I searched and found a few examples of something close to this, but I can't discern a definitive answer to this question. Sorry if it's dumb. I have some knowledge of wiring and electrical systems, but when mismatched voltages come into play, I'm not 100% confident. Here's the deal...

You are watching: Can i use a 208 volt heater on 240 volts

I have 100amp 240v 3phase cable coming into the main breaker box of a food cart. The electric griddle is 240v, 15amp, so no problems there. However, the fryer I found is 15amp, 60Hz, and 208v. Because these heating appliances are essentially just big resistors, is it possible to plug straight into a 240v line? If not, whats the best/cheapest strategy to slow it down? Thank you.


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Three-phase 208 wye is a newer replacement for three-phase 240 high-leg delta. Most 208V equipment will work just fine on 240, though you'll have to check the nameplate or manual.

Does it only say 208, or does it have a voltage range like 208-230?


It says 208V almost everywhere, then I checked another spec sheet this morning, which said 208/240. I'm guessing I'm in the clear now. Sorry for the trouble and thank you for your response.


You're giving the fryer a 15% over-voltage. If it wasn't designed for that, the risk is that the heating elements would get hotter than intended which could be a fire risk. It might not be an issue, but I would want the manufacturer tech support to vouch for that.

The fix would be to buy two 500VA bucking transformers, which would run about $160, but an electrician would have to wire them.


This is what I hoped for. I replied to another comment, but almost everywhere only said 208v, then I checked another spec sheet this morning, which said 208/240. I'm guessing I'm in the clear now. Sorry for the trouble and thank you for your response.


So definitely have an electrician come out to check. If you have a delta high leg system you have both 208 and 240 voltages supplied from the panel. The high leg to neutral will be 208 and and other two legs together will be 240. Have them check for that though.

Otherwise if it is a single phase system call the manufacture to make sure it’s a non issue however most appliances are made for either voltage.


Need to know the actual device!

The heater will probably be fine, but the controler might not like it. If it has one.


If you are in North America then you have 208 volt 3 phase. 240 volt is single phase on this side of the planet. However, usually appliances are capable of working between 240 and 208. At least where I live and what I’ve seen. Just gonna draw a bit more.


Thank you for your response. Rest assured, I am having a professional electrician do maintenance on the system. I wanted to see if the appliance was possible before ordering.

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