A.O. Smith DSE-5 Service Handbook page 13

Ohms Law
A law that explains the relationship between voltage, current and resistance. The law states
that the electric current flowing through a conductor is equal to the voltage divided by the
resistance. The following equations further explain ohms law.
V = Volts
(electrical pressure)
A = Amps
(electrical flow/current)
O = Ohms
(resistance to electrical flow/current)
W = Watts
(rate or amount of electricity used)
Ohms Law applied to single phase power - each loop of a six wire element:
V ÷ A = O W ÷ V = A
Ohms Law applied to three phase power - each wiring lead to a three wire element:
0.577 x W ÷ V = A
Service Note: See Heating Element Ratings on page 23 to determine the voltage and KW
rating of a heating element.
Servicing should only be performed by a Qualified Service Agent
OPERATION & SERVICE
V ÷ O = A V x A = W
11
A x O = V W ÷ A = V
V x A x 1.73 = W