Hi all looking for some advice working on a job adding on a couple of sockets and spurs for w/m.& heat / co alarm to existing c/u in garage which is getting supplied by 10mm t&e from house c/u on its own garage c/u 40a mcb anytime the washing machine gets used it is by passing 12way wylex c/u and tripping the garage c/u in the house all circiuts are testing fine iam lead to believe the 10mm T&E is undergroud in ducting everything is working fine until put some kingd of load on ie w/m kettles .any ideas would be much appreciated thanks.