Electrical Rating help please!

[thediynovice]

Hi

I need to replace the shower in our bathroom. The old shower was an Aquatron EII 7kw shower, which was being fed by 4mm2 cable.

The shower I bought to replace it is a Triton Ivory 2 rated at 8.5kw (although the packing states 7.8-8.5kw).

My questions are:

1) Do I need to replace the cabling to 10mm2?

2) The consumer unit downstairs feeds the shower, but the largest fuse on any of the fuses is 30A. Am I right in thinking that this isn't enough?

3) The main switch rating on the consumer unit is 63A. Is this too low? Do I need to get the consumer unit replaced?

Thanks in advance guys

 

[Scoby_Beasley]

1) Maybe not as the 8.5kw is at 240volt, we are (or should be) 230volt so your shower is 7.8kw
2)If I'm right in (1) the shower will draw 33+ amp
3) Don't put the oven on if your planning a shower (We've got a 60amp mains, no probs yet )

 

[delmel]

Should never have had 4mm in the first instance. Depends on your distance but certainly 6mm at very least, but if your replacing go for 10mm for future upgrading