B
benefic
I've been asked to connect up a new prefabricated garden office for a customer. I've run an SWA supply out from the house prior to where the shed(whoops - office!) is going. So far so good. I return after the office has been built to connect up and test every thing. the shed company pre -wire it, so it should just be a case fit the small CU, put the socket fronts on and connect the lights. I first noticed a telephone cable that ran from a phone socket up to the hole for the CU - no grade seperation there! Good job the customer didn't want to use the phone point. My big problem is the use of polystyrene sheet insulation. The shed people have run their pvc 2.5mm 3 core flex up against the insulation. This will damage the cable eventually. I am expected to sign this wiring off and issue a certificate. How soon does pvc degrade when next to polystyrene? Will the cable outlast the shed? I don't really want to get into a 3 way slanging match between me the customer and the shed firm, but don't think I can sign this off. The company is quite big and presumably they have had lots of other people sign off their work. Have I missed something or does nobody else look behind the backing boxes?
