main cut out blowing

[robbie t]

why would a suppliers main cut out fuse an old type 60 / 80 blow . just installed a socket i isolated the whole fuse board added a new socket spur off the ring ,tested R1 -R2 and insulation resistance all expected values .turned main isolater back on at the fuse board and there was no power ....... any idears

 

[telectrix]

tired fuse.

 

[truckster]

Is there power to the top of the switch?

Could be a dodgy isolator on the board, if you blew the serice fuse I think you would be aware of it by the banging sound

 

[SparkyJoe]

tired fuse.

lolol.

 

[kenny james]

what type of consumer unit is it? old wylex 3036 or circuit breaker 60898 type?

 

[drew35]

It happens sometimes if you don't progressively switch all the loads back on, especially if its an ancient old fuse. I would imagine its happened to all of us, well to me at least, usually at about five to five on a Friday! Hmm decision time, do I cut the seal and replace it, or do I call out the DNO and wait four hours?

 

[Dunc]

Possible main switch issue, large power surge when turning back on (unlikely though) or you really f****d up somewhere! Guaranteed if it were the last one you would be able to find the fault without the need for a test meter, the scorch marks and smell of burning would be the easy bit to find!

 

[robbie t]

no banging sound was heard no power to digital suppliers meter so checked continuity across cut out fuse as safty tags already being remove and fuse had blown was only a one bedroom flat not occupied no load drawn when turning main switch back on . can cut out fuses deteriate ?

 

[robbie t]

was an old rewirable wooden back box fuse board .

 

[telectrix]

.

hope you pulled the fuse before doing the continuity check...tired fuses can just fail when you switch a load on to them. if the seal is missing and you have a spare fuse, bung it in ( observing all safety precautions, no load on installation when you put the fuse in, etc. )

 

[robbie t]

one doesnt have a spare fuse lol why on a friday afternoon lolarty:

 

[telectrix]

one doesnt have a spare fuse lol why on a friday afternoon lolarty:

you must have a 2" nail floating about in your kit, surely.

oops, for a moment, thought you were a kitchen fitter.

 

[robbie t]

lol no been in the trade for 10 years now never had this happen or even heard so i though i would share my experience to searce for possible answers..........

 

[telectrix]

have found loads in industrial installations, just failed, no signs of overload.just old and tired. bit like me after 40 years in the trade, won't take much to finish me off. LOL.

 

[robbie t]

im only just starting and i have enough already lol why does a simple job turn in to a bitch i dont mind on a monday morning dont get me wrong lol not when its pub time lol ............ thanks for comments