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Used commercial dishwasher rcd trip rating.

hertzal123
The customer has asked me to connect the above to an existng 3ph,32A supply.The unit will be next to a s/s sink.

The unit will be hard wired to an isolator.Wondered if a 30ma rcd is required or 100ma would be better due to leakage

current when the elements are cold.

                                                   Regards,Hz
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  • 0
    Check manufacturer's instructions.


    Some require the machine to be connected via a plug and socket-outlet, in which case BS 7671 will require a 30 mA RCD ... HOWEVER, some machines have high protective conductor currents, and this may trip the RCD (you will need to get the customer's Duty Holder to sort this out via a suitable risk assessment to satisfy 411.3.3). Where the machine has high protective conductor currents, additional earthing may be required (the machines may meet BS EN 60204-1 and not BS EN 60335-series, in which case this may not necessarily be labelled on the machine itself).


    With some machines, the manufacturer states the protective devices that are to be used, and this may include RCD.


    It's not possible to second-guess the manufacturer's installation requirements.
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  • 0
    Check manufacturer's instructions.


    Some require the machine to be connected via a plug and socket-outlet, in which case BS 7671 will require a 30 mA RCD ... HOWEVER, some machines have high protective conductor currents, and this may trip the RCD (you will need to get the customer's Duty Holder to sort this out via a suitable risk assessment to satisfy 411.3.3). Where the machine has high protective conductor currents, additional earthing may be required (the machines may meet BS EN 60204-1 and not BS EN 60335-series, in which case this may not necessarily be labelled on the machine itself).


    With some machines, the manufacturer states the protective devices that are to be used, and this may include RCD.


    It's not possible to second-guess the manufacturer's installation requirements.
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