Thanks for that.
The electrcian is niceic Approved contractor,NiCEiC demestic installer, The shower has been wired straight back to the cunsumer unit to its own fuse. the shower is a electrical heater type.
I recently had a Greda 550c shower fitted by a electrician but I have a problem . When I turn my kitchen light on the shower in the bathroom makes a slight bump ,the lights on the front of the shower flash on for a few seconds and the shower omits a bit of water for a few seconds. This does not...