ring main fault

[jimmylaud]

hi had a friend on the phone tonight wondering about his down stairs ring blowing the fuse he says he had a old meggar lying about and tested insulation with everything unplugged and the cables dissconected from the board and he had a dead short between live neutral and earth what do you think is the best way to repair dissconect at all sockets split the ring and test as you go to find the faulty leg or what ever is causing the fault? thanks alot in advance

 

[kung]

hi had a friend on the phone tonight wondering about his down stairs ring blowing the fuse he says he had a old meggar lying about and tested insulation with everything unplugged and the cables dissconected from the board and he had a dead short between live neutral and earth what do you think is the best way to repair dissconect at all sockets split the ring and test as you go to find the faulty leg or what ever is causing the fault? thanks alot in advance

Hi Jimmy
Discon ring split in middle or ish then test both legs find faulty leg and repeat with that leg ie split that leg in middle and con or ins test keep repeating untill offending fault found ! sounds like DIY damage or poss our old rodent friends doing overtime.
Regards
Kung.

 

[SirKit Breaker]

Last time i had this it was intermittent and turned out to be a socket hidden away behind washing machine. The machine had been vibrating against the plug which over time loosened the metal back box which had no grommets fitted and cable chaffed through. took about 4 hours to sort if i recall.

Good Luck

 

[jimmylaud]

thanks alot for that went and had a look tonight and the wiring was a mess basically found when you moved the ring main cables at the board the insulation reading would improve but not enough slack to cut back and make off again so left it with the fuse holding but told him think we sholud be replacing the ring downstairs ring along with the main board old wylex board 3036 fuses and sort out the bonding because its 6mm what do you guys think?

 

[steamboatwilly]

thanks alot for that went and had a look tonight and the wiring was a mess basically found when you moved the ring main cables at the board the insulation reading would improve but not enough slack to cut back and make off again so left it with the fuse holding but told him think we sholud be replacing the ring downstairs ring along with the main board old wylex board 3036 fuses and sort out the bonding because its 6mm what do you guys think?

Crimp a new section of 2.5mm to extend the ring at the CU then test again? If it's sound there's no need to replace the whole RFC.

Yeah, the CU is a customer for a local skip and the main bonding needs replacing.

 

[johnnyb]

I can feel a rewire coming on.

 

[jimmylaud]

thanks again will give that a try with crimping a new bit off 2.5 on and see what happens