LED'S keep tripping the RCD when switched off?

[Pedro1875]

Hi everyone,

I have recently replaced 10 old strip lights in a church hall with new LED strip lights.

I ran an insulation test and all seemed good. I switched them on and all seemed good.

I had a call from the vicar to say that they are not working so went back to site to find the MCB had tripped. I retested and all was good. When I reset the MCB they come on. The light switch works fine. They go on and off. After an hour or two the MCB has tripped again.

Something Im missing? They are 60 watt equivalents and I have checked each connection to make sure there is no issue.

Bit at a loss now as to why this keeps happening. The Cons unit is pretty old and Ive tried a different breaker to rule out that. Im guessing it is insulation but not sure as to why when my readings are >500.

Thoughts appreciated

Thanks

 

[Charlie_]

Are the MCBs type B?

 

[Pedro1875]

yes

 

[buzzlightyear]

is the micc cable in ,and what are the led driver transformers rated at .

 

[Strima]

What do the manufacturers recommend for number of lights Ona circuit?

Also thread title says RCD yet you say MCB, which is it?

 

[buzzlightyear]

new LED strip lights.

what kind are they .

 

[littlespark]

is the micc cable in ,and what are the led driver transformers rated vat.

Are you just trying to confuse things, Buzz?

I’m going for 1 or more faulty new fittings. If cables are testing ok, must be whatever is connected.
Are there any other lights or circuit branches off the same mcb? Maybe not your new lights at all.

 

[SparkyAndGeorge]

Have you tried testing at 1000v and for 30 seconds or more?

 

[buzzlightyear]

yes

yes what?

 

[Pedro1875]

What do the manufacturers recommend for number of lights Ona circuit?

Also thread title says RCD yet you say MCB, which is it?

Just looked and it recommends 5 - FFS! And yes I ballsed up - was meant to write MCB in the title

 

[Pedro1875]

yes what?

Yes the MCB's are B type

 

[buzzlightyear]

Are you just trying to confuse things, Buzz

in order to help the op we need has much information has possible to pick apart what the fault is .

 

[Pedro1875]

Are you just trying to confuse things, Buzz?

I’m going for 1 or more faulty new fittings. If cables are testing ok, must be whatever is connected.
Are there any other lights or circuit branches off the same mcb? Maybe not your new lights at all.

Nothing connected as far as I can see - its once cable to a JB then splits into two - 5 down one side of the hall then 5 down the other.

 

[Pedro1875]

what kind are they .

LAP 60w

 

[buzzlightyear]

possible the one electronic starts has a fault .

 

[Strima]

Just looked and it recommends 5 - FFS! And yes I ballsed up - was meant to write MCB in the title

Looks like you'll need to split the circuit then.

 

[buzzlightyear]

Looks like you'll need to split the circuit then.

if the op has replace the 10 for led why would he put and a splitting them to a different circuit . he must have a fault on one of the lap C88p gear .

 

[buzzlightyear]

LED Batten Fitting 60W 1500mm 7200lm - https://www.toolstation.com/led-batten-fitting/p66469?searchstr=led%20batten I use these.

 

[Charlie_]

What is the total load on the respective mcb?
Possibly might need to change it for a c type

 

[Strima]

if the op has replace the 10 for led why would he put and a splitting them to a different circuit . he must have a fault on one of the lap C88p gear .

See his response In post #10, manufacturers recommend five fittings per circuit.