Adequate service for new water heater?

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Old 03-01-03, 05:49 PM
K
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Adequate service for new water heater?

My water heater just went out. It was a 4500 watt/240 volt unit on 10 guage wire/30 amp circuit. I was looking at a 5500 watt 240 volt unit at lowes and was advised by their electrical department that I would have to have a 50 amp/6guage wire circuit to service it. (Lowes calculated by dividing 5500 watts by 120 volts, shouldn't it have been 240 volts). I looked at another 5500watt/240 volt heater at Sears in which the specification indicated that a 30 amp 10 gauge wire circuit was adequate. Could someone advise me on the code for a 5500 watt unit. Thanks
 
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Old 03-01-03, 06:16 PM
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80% of the circuit would be 5760 watts, so the 10 guage 30 amp circuit should serve 5500 watts numerically. 240 volts by 30 amps = 7200 watts
 
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Old 03-01-03, 07:00 PM
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It's just incredible how much misinformation you can get in the aisles of a home improvement center. As chfite said, a 5500 watt water heater will be fine on your existing wire and circuit.
 
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Old 03-01-03, 07:16 PM
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I wonder if they stocked a 60 A single pole breaker?
 
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Old 03-02-03, 07:41 AM
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Originally posted by John Nelson
It's just incredible how much misinformation you can get in the aisles of a home improvement center. As chfite said, a 5500 watt water heater will be fine on your existing wire and circuit.
I'll wager that they're not selling many 5500 watt heaters.
 
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