They do, at least 6kW for sure (208, 240, or 480 three phase)But if the heater were three phase, 480 volts (do they make such things?),
The question cannot be answered without knowing the voltage. Dennis used the most probable value of 240. But if the heater were three phase, 480 volts (do they make such things?), the current would be under 7 amps, and a #12 would be acceptable.
Here are specs for a light-duty commercial Rheem having 3, 4, 4.5, 5, & 6 kW elements:They do, at least 6kW for sure (208, 240, or 480 three phase)
They do, at least 6kW for sure (208, 240, or 480 three phase)
No, but, if you hum a few bars . . .Do you know how difficult it is to get 277volt heaters?
I have seen many a condo or apartments wired with # 10 Al. serving water heaters. How did that pass?