Shower circuit design.

mapj1: 
 

I agree (though I missed it in the original Q too) that anyone claiming the competence to  install an 8.5kw shower should be up to division of watts by 230 to get a current, and selecting the rest of the parts to match or exceed that. It quite possibly will not trip on a 32A breaker but that is not a design process that withstands proper scrutiny.

Mike.

 

 

Quite, 8500 divided by 230 is hardly a difficult sum particularly for people who have a mobile phone at hand to use as a calculator.

On the way out of the house today a threw the question at my wife ” If you have a shower which uses around 37 amps do you need a 32 amp circuit breaker or a 40 amp circuit breaker?” and without any training in electrical installation at all  she got the answer right and said 40 amps.

With all due regard to my wife and well done her for getting the right answer, it’s not a difficult question.

mapj1: 
 

I agree (though I missed it in the original Q too) that anyone claiming the competence to  install an 8.5kw shower should be up to division of watts by 230 to get a current, and selecting the rest of the parts to match or exceed that. It quite possibly will not trip on a 32A breaker but that is not a design process that withstands proper scrutiny.

Mike.

 

 

Quite, 8500 divided by 230 is hardly a difficult sum particularly for people who have a mobile phone at hand to use as a calculator.

On the way out of the house today a threw the question at my wife ” If you have a shower which uses around 37 amps do you need a 32 amp circuit breaker or a 40 amp circuit breaker?” and without any training in electrical installation at all  she got the answer right and said 40 amps.

With all due regard to my wife and well done her for getting the right answer, it’s not a difficult question.