Good Afternoon
I am sure that there is an obvious answer to this question ?
With reference to the IEE Regulations when a 2.5 sq.mm ( typically used for a ring main ) is enclosed in wall ( and before applying other derating factors e.g. ambient temperature ) the current capacity of the cable is reduced to 18.5A.
Why is a ring main then typically protected with a 32A MCB ?
Many thanks.
I am sure that there is an obvious answer to this question ?
With reference to the IEE Regulations when a 2.5 sq.mm ( typically used for a ring main ) is enclosed in wall ( and before applying other derating factors e.g. ambient temperature ) the current capacity of the cable is reduced to 18.5A.
Why is a ring main then typically protected with a 32A MCB ?
Many thanks.