Oppo electricians? Can I use this heater in the garage?

"XJDano" (xjdano) 09/25/2014 at 09:43 • Filed to: electric

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No photo, but i picked up an electric heater that is for 240v single phase. Can I wrote that into my garage sub panel? I assume my house is 220v single phase, but if that's the case would the heater work effectively? I don't have a photo of the heater, but I can snap one tonight. Here is the sub panel I put in garage.

crowmolly > XJDano 09/25/2014 at 09:46

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How many amps is the heater?

XJDano > crowmolly 09/25/2014 at 09:50

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i think 37 at 240. I forget. But while standing here watching demolition, my mind wanders. I forgot to get a picture of the waiting diagram on heater. I'll post that up tonight or tomorrow.

The main house panel is 200 amp & sub panel is 100amp.

Cé hé sin > XJDano 09/25/2014 at 10:15

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"I assume my house is 220v single phase..."

Depends where you live. If it's North America you nominally get 240v with which by effectively halving this you wind up with 120v appliances.

XJDano > Cé hé sin 09/25/2014 at 10:31

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That might be right. 120+120=240 not 220. Bad math.

wabbalosthiskey > XJDano 09/25/2014 at 11:07

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The 220/240 terms get interchanged all of the time just like 110/120 (reasons why are beyond the scope here) but basically it has to do with voltage drop as you go down the line... Some people may only actually see 115 at an outlet or even 110 by the time it reaches the applicance so the numbers are used loosely. You are talking about the same thing as long as it's a single phase unit, and yes that's what you have in the house.

In basic terms, your house has two 120v lines coming in, and to run something 240v (like your subpanel) you use two 120v legs together. Notice the breaker slots are on alternating legs; that way a double pole breaker picks up one of each and makes 240v.

XJDano > wabbalosthiskey 09/25/2014 at 11:13

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thanks, I figured that's kind of what it ment, just wanted to ask. Check this out. Does it mean 86 amps total?

NaturallyAspirated > XJDano 09/25/2014 at 12:26

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Are you in the US? AFAIK standard 240v power in the US is 3 phase. You might be able to get 208v from phase B to neutral.

Cé hé sin > wabbalosthiskey 09/25/2014 at 16:59

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You do have exotic electricity supplies in America don't you?