Cutting Mixed Metals

[dstig1]

Didn't say it was illegal, just that the power company won't do it... Not sure about your reference either, but it could be true, I just don't know.

 

[Rock knocker]

It's an ICC interpretation

E3702.1 Branch-circuit voltage limitations.
The voltage ratings of branch circuits that supply luminaires or receptacles for cord-and-plug-connected loads of up to 1,400 volt-amperes or of less than 1/4 horsepower (0.186 kW) shall be limited to a maximum rating of 120 volts, nominal, between conductors.

Branch circuits that supply cord-and-plug-connected or permanently connected utilization equipment and appliances rated at over 1,440 volt-amperes or 1/4 horsepower (0.186 kW) and greater shall be rated at 120 volts or 240 volts, nominal.

 

[dstig1]

Hmmm. i wouldn't read that the way you said it earlier "limited to 120 to ground" This says between conductors, thus allowing 240V. Now you aren't going to get 460V 3ph this way, for sure, but I can only imagine someone seriously needing that at home... You certainly could get 208 3 ph by the way i read that restriction. And how does ICC apply to electric code? That is almost always based on NEC, IME...

 

[Rock knocker]

If the ICC "outlaws" an electrical application, then you can't put it into the house.

 

[dstig1]

Well I suppose that depends on if your state adopts ICC or some other code... Or if they adopt it and modify it (seen that thing done here already...)

 

[Rock knocker]

Well I suppose that depends on if your state adopts ICC or some other code... Or if they adopt it and modify it (seen that thing done here already...)

Well you could weasel out of any code reference by saying it was dependent on if the AHJ adopted that particular code (in whole or part, without modification to the part in question). This includes the NEC.

Both residential codes in general use in the USA require general utility outlets and lighting circuits to be 120v, and other circuits cannot exceed 240v. A 120/208 three phase system is completely OK in a residence, it just becomes unlikely that the POCO will pull the service. But 277/480 service is disallowed in SFR's.

 

[dstig1]

I don't consider it weaseling at all as being in Wisc, they do not fully adopt all the codes. No i am not current on it, but I recall noting it a couple years back when I was going for my permit. And furthermore they add their own stuff that is not in the national codes... Found that out the hard way in one instance. You work with whatever jurisdiction you are in. I'm quite sure you are right, but there may be exceptions around the country.

 

[woodlandfarms]

So here is a question about phasing. If you can get 208 3 phase will that run a lot of these 3 phase tools? I know the big boys are 460 but.....

 

[Rock knocker]

I don't consider it weaseling at all as being in Wisc, they do not fully adopt all the codes. No i am not current on it, but I recall noting it a couple years back when I was going for my permit. And furthermore they add their own stuff that is not in the national codes... Found that out the hard way in one instance. You work with whatever jurisdiction you are in. I'm quite sure you are right, but there may be exceptions around the country.

It is probably because of adopted codes, such as the ICC. But as you say, you wouldn't know because you're not current on code adoptions in your state.

Didn't say it was illegal, just that the power company won't do it... Not sure about your reference either, but it could be true, I just don't know.

 

[Rock knocker]

If you can get 208 3 phase will that run a lot of these 3 phase tools? I know the big boys are 460 but.....

Likely