I will be building a garden office shortly. It will be 5 metres from the house and I'd like advice on the supply cable please.
I think I have two options:
Run 15 metres of 2.5mm2 SWA from the consumer unit in the house to the CU in the garden building
Run 5 metres 2.5mm2 SWA from the garden building to a Wiska box on the house wall then 10 metres of 4mm2 T+E to the house CU
Are there any strong reasons for choosing one or the other? Is it practical to connect SWA to a consumer unit?