Rcd keeps tripping in mainboard
- Thread starter lingl9z
- Start date
williamocarroll1982
Member +
Hahaha, im the same lad. Spent my time in a factory with my head stuck in panels doing motor control and pneumatic valve control most of the time. Id say if I fitted 5 RCD in the past 7 years id be lucky lol. Im not too well up on domestic or even commercial for that matter, its all Industrial I did so.
lingl9z
Member +
Cheers for all the help people, got hold of the landlord and he sent in a sparky, I explained I narrowed it down to the kitchen sockets and he tested them and one had a 0.02 a dead load, so he removed that leg and said it won't trip now but down overload that ring until new year when they rewire it!
Shorty
Member +
Or a 20amp mcb would be fine for a 2.5mm radial wich it now is effectivly if he dropped a leg out between two points, if he left it on the 32 amp hes a nob as potentially you could pull to much down as 2.5mm radial is around 29amp max iirc. And just askin some one to not use heavy load is a risk in my eyes. All ways elliminate the possabillity of fault or danger. And going back slightly any cable buried less than 50mm in a wall must be rcd protected in acordence with 17th addition regs. I generaly use split load 10way boards as most people dont want to pay for 6-10 rcbo's in a cu. Only circuits not on rcd would be as stated earlier smokes, dedicated freezer supply, ect. On another slight note, it is dangerous not to be able to get to appliences plugs, as again new regs state that local isolation must apply to all appliences either by easy accsess to sockets or switched fused spurs. Saying that its not a fail on a pir test just would not comply to current regs so code 4 and would be recomended to be improved.
churcherj
Member +
do you think anyone cares tom?
J25GTi
Lifer
Is all of that basically exactly what I said earlier in the thread?
29a is only in perfect condition run in free air. De-rated your looking at 24/25a
Any cable not in mechanical protection must be rcd protected.
As for the freezers there is no need to improve as at the time it was installed it complied. As it does not comply now it does not make it dangerous etc. So a code 4 is the only code needing issued.
It did comply, it has never been dangerous and as long as it tests out okay there is no need for improvement
29a is only in perfect condition run in free air. De-rated your looking at 24/25a
Any cable not in mechanical protection must be rcd protected.
As for the freezers there is no need to improve as at the time it was installed it complied. As it does not comply now it does not make it dangerous etc. So a code 4 is the only code needing issued.
It did comply, it has never been dangerous and as long as it tests out okay there is no need for improvement
lingl9z
Member +
Not entirely sure tbh, he did say he was going to put something in just to be on the safe side and just never did it lol... would running a microwave / kettle (not both on at the same time and only for a short period) and a Freezer be okay on that? If not I'll get on to him to get back asap and sort it.
Thanks btw!
Thanks btw!
Shorty
Member +
As above, and j25gti my comment was in agreement with you i wasnt just trying to sound smart and was not suggesting it had to be improved just saying what we would mark it as on a periodic inspection. Was trying to reiterate as you said you mainly do pannels and i mainly do domestic these days.
J25GTi
Lifer
Seems like a right fool to me!
I would get him back asap.
A ring main is a 2.5mm cable in a loop. A 2.5mm cable is rated to 25ish amps. And a ring main worksd on a 32amp mcb.
So with out a leg connected it becomes a radial cct and only rated to 25amps. So it should have at a maximum 20amp mcb on it.
Otherwise its a fire risk etc!
I would get him back asap.
A ring main is a 2.5mm cable in a loop. A 2.5mm cable is rated to 25ish amps. And a ring main worksd on a 32amp mcb.
So with out a leg connected it becomes a radial cct and only rated to 25amps. So it should have at a maximum 20amp mcb on it.
Otherwise its a fire risk etc!
Shorty
Member +
as j25gti says he should either derate the mcb or better still renew the leg, but to remove it an fook off is a bit cowboy tbh. if theres not many sockets then derated to a 20a mcb will be more than fine and the cheaper option for the landlord but either one of the two options needs to be done.