02:13PM | 09/19/05
Member Since: 09/18/05
2 lifetime posts
I'm was adding a 240v outlet for a window a/c.

I'm getting a 250v reading at the panel.

Is this ok to use even at 250v?

Tom O

03:46PM | 09/19/05
Member Since: 09/17/02
477 lifetime posts
Actually, if you look at the receptacle carefully, you will find out that it is rated 250 volts, so no problem.


08:20PM | 09/19/05
Member Since: 09/18/05
2 lifetime posts
What about the Window Unit?

Should it be able to handle 250v?

Also in general, I know that sometimes the voltage could be 208 up to I guess 250. An appliance that is suppose to have 240 can handle that type of range in voltage?

Thanks for your help.


06:22AM | 09/20/05
Member Since: 04/25/05
1915 lifetime posts
The nominal voltage is 120/240 volts. NOT 110/220.

I *think* that the acceptable range is 114-126 (228 - 252). It has been a while since I looked at that and ti depends about if you are only talking about the variation in the supply from the power company or also includ voltage drops within the building.

For some historical reason motors are label with a nominal supply of 115 (230), but that is for 120 (240) systems. Don't know what the labels on window AC's are labeled.

208 volts is a completely different supply system (3 phase). Some equipment that is designed for 240 can work on 208 and other not.

Your AC will work fine on the 250 volts. And in fact higher is much better than lower for motor driven equipment.

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