Richard Baldwin
Hey Matt, Given that it has been tested prior to the plastering I would assume it is wet plaster causing the problem. Best to let it dry and see if the problem persists. The RCD functioned as it should have to prevent any serious damage, best to investigate behind the cooker switch after the plaster has dried to see if there is any damage to the insulation of the cables or indeed the switch. In that case I would seek help from an approved and competent electrician to investigate and rectify any problems Hope this helps Thanks, Richard Baldwin (Trydanwyr Bright Spark Electricians)
