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Old 08-26-2013, 01:45 PM   #16
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Water Heater Breaker


in the 70 was the water heater considered a continuous load?? maybe it wasn't so a 20a was legal. i also have a 20A for my 4500w heater it had never trip

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Old 08-26-2013, 01:55 PM   #17
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Water Heater Breaker


It is far more likely that your house had a 3500W heater and the breaker was appropriately sized. When the 3500W was replaced, they upsized to 4500W and did it without replacing the breaker.
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Old 08-26-2013, 02:05 PM   #18
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in the 70 was the water heater considered a continuous load??
It's still considered a continuous load, that's why we say 4500/240=18.75+25%(for continuous load)=23.4375 amps.

Therefore, 25 or 30 amp breaker is acceptable.

I just hope the OP has hot water by now
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Old 08-26-2013, 02:07 PM   #19
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in the 70 was the water heater considered a continuous load?? maybe it wasn't so a 20a was legal. i also have a 20A for my 4500w heater it had never trip
It's been required to be considered a continuous load for as long as I've known.

At the same time I see plenty of them on 20A breakers. Just like I see dryers on 20A breaker and dryers wired with 10/2NM. All code violations but will still work.
Just because something is code required does not mean hacks will follow those codes. Usually that's because they don't know or care about codes, as long as it works.
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Old 08-26-2013, 07:20 PM   #20
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I just hope the OP has hot water by now
Sure do, a quick trip to Lowe's and I was in business. Thanks all.

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