Just finished extension including wiring all tied back to new CU inside garage. Wiring has all been inspected by registered electrician and he is happy. (okay I'm only at first fix stage so far but getting there and he is happy so far).
Electrician told me to use 10mm2 t&e to supply the new CU.
I spoke to another electrician and was told to tee-off the existing meter tails (using Henley blocks) to supply the new CU.
Cable length required between meter and new CU is about 5m - albeit they are pretty much back-to-back through a granite wall.
My question is...
Can I put the recommended 10mm T&E into the Henley block without it first going through an RCD, as obviously te bullet fuse is rated at 100A (far more than the 10mm T&E), so what protection does my 10mm cable have?
If I have to take it from the existing CU instead of from the Henley, then I will likely have to rewire something as I don't have enough free space in the existing CU and I don't really want to disturb the existing house wiring if I can help it at all.
PS I have an isolator switch fitted to the output of the meter.
thanks
Electrician told me to use 10mm2 t&e to supply the new CU.
I spoke to another electrician and was told to tee-off the existing meter tails (using Henley blocks) to supply the new CU.
Cable length required between meter and new CU is about 5m - albeit they are pretty much back-to-back through a granite wall.
My question is...
Can I put the recommended 10mm T&E into the Henley block without it first going through an RCD, as obviously te bullet fuse is rated at 100A (far more than the 10mm T&E), so what protection does my 10mm cable have?
If I have to take it from the existing CU instead of from the Henley, then I will likely have to rewire something as I don't have enough free space in the existing CU and I don't really want to disturb the existing house wiring if I can help it at all.
PS I have an isolator switch fitted to the output of the meter.
thanks