L
LlandrilloSpark
Can someone offer a solution to this RCD trip?
I've been doing some work at my sister's 112 year old house, it started with me installing a split load board but soon became obvious that the wiring wasn't up to scratch anywhere in the house, I.e two core feeding socket outlets no cpc!
The kitchen extension has it's own ccu with two 15A and one 5A rewirable for power and lights, this is fed via a 10mm t&e with contactum 32A breaker on the rcd side, id say the cable is a good 40 years old, the day after installation the rcd tripped, the kitchen supply was the only circuit on it at the time.
Due to a new kitchen being fitted, i now have been asked to rewire the whole kitchen, I have fitted a new proteus 4 way with rcd main switch, one 6A lighting circuit and two power, the cooker is still on the old board.
When I switched on the mcb in the main board the new rcd main switch tripped straight away, this was without the cable under any loading and all the mcb's in the new ccu switched off.
I have tried the following, I disconnected the bus bar and it still tripped, I but the neutral tail straight into the bar and it held untill I switched on any of the 3 circuits then it popped, I even bypassed the whole rcd putting the neutral tail in the bar and the line into the mcb's, the circuits worked fine and I got good Zs on the sockets, the pre commision tests came back fine on the new kitchen , all insulation resistance over 550 meg ohm.
Can the RCD pick up something down stream?, is it the supply cable?, i was thinking about bringing a new 4mm earth from the met to the new ccu, also should I dissconnect the new circuit neutrals one by one and c if I can pinpoint that way. Or is it back to the main switch and stuff the rcd.*
Help appriciated
Lighting in utility has a small fluerescant fitting on it
Cheers
I've been doing some work at my sister's 112 year old house, it started with me installing a split load board but soon became obvious that the wiring wasn't up to scratch anywhere in the house, I.e two core feeding socket outlets no cpc!
The kitchen extension has it's own ccu with two 15A and one 5A rewirable for power and lights, this is fed via a 10mm t&e with contactum 32A breaker on the rcd side, id say the cable is a good 40 years old, the day after installation the rcd tripped, the kitchen supply was the only circuit on it at the time.
Due to a new kitchen being fitted, i now have been asked to rewire the whole kitchen, I have fitted a new proteus 4 way with rcd main switch, one 6A lighting circuit and two power, the cooker is still on the old board.
When I switched on the mcb in the main board the new rcd main switch tripped straight away, this was without the cable under any loading and all the mcb's in the new ccu switched off.
I have tried the following, I disconnected the bus bar and it still tripped, I but the neutral tail straight into the bar and it held untill I switched on any of the 3 circuits then it popped, I even bypassed the whole rcd putting the neutral tail in the bar and the line into the mcb's, the circuits worked fine and I got good Zs on the sockets, the pre commision tests came back fine on the new kitchen , all insulation resistance over 550 meg ohm.
Can the RCD pick up something down stream?, is it the supply cable?, i was thinking about bringing a new 4mm earth from the met to the new ccu, also should I dissconnect the new circuit neutrals one by one and c if I can pinpoint that way. Or is it back to the main switch and stuff the rcd.*
Help appriciated
Lighting in utility has a small fluerescant fitting on it
Cheers
nicked as in stolen
