can i control a 240vac motor with spst switch?

jhconoverJune 12, 2013

Can I control a 240V motor using a SPST switch on one leg without causing damage to the motor if I leave the other leg hot?

Thank you for reporting this comment. Undo
bus_driver

Yes.

    Bookmark   June 12, 2013 at 10:16PM
Thank you for reporting this comment. Undo
brickeyee

Yes. it is done all the time.

Just keep in mind if you work on anything that there is still at least 120 V on the connections.

Disconnects open both poles for this reason.

    Bookmark   June 13, 2013 at 9:56AM
Thank you for reporting this comment. Undo
Ron Natalie

To reinforce what BRICKEYE is saying, yes you can control the motor that way, but if you are using the switch as a REQUIRED DISCONNECT you need to remove all the hot legs.

    Bookmark   June 13, 2013 at 10:27AM
Sign Up to comment
More Discussions
Disposer Power Cord
I recently bought a GE disposal online. The model is...
africanboy
Testing a fluorescent bulb
I've got a light box that isn't lighting up when I...
kudzu9
Confused & need help please
I know just about zero when it comes to electricity....
bicyclegirl1
Grounding Service panel 200amp
Is the new NEC saying to no longer run # 4 copper wire...
36066
1 of 2 security light bulbs keep going out, do i need a new light?
I have a security light fixture in my carport that...
tlbean2004
Sponsored Products
Arc 5 Wet/Dry Shaver
$600.00 | Horchow
Indoor Ceiling Fans: Progress Lighting AirPro Builder 52 in. Antique Bronze Ceil
Home Depot
Blendtec Kitchen Mill - 52-601-BHM
$179.95 | Hayneedle
52" Modern Fan Nimbus Matte Nickel with Light Ceiling Fan
Euro Style Lighting
52" Monte Carlo Sleek Brushed Steel Ceiling Fan with Light
Lamps Plus
Beckwith Oil-Rubbed Bronze Four Light Ceiling Fan and Light Kit with Cream Shade
$499.00 | Bellacor
Hunter Italian Countryside 52-inch Ceiling Fan with Cocoa Finish and Five Aged B
Overstock.com
42" Modern Fan Cirrus Brushed Aluminum Ceiling Fan
Euro Style Lighting
© 2015 Houzz Inc. Houzz® The new way to design your home™