NEC! Chris

This is accurate but it should be noted that the 20 conductors mentioned in the example would have to be #12 rated for 90*C (THHN) to be good for 15 amps. Table 310.15(B)(3)(a) gives a 50% derating factor for 20 conductors in a raceway and the 90* Column of 310.15(B)(16) can be used if the...

11 in a single conduit and those #14 are no longer good for 15 amps. Chris

This is excellent and accurate advice. 100% correct. Nice work. Chris

My point exactly. Any motor will do its best to do whatever work you impose on it. Horsepower in this case could be used as an indicator of how much work can be done before the motor fails. Marketing people will put anything on a product to make it stand out against the competition. Your...

Excellent point. "Marketing horsepower" is different from real horsepower. Do you think that shop-vac Home Depot sells is really 6.5 horsepower with a 16 AWG cord? Same with compressors. If you do hard-wire this compressor, and I recommend that you do, you should install a disconnect switch...