LEDs tripping type 2MCB!

[hoppy]

hi

I have recently done a job, replacing 17 down lights in a kitchen with 17 x 10w led down lights and replacing 7 under cabinet lights with 4 x led strip light kits (4 drivers).
They are on a type 2 mcb, the downlights are split across 2 switches and the under cabinet lights are on their own switch (it's a 4 gang switch), but the Mcb trips when the under cabinet lights are turned on, but not all the time. I have IR tested the cables, all above 100 mega ohms.
So I am a bit puzzled, could this be an over load / in rush issue?

Thanks

Craig

 

[dmxtothemax]

In rush or harmonics,
That many electronic supplies would produce lots of hash
Have you tried using another brand of driver ?
Try feeding the main supply thru a 1 to 1 isolation transformer
The iron core tranny will filter a lot of the hash out
And also reduce back EMF

 

[Deleted member 9648]

Depending on disconnection times being met change the type 2 mcb for a C/D curve, or a fuse. Some older DB's take cartridge fuse carriers as well as MCBs, Hager for example.

 

[Midwest]

I think its pushing the boundaries a bit, e.g. JCC installation instructions for their FGLED10, suggest limiting 'maximum no of fittings linked per circuit' to 14, on a C type 10a mcb.

So home owner switches on all the lights, like they do with one hand, will trip the mcb. What does the manufacturers of the down lights and stripe lights say? What's the combination of switching?

 

[Octopus]

What happens if the under cupboard lights are turned on (and the down lights are left off)?

 

[hoppy]

What happens if the under cupboard lights are turned on (and the down lights are left off)?

It trips the mcb, the downlights don't trip the mcb, it is only the under cupboard ones that trip it, it's not every time, but happens a lot

 

[davesparks]

If the only thing that has changed is the installation of the lights then it can only have been caused by you installing the lights.

What steps did you take to establish that the existing circuit is suitable to supply this quantity of LED lights before you fitted them?

 

[Octopus]

Hum......did you supply the parts?

 

[Midwest]

It trips the mcb, the downlights don't trip the mcb, it is only the under cupboard ones that trip it, it's not every time, but happens a lot

What are the make/model numbers of the under cupboard luminaires?

 

[hoppy]

Hum......did you supply the parts?

Yep
I supplied the parts

 

[hoppy]

If the only thing that has changed is the installation of the lights then it can only have been caused by you installing the lights.

What steps did you take to establish that the existing circuit is suitable to supply this quantity of LED lights before you fitted them?

The total load of the new led lights is 200w it is not a load issue, so what else would I need to establish, the ir readings are good, the zs is ok.

 

[Octopus]

^^ so the onus is on you and your pocket to sort it out

 

[davesparks]

The total load of the new led lights is 200w it is not a load issue, so what else would I need to establish, the ir readings are good, the zs is ok.

does that 200W represent the power of the leds theS elves or is it adjusted for the efficiency of the drivers, what is the inrush current for the particular drivers and how long does it last for? What do the manufacturers have to say about the maximum number of fittings per circuit?

 

[Octopus]

The total load of the new led lights is 200w it is not a load issue, so what else would I need to establish, the ir readings are good, the zs is ok.

200 w of led lights sounds very bright. Are you sure that is correct? Is this a house or a commercial premises?

 

[Midwest]

The OP said he installed 17 x 10w down lights = 170w. So I'm guessing the remaining 30w is for the under cabinet lights, the ones causing the issue?

Edit; Be nice if he posted details of the troublesome luminaires.