27,000 watts divided by 240 volts is 112.5 amps.Can anyone tell me if I can put this on a 100 amp panel?
There are plenty of spaces and it takes 3-240v 40-amp breakers. Its a 850 sq. ft. condo that it will be installed in.
If you could point me in the right direction that would be good.
Which would lead to:27,000 watts divided by 240 volts is 112.5 amps.
# of breakers has nothing to do with it. If full load is called for, 112.5 amps, you just exceded your main breaker compacity by 12.5 amps just for hot water. Nothing left for anything else.Ya I did the ohms law calculation but was wondering if the 3-40 amp breakers made a difference vs. 1-125 amp breaker.
Correct, I was hoping the original poster would see that the demand for this water heater would exceed the rating of the panelboard.Which would lead to:
408.30 General. All panelboards shall have a rating not
less than the minimum feeder capacity required for the load
calculated in accordance with Parts II, III, IV, or V of Article
220 as applicable
Agreed, 3 40 amp breakers does not change the demand of the water heater.# of breakers has nothing to do with it. If full load is called for, 112.5 amps, you just exceded your main breaker compacity by 12.5 amps just for hot water. Nothing left for anything else.
What is wrong with a 40 amp for a 37.5 amp non-continuous load?If you take the 27kW, divide by three, you get 9kW per heating element. At 240V that works out to 9kW/240V = 37.5A, multiplied by 1.25 and you get 46.87 or 50A breaker.
Exactly where do the 40A breakers work into the equation?
If that were the case, there'd be no need for multiple supply circuits.I mean I know how to do simple ohms laws but I was thinking the same thing about how they may not run simultaneously.
You're talking about heating fast-moving water very rapidly. The elements are definitely running simultaneously.They changed this heater from 1-125 to 3-40amp breakers recently and I'm not sure why. I cant find the install pdf for this unit yet.Hopefully all three elements don't run at the same time for better efficiency or more consistent heating or something.