what is it with some sparks and wiring up heating

[plumben]

I have a job call out tomorrow where his electrics trip when he switches on heating/hot water. I had a quick look as i was passing and the situation is... Pump is new and the 3 port is working fine (visually) there was no tripping and it was all working fine? Next day, tripping again? Im a new combi man, not really into this sort of stuff but want to know more. This guy is sound and we get on, dont want to let him down or make myself look like a ****.
Can anyone offer any non abusive or rude advice on further checks etc?
Thanks

I'D surgest you post your own new thread on this matter as this post if from 2011 most people will see that and not even bother looking at your post

 

[ShaunCorbs]

I have a job call out tomorrow where his electrics trip when he switches on heating/hot water. I had a quick look as i was passing and the situation is... Pump is new and the 3 port is working fine (visually) there was no tripping and it was all working fine? Next day, tripping again? Im a new combi man, not really into this sort of stuff but want to know more. This guy is sound and we get on, dont want to let him down or make myself look like a ****.
Can anyone offer any non abusive or rude advice on further checks etc?
Thanks

what trips the mcb or the rcd if rcd then power is getting to the earth (around 30mv to trip)

 

[Captain.rick]

what trips the mcb or the rcd if rcd then power is getting to the earth (around 30mv to trip)

Trips rcd. Do you think it could be pcb? The fuses dont blow on spur

 

[GasmanxxxR1]

Check the fan first, what boiler is it

 

[Captain.rick]

Check the fan first, what boiler is it

Ok mate will do, its a baxi solo old big thing 🙂 probably rotten inside they normailly are.

Was it 50-100 ohms a good fan, can't remember now, usually when they go they stink and melt a bit (especially Worcester bosch combi)

 

[Jay The Plumber]

a lot of this thread rings true.. a lot of guys only know combi's and old gits like me have to sort the older systems out electrically and then the sparkies are confused by relays or 3 way valves 🙂

I have been trying to get to the bottom of exactly what extent or wiring is 'allowed' - even under the competent persons scheme when it comes to plumbers wiring in their own work.. anyone know?

 

[ShaunCorbs]

a lot of this thread rings true.. a lot of guys only know combi's and old gits like me have to sort the older systems out electrically and then the sparkies are confused by relays or 3 way valves 🙂

I have been trying to get to the bottom of exactly what extent or wiring is 'allowed' - even under the competent persons scheme when it comes to plumbers wiring in their own work.. anyone know?

you can only wire to a fused spur/ connection unit unless your part p / 17th ed then you can do what you like

but if in a bathroom you can't do anything unless your part p / 17th ed

 

[joni os]

Intermittent tripping of RCD difficult to find. In one case straightening out wiring cured the problem, ( It tripped daily, and now hasn't tripped for 10 months). If the obvious can't be found leave it to an electrician who can check the RCD. As well as tripping at 30ma there is lower a currant at which it should not trip.

 

[Captain.rick]

Intermittent tripping of RCD difficult to find. In one case straightening out wiring cured the problem, ( It tripped daily, and now hasn't tripped for 10 months). If the obvious can't be found leave it to an electrician who can check the RCD. As well as tripping at 30ma there is lower a currant at which it should not trip.

Thanks mate, thats what i think ill do. Cheers for the help and advice to all too

 

[DaveTidy]

Most older Plumbers I know are fine on wiring and diagnoses of fully wired Y and S plans.
Newer Combi installs are a piece of cake (L,N,E,SL).

I'm with Halesowen on all new installs I do now, its just easier and quicker to quote for a chronotherm wireless.

I must admit to being stumped a couple of times on very old systems that have no 10 way and the timer was used as the junction box.
I understand how the system works but tracking the wiring down can be a pig of a job and sometimes its quicker to just disconnect the lot and rewire to a 10 way (as there are so many different ways of doing it).

I think the main problem is most plumbing courses skip over the electric side (and electrical legislation) as a lot of the big company's have an electrician following around connecting after the install and for a plumber its becoming a dieing art?

These guys seem to be building a heating wiring diagrams and manuals website slowly (I see it's not finished until end of April) so it'll be interesting how many diagrams end up on there..

Look at the heating wiring diagrams on the top menu