Errrrr . . . because HP from ordinary residential 120V, 15 amp breakers is limited to around 1.5 HP.

Bob Swinney
"Karl Townsend" wrote in message
...
On Mon, 23 Aug 2010 12:48:53 -0400, "Existential Angst"
wrote:

"Ignoramus23708" wrote in message
...
On 2010-08-23, Bob La Londe wrote:
Why are so many big milling machines 3 phase?

Its not about horsepower. I have a compressor with a 5 horse motor that
runs on 120V.

No you don't.

Yes he does.... well, 5 Sears hp...

Yep, everyone knows Sears compares to the number of Shetland ponies.

Quincy compares to the number of Clydesdales.

Karl