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Rotary isolator sizing

Baldyhugh

Hi

is it acceptable to use a rotary isolator which is a larger rating than required eg. Using a 32a isolator for a 16a or 20a circuit? Dependant on manufacturer, the higher rated ones are physically larger and offer more space inside for wiring. With my wholesaler there is only a couple of pounds difference in price, so it seems sensible to use the larger one but was curious if there was a regulation reason why I shouldn’t.

 

thanks

 

Peter

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  • 0

    I always go for the larger size, simply because terminating a 6.00mm multicore SWA into a 32A rated one is next to impossible, so up a size we go. Makes life easier all round.

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    I always go for the larger size, simply because terminating a 6.00mm multicore SWA into a 32A rated one is next to impossible, so up a size we go. Makes life easier all round.

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