Hi there, I was replacing a socket with the juice still on/circuit energized. Unscrewing and touching the live or neutral terminal wire with an insulated screw driver created a large spark thus tripping the RCD. Can anyone explain why this would happen?
One question and one answer Question, WHY was you doing it live?? Answer, you must have caused a short somehow, lucky for you it tripped before you did.
Many sockets have the earth bar strapping very close to the terminals - I would suggest you ignorantly shorted live or neutral to earth. WHY were you doing this with the circuit on? If it had a pair of cables, you are also open circuiting the rest of the circuit. What was in your mind? For example:
I know the juice should have been isolated from this circuit, but I was puzzled why this was occurring. I carefully tried it again as a test with the same result. Could there be a fault on the circuit/bonding?
If you are just touching the live with your screwdriver and it's tripping out, you may have a fault with the insulation on the screwdriver, so it is strongly advisable to stop trying it before you kill yourself.
You must have touched either the earth bar or the neutral at the same time as the live, that's the only possible explanation. Just think yourself lucky and don't do such stupid things in the future!
Is this a wind up? Have you never had an electric shock? I have had a two or three mains shocks when I was in my teens messing around with radios and mains energised speakers but I have not had one since and I am 67 now. As other posters have indicated if you want to kill yourself you are going the right way about it.
Poundland usually have a few good quality neon screwdrivers which may well help curtail your experiments a little quicker
Try the 99p shop - even cheaper but still the same high quality Always makes me laugh, anyone with an insulated screwdriver with a red and yellow grip is a competent electrician - myself included !
What a waste of money, My Grandad told me in the 1920's they often just licked their finger and gave it a quick dab to see if it was live and they were professional electricians.