A new MCB box fitted because of a new kitchen installation was checked off with the exception of the garage (it had a twin 13A plug broken at the time).
I obtained a new one today and fitted it but it trips out anytime anything tries to draw current from it. Even a hand lamp. I can see no reason for it. The house was built about 17 years ago and was empty until we moved in 15 years ago. Yes middle of the slump etc.
Cable for the garage was left outside and was unfused. It was fed to the garage under patio slabs through alkathene tubing and suitably proofed against the ingress of water.
Any ideas anyone?