Hi,
I am replacing an electric shower from a 9kw and can only find a new 9.5Kw replacement.
It is wired in a 6mm T&E plastered in the wall then running across the loft (which has very little insulation) into the CU which is about 6 metres away so only about a 10m run. So I make this reference method C
According to BS7671 Current Carrying Capacity of 6mm T&E Reference method C would allow a load of 47 amps.
The current shower is on a 40amp MCB and I am sure that this would be fine for the new shower as it is rated between 8.7 - 9.5Kw (37.8 - 41.3 amp)
The user manual advices 10mm cable and a 40/45 amp MCB. What is the opinion of other sparks.
I am replacing an electric shower from a 9kw and can only find a new 9.5Kw replacement.
It is wired in a 6mm T&E plastered in the wall then running across the loft (which has very little insulation) into the CU which is about 6 metres away so only about a 10m run. So I make this reference method C
According to BS7671 Current Carrying Capacity of 6mm T&E Reference method C would allow a load of 47 amps.
The current shower is on a 40amp MCB and I am sure that this would be fine for the new shower as it is rated between 8.7 - 9.5Kw (37.8 - 41.3 amp)
The user manual advices 10mm cable and a 40/45 amp MCB. What is the opinion of other sparks.