Wiring 5000W garage heater

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Old 03-09-09, 03:45 PM
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Wiring 5000W garage heater

I have a chance to replace a 4Kw heater (broken) with a 5Kw heater.
The 4K had been hardwired (conduit) from the panel to the heater with 10/3 and a 30A breaker.
Can the 5Kw heater use the same wire & breaker?

Or, basically, what wire size & breaker for a 5000W heater?
SteveS
 
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Old 03-09-09, 03:53 PM
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What voltage?



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Old 03-09-09, 07:26 PM
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At 240 volts your just a hair under 21 amps so you will be fine with your existing circuit.
 
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Old 03-09-09, 08:07 PM
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Yes, 240V. Knew I'd leave something out. (Although I haven't seen too many 5000W-120V heaters lately)

I've been given conflicting info relating to breaker size & wire size. I understood 10/3 & 30A would be OK. Majority rules.
Thanks Ironhand.
 
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Old 03-09-09, 09:39 PM
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Yes, your #10 and 30A breaker is good for a 240V heater up to 5760W.

(Although I haven't seen too many 5000W-120V heaters lately)
Sometimes people buy used commercial heaters which are designed for 208V, 277V, etc.
 
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Old 03-09-09, 10:22 PM
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Not 10-3, 10-2. No neutral needed on a 240v appliance.
 
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