Replies

1. 
   IMERC | Feb 13, 2004 09:04am | #1

   If the motor is wired for 220v and protected by a breaker rated at 20 amps.

    

   Who ever invented work didn't know how to fish....

2. 
   cedarguy | Feb 13, 2004 12:20pm | #2

   Plus it cost half as much to run 220. The motor will last longer also.

   And do not forget----it's almost time to go fishing-- need to get those poles out and get some fresh line on them.

1. 
   jako17 | Feb 13, 2004 04:51pm | #3

   Hi ceder Guy ,Are you sure that it costs half to run on 220? I think the meters are set to measure both legs.We even get hit with a power factor with the 3phase to ensure we pay for everything.

1. 
   Elcoholic | Feb 13, 2004 05:18pm | #6

   Jako,

   If you're seeing excess kVAR charges on your bills, that can be fairly easily corrected by installing power factor correction capacitors or new high efficiency motors on the offending machinery.  An electrical engineer or industrial electrician can help you out.John O'Connell - JKO Handcrafted Woodworking

   Life is tough.  It's tougher if you're stupid - John Wayne

1. 
   jako17 | Feb 14, 2004 06:44pm | #9

   Thanks a million, the jointer is a 40's or 50's 7hp I will check out the capacitor thing

1. 
   IMERC | Feb 14, 2004 11:15pm | #11

   7HP... Make sure it isn't a 3 phase motor..... 

   Who ever invented work didn't know how to fish....

2. 
   GT | Feb 13, 2004 05:24pm | #7

   I believe a  3 phase motor gives you the option of runing it in both directions

1. 
   PlaneWood | Feb 14, 2004 03:56am | #8

   You know, residential electric meters don't measure phase angle.  I've often wondered how much free electricity I'm getting here with all the induction motors I'm running.

   Probably about 10 cents per month!

   PlaneWood by Mike_in_Katy (maker of fine sawdust!)PlaneWood

1. 
   Jamie_Buxton | Feb 17, 2004 01:30am | #13

   Mike --

   You said "residential meters don't measure phase". Can you expound a little? I've understood the meter to measure watts -- y'know, real power. Do they somehow measure only the current component that is in-phase with the voltage, and just ignore the rest?

2. 
   PlaneWood | Feb 17, 2004 02:11pm | #14

   That is my understanding, yes.

   PlaneWood by Mike_in_Katy (maker of fine sawdust!)PlaneWood

2. 
   jako17 | Feb 14, 2004 06:50pm | #10

   This is north america we run both ways anyway !  :-)

2. 
   Elcoholic | Feb 13, 2004 05:10pm | #4

   Sorry Cedarguy but that's not how it works.  We pay for power in watts not voltage or amps.  Just to keep the numbers easy we'll say a 1 hp motor = 1000 w.  So on a 240V circuit 1000/240 = 4.1 amps or on a 120V circuit 1000/120 = 8.2 amps.John O'Connell - JKO Handcrafted Woodworking

   Life is tough.  It's tougher if you're stupid - John Wayne

3. 
   SCFrankland | Feb 13, 2004 05:11pm | #5

   Most 1Hp DC's to my mind don't run 220 most are 110 only. Check on the motor housing to see if it has a wiring diagram to allow you to convert over to 220. If you have a 220 motor then go ahead and plug it in. 220 will not do anything to reduce your bill at the end of the month but it will add a little extra life to your motor.

   Scott C. Frankland

   Scott's WOODWORKING Website

   "He who has the most tools may not win the race of life but he will sure make his wife look like a good catch when she goes to move on."

4. 
   JohnWW | Feb 16, 2004 11:28pm | #12

   Many, but not all, induction motors used in power tools can be hooked up to 110 or 220 volts.  The motors specification plate will tell you this.  If the motor can be run on 220, the wires in its connection box will have to be hooked up differently, but that is easy to do.

   The wiring instructions will either be on the specification plate or on the inside of the connection box cover.  If you rewire for 220 volt, you'll have to put the proper plug on the power cord.

   If you aren't using the 220 volt line for anything else, it could be rewired at the breaker panel, and at the circuit's outlets, to be a 120 volt circuit.

   John W.