On Sun, 09 Sep 2007 03:13:48 GMT, "Pete C."
wrote:

"Bruce L. Bergman" wrote:

On Sat, 08 Sep 2007 09:12:18 -0500, "Pete C." wrote:
Mastic wrote:

All of the commercial / light industrial places I've been to had 208/120
Y service. Only seen 240 delta in heavy industrial settings. Based on
some 5 yrs of CNC service in the northeast.

I have 440 delta and 240 single phase in my garage, delivered from the
mains.

Lucky you. Not much need for 440 and the more expensive switchgear to go
with it unless you have a really big installation.

Or you have a small shop operation and need to run specialized gear
that only comes 480V 3-Ph. You can do a LOT more from a 480V 200A
service than from a 240V 200A service.

You can boost 240V up to 480V with transformers, but you have to be
careful to not max out the 240V service. The front office gets very
annoyed when you blow the main and black out the whole building.

-- Bruce --

If it's even remotely close to maxing out a 240V 200A 3ph service, it's
a big installation, no mater how physically small it may be.


Chuckle..I did that yesterday.

Had 6 Moog Hydrapoints and 4 Okuma Twin Turrets running on a 200 amp.

Then I added a Okuma LS2200

Ooops

Well..he was hogging with a 1.25" drill bit. Shrug
The hogging exceeded my very very thin margin..

Busted tools in just about every machine.

Gunner