jus finished 4 xmas,last job was to add extra 2g sockets in school,these were supplied off local circuits.Doin the test procedures,even wiv our non trip ELI meter the rcd tripped,so i attempted to by pass rcd & then test.We all no this isnt the easiest thing 2 do,the rcd gave a little bang & tripped,reset & tried again,exactly the same thing happened,now doin it twice was fine but theres no way a third time,reset & ok.Any1 --- across this the, rcd is a BS4293,63 amp 30ma mayb 15 -20 years old MK.So.. no test were performed on circuit,this was noted,but u can jus imagine when new term starts,it was ok untill u lot came,hav a gud 1 ta ra bab