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-   -   Can I run a small (500 watt) 240 V space heater at 120V? (http://www.diychatroom.com/f18/can-i-run-small-500-watt-240-v-space-heater-120v-35458/)

pcampbell 01-08-2009 05:08 PM

Can I run a small (500 watt) 240 V space heater at 120V?
 
Stupid question but will it work and is there any safety reason not to do this? Will it only put out half the wattage, or will it draw 2X the current, or both or neither? I know the wire to it is a 12/2 home run, and not very long, so I don't think 500 watts is the concern.

This is electric baseboard BTW.

EDIT... Just read that in fact it will put out 1/4 of the power... does that sound right? Not going to heat up even a little bathroom I'm sure!!!

junkcollector 01-08-2009 05:26 PM

Quote:

Originally Posted by pcampbell (Post 209526)
Just read that in fact it will put out 1/4 of the power... does that sound right?

Yah, sounds right.

rgsgww 01-08-2009 05:33 PM

Why run it at 120? 12/2 will give you 240.

pcampbell 01-08-2009 05:59 PM

I only have one 1" spot left. No worries, thanks...

rgsgww 01-08-2009 06:03 PM

Quote:

Originally Posted by pcampbell (Post 209558)
I only have one 1" spot left.

replace some breakers with tandems?

KE2KB 01-08-2009 06:34 PM

Or, combine circuits that aren't being used efficiently.
Example: My basement (finished) has two fluorescent lights on a 15A breaker. I can add lots more to that branch.

micromind 01-08-2009 09:56 PM

A 500 watt heater designed for 240 volts and operated on 120 will produce 125 watts. The current will be 1.04 amps.

Provided it's a heating element only (no fan), it will not be damaged, and not the slightest bit unsafe.

Rob


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