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Three Phase #209283
03/22/13 12:38 PM
03/22/13 12:38 PM
Joined: Mar 2004
Posts: 251
Kingwood, TX USA

Work Gear for Electricians and the Trades
Re: Three Phase [Re: WESTUPLACE] #209284
03/22/13 03:00 PM
03/22/13 03:00 PM
EV607797  Offline
Joined: Oct 2006
Posts: 745
Fredericksburg, VA, USA
Holy cow! Talk about a completely useless subject and answer.


"But the guy at Home Depot said it would work."
Re: Three Phase [Re: EV607797] #209285
03/22/13 03:04 PM
03/22/13 03:04 PM
sparkyinak  Offline
Joined: Jul 2007
Posts: 1,329
Does any poco offer a 3 phase residential rate? A small commercial rate with demand factors is the closet I know but that would be an expensive bill each month

"Live Awesome!" - Kevin Carosa
Re: Three Phase [Re: WESTUPLACE] #209286
03/22/13 05:47 PM
03/22/13 05:47 PM
wire_twister  Offline
Joined: Jul 2007
Posts: 265
Georgia USA
A few houses around here have 3 phase services, put in 20 or more years ago. As far as I know the power companies do not offer a three phase residential service. The only advantage I see is for HVAC, but at least around here all the AC equipment suppliers only offer a 1 year warranty on commercial(three phase) units, while a 10 or more year warranty on residential units. That is on the compressor of course.


Life is tough, Life is tougher when you are stupid
Re: Three Phase [Re: WESTUPLACE] #209287
03/22/13 08:18 PM
03/22/13 08:18 PM
Tesla  Offline
Joined: Jun 2004
Posts: 1,273
Sacramento, CA
IIRC, in the EUSERC area (Western States) the upper limit for single phase service is 400 Amps.

If a mega-mansion needs more then it's going to be 3-phase: 208Y120 Volts.

Center-tapped delta 240 is no longer permitted in new installations -- as a rule.

(The machine tool industry has phased out 230V delta motors for quite some time. Dual voltage 230/460 is the norm. So, 480/277 Volt Services are the EUSERC industrial shop solution.)

EUSERC has banned/ shunned center-tapped delta Services because of their higher rate of risk for injury and damage. They are still available -- but only by exception/ convenience to the Poco.

When I look at the Service blues that pop up on ECN photo pages -- I'm pursuaded that the whole country ought to adopt EUSERC standards.

Re: Three Phase [Re: WESTUPLACE] #209310
03/23/13 12:10 PM
03/23/13 12:10 PM
harold endean  Offline
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
There is one house in all the towns I inspect that has 3 phase and it was a very old install. The gentleman used to have a small machine shop in his basement. If he took it out now, he would never get it back though. I also believe it was a delta hook up. Not sure, I haven't been in it for nearly 10 years.

Re: Three Phase [Re: WESTUPLACE] #209311
03/23/13 12:11 PM
03/23/13 12:11 PM
harold endean  Offline
Joined: Feb 2002
Posts: 2,233
Boonton, NJ
By the way,


Re: Three Phase [Re: WESTUPLACE] #209319
03/23/13 08:18 PM
03/23/13 08:18 PM
HotLine1  Offline

Joined: Apr 2002
Posts: 6,934
Brick, NJ USA
Years back I did a resi with 600 amp, 120/208, 3 phase. It was a mansion back then, not Mc; 3 phase loads were AC, and pool pumps. Yes, the POCO had a $$$ for the install and the monthly fees were high, but the owner did not care.

The big issue was 'does the conduit come in any clors, along with the 'big gray box' (CT cabinet)???

THere is one resi in the Twp I work in that has OLD 3 phase, delta, for an extinct machine shop.

Re: Three Phase [Re: WESTUPLACE] #209321
03/23/13 08:25 PM
03/23/13 08:25 PM
electure  Offline

Joined: Dec 2000
Posts: 4,265
Fullerton, CA USA

I clicked on the 'DexKnows' logo at the top of the page, and then on 'About Us'.

Dex One advertises their services as:
"At Dex One®, we offer online and print advertising opportunities"....."We want to help you reach, win, and keep local customers wherever, whenever, and however they look for a business like yours."

So it's an advertising company. And probably not a very good one, at that.



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