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#125465 - 04/30/05 02:03 PM saw voltage problem
pabloj24 Offline
Junior Member

Registered: 01/19/05
Posts: 3
I bought a 2 1/2 horse power diamond saw. It has a switch on the top which can be changed from 110 to 230 volts. It says the saw can run off of either voltage. THe thing draws 17 amps at 110 volts - keeps blowing fuses - so i want to hook it up to my generator. The manual says it only draws 9 amps at 220 volts. My generator has a 220 volt output, and a capacity of 5500 watts. At 110 volts the saw runs, but isnt very powerful and stalls when trying to cut a brick. the output of my generator has 4 prongs (wires) for it's 220 output. HOWEVER the saw only has 3 wires. I bought a four prong wire plug at the hardware store and spliced it into the saw wire - but it wont turn on. The saw originally saw came with TWO plugs (which you could unscrew and splice on to the wire yourself) this was because the saw can handle 110 or 230 volts. (one plug for each voltage) THe 230 volt plug only has 3 prongs (as well as the normal 110 volt prong) My 220 volt generator has 4 prongs. WHAT DO I DO TO CONNECT THEM?????? I did (green/ground to green/ground) , (white/neutral to white/neutral) and then I combined the Hot red and black wires coming from the generator and connected them to the one black wire going into the saw. THe saw wouldnt turn on. Is there a reason why the saw is 230 and not 220 volts? and how can i make it run at 220 volts? Thanks for any help.

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#125466 - 04/30/05 02:07 PM Re: saw voltage problem
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
Before we go to deep do you by chance have any background with electricity?

Done incorrectly you could create a real electrical hazard.

No offense intended.

Bob
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#125467 - 04/30/05 02:11 PM Re: saw voltage problem
pabloj24 Offline
Junior Member

Registered: 01/19/05
Posts: 3
i have a mechanical engineering degree and have taken a few electrical classes. But i'm no expert

I thought the two HOT wires coming out of the generator were each 110 volts and combining them would make 220 volts.

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#125468 - 04/30/05 02:13 PM Re: saw voltage problem
Dnkldorf Offline
Member

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
Just a guess without seeing your generator, but the green is ground, the white is the nuetral, the black is phase A, and the red is Phase B.

Did you measure the voltage at the 4 prongs of the generator to verify which pins were what, before you spliced them together?

If you connected the black and the red together from the generator, and hooked them up to the black wire that goes to the cord...
You didn't make 220v.

You might want to pull out a meter before hooking anything else up, you may be buying a new saw or a new generator, or worse.

Dnk...........

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#125469 - 04/30/05 02:14 PM Re: saw voltage problem
Dnkldorf Offline
Member

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
Quote...

I thought the two HOT wires coming out of the generator were each 110 volts and combining them would make 220 volts.

STEP AWAY FROM THE GENERATOR..........

LOL

Dnk.........

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#125470 - 04/30/05 02:18 PM Re: saw voltage problem
pabloj24 Offline
Junior Member

Registered: 01/19/05
Posts: 3
I bought an extencion cord to run between the generator and saw. green is ground, white is neutral, and there are a red and a black wire left over. I have an electrical tester, but didnt try it yet. THe major problem is the saw is a three wire 230 volt system, while the generator is 4 wire. am i going to need some kind of transformer to run this saw at 220, or will i be able to gen a simple adapter or splice some wores? ............. could the 230 volts be for use in Europe?

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#125471 - 04/30/05 02:22 PM Re: saw voltage problem
Dnkldorf Offline
Member

Registered: 12/12/04
Posts: 1091
Loc: nowhere usa
Listen, this may sound brutal, but here goes.

Stay a mechanical engineer, a live one.

For $100/ call an electrician, and you'll stay alive for another day.


I don't want to sound ignorant to you, but electricty is not a hobby.

Dnk.......

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#125472 - 04/30/05 02:33 PM Re: saw voltage problem
Sandro Offline
Member

Registered: 12/30/01
Posts: 449
Loc: Stoney Creek, ON, Canada
Most gennys have a 120v or 120/240V switch. Make sure you have the switch on the 240V side. Just a thought.

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