Mike Lamb Posted June 6, 2022 Report Share Posted June 6, 2022 What would be an appropriate sized breaker for this WH? Quote Link to comment Share on other sites More sharing options...
Mike Lamb Posted June 6, 2022 Author Report Share Posted June 6, 2022 I am replacing a 2 pole 30 amp breaker - if that is the right size - for this tank. Murray panels and breakers are discontinued. Need help as to what specific breaker should I get? This is beyond my expertise. Quote Link to comment Share on other sites More sharing options...
Marc Posted June 6, 2022 Report Share Posted June 6, 2022 30 Amp. Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted June 7, 2022 Report Share Posted June 7, 2022 Quote What would be an appropriate sized breaker for this WH? 23.4 amps. You won't find one, so 25 Amps. Might not find one, so 30 amps. You'll find one. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted June 7, 2022 Report Share Posted June 7, 2022 Like Bill said, a 25- or 30-amp breaker is fine - IF you have 240-volt power. I'd use a Siemens brand breaker. They've owned the Murray line for quite a while. Quote Link to comment Share on other sites More sharing options...
Mike Lamb Posted June 7, 2022 Author Report Share Posted June 7, 2022 Thanks. Quote Link to comment Share on other sites More sharing options...
mtwitty Posted June 27, 2022 Report Share Posted June 27, 2022 Both 25 and 30 amp are compliant if the supply is 240 volts. If the supply is 208 volts, only a 25 amp breaker is allowed. Quote Link to comment Share on other sites More sharing options...
Marc Posted June 27, 2022 Report Share Posted June 27, 2022 Why? Assuming the OCP device is sized to protect the circuit conductors. Quote Link to comment Share on other sites More sharing options...
mtwitty Posted June 27, 2022 Report Share Posted June 27, 2022 1 hour ago, Marc said: Why? Assuming the OCP device is sized to protect the circuit conductors. The NEC states that the OCD is "not to exceed" 150% of the rated current. 422.11(E)(3) At 208 volts, that current would be 24.4 amps. The next standard size breaker is 25, which is the only one allowed in this scenario. Quote Link to comment Share on other sites More sharing options...
Marc Posted June 27, 2022 Report Share Posted June 27, 2022 After all these years..I had no idea. Quote Link to comment Share on other sites More sharing options...
mic20 Posted August 2, 2022 Report Share Posted August 2, 2022 (edited) I installed the same WH I bought from LINK DELETED. They helped me install it and the size of the circuit breaker is 30 amp. Edited August 2, 2022 by Bill Kibbel Quote Link to comment Share on other sites More sharing options...
Bill Kibbel Posted August 2, 2022 Report Share Posted August 2, 2022 5 hours ago, mic20 said: I installed the same WH I bought from LINK DELETED. They helped me install it and the size of the circuit breaker is 30 amp. What's the voltage there in Romania? Quote Link to comment Share on other sites More sharing options...
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