Hello all,
I'm confused regarding sizing circuit breaker for a non-simultaneous water heater rated for 3 phase,208V, 4.5kw. The exact model is den-40 by AO-smith. I was not able to find FLA of this water heater in their specs.
Since it is non-Simultaneous, doesn't it act as single phase? so 4.5kw/208 = 21.6 x 1.25 = 30 Amp breaker, 3 pole
If we completely size it as a 3 phase, wouldn't that be only done for a simultaneous ones only = 4.5/(1.73*208) = 12.5 * 1.25 = 20amp breaker, 3 pole
Because i looked at FLA amperage by different manufacturer. and the non-simulatinoes 3 phase water heater were being calculated as single phase, since not all heaters are turning on at same time.
Any info on this would be greatly apprecitated. Thank you!
I'm confused regarding sizing circuit breaker for a non-simultaneous water heater rated for 3 phase,208V, 4.5kw. The exact model is den-40 by AO-smith. I was not able to find FLA of this water heater in their specs.
Since it is non-Simultaneous, doesn't it act as single phase? so 4.5kw/208 = 21.6 x 1.25 = 30 Amp breaker, 3 pole
If we completely size it as a 3 phase, wouldn't that be only done for a simultaneous ones only = 4.5/(1.73*208) = 12.5 * 1.25 = 20amp breaker, 3 pole
Because i looked at FLA amperage by different manufacturer. and the non-simulatinoes 3 phase water heater were being calculated as single phase, since not all heaters are turning on at same time.
Any info on this would be greatly apprecitated. Thank you!
