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Subject: Voltage question

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Philny    Posted 05-03-2019 at 20:36:25 [URL] [DELETE]        [Reply] [Email]  
  • Voltage question
  • I just bought a Grizzly table saw and itís wired for 230 volts , I like to wire it 120 as itís due voltage 3 hp motor .i canít see where s any advantage to be 230 volt .any thoughts ?

    Walt/Tx    Posted 05-06-2019 at 09:39:51 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Voltage question
  • 3hp at 230V =17 amp load
    3hp at 115V =34 amp load

    All motor loads must allow for starting load called ďlocked rotor ď amps. A 30A single pole will not hold at 115V, even with capacitor which your 3hp motor has I would bet.

    Proper wiring would be 30a 2 pole breaker with #10 wire minimum on 230 volts.
    Thereís a lot more to it in the code but thatís the bottom line.

    Tim Daley(MI)    Posted 05-04-2019 at 08:08:26 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Voltage question
  • You can easily wire another 220 breaker in the fuse box and run a conduit to the garage/shop for it. Not going to convert it to 120. Contact an electrician if you don't know how.

    Tim Daley(MI)

    Philny    Posted 05-04-2019 at 19:51:38 [URL] [DELETE]        [Reply] [Email]  
  • Re: Voltage question
  • The saw located in my garage ,where I have a 200 amp panel. I was an industrial electrician most of my working life . I read up a lot on this and thereís no advantage of higher voltage other than wire size .

    Bruce Dorsi    Posted 05-04-2019 at 20:30:56 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Voltage question
  • Just out of curiosity, Phil, but if you have the knowledge and panel nearby, why would you want to run it on 120v?

    Philny    Posted 05-04-2019 at 21:15:47 [URL] [DELETE]        [Reply] [Email]  
  • Re: Voltage question
  • I could tell you a big tail but mostly just was wondering what you guys thought.

    David D. Smith    Posted 05-04-2019 at 06:40:58 [URL] [DELETE]        [Reply] [Email]  
  • Re: Voltage question
  • Don't do it and I doubt it can be done.
    1 hp is 746 watts times 3 is too much for a 120 circuit.

    Philny    Posted 05-04-2019 at 21:20:05 [URL] [DELETE]        [Reply] [Email]  
  • Re: Voltage question
  • I sometimes forget thereís a lot of differents home from work electrical. At work we had a lot of 30 amp. Single pole breakers .

    Farmer Dan    Posted 05-04-2019 at 06:12:39 [URL] [DELETE]        [Reply] [Email]  
  • Re: Voltage question
  • 220 is much better. If you want to convert something make your other electric motors 220, its more power and costs less.

    woodworker40    Posted 05-04-2019 at 04:58:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Voltage question
  • Yes the 230 V will give you more power and it will cost less to operate. I have all my equipment on 220v when I can.

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