I am having a Pergola installed in my garden with two 2kw heaters and eletric blinds. I have run a 4mm 3 core swa over the 18m length from the CU to the site. I have terminated that 4mm swa in an IP rated box and taken three 2.5mm SWA's across to the Pergolas "power leg", one cable for each heater and a seperate one for the blinds. The 4mm SWA will be run from a dedicated 30amp RCBO. the Pergola installers now tell me that thye simply connect the cables and wont be nstalling isolators. my problem i sthat the cable shave now been buried under a new patio so i have little play in them. i guess i should install three waterproof fused isolator spurs to each of the 2,5mm SWA's as they are outside but a si can only find 1 gang spurs i fear i dont have enough play in the cables to now install them. Are there multi gang fused spurs available or could I install a single isolator inside the main building in the 4mm feed from the consumer unit?