LED ceiling tiles startup current

joelypops · Nov 10, 2014

I have been asked to quote a shop fit out that will have 52x 45w LED ceiling tiles overall. they would like 12 switched at a time if possible, but on a previous job I only had 6 on one switch and had to use a 10A C-type MCB just to sto pthem tripping out on startup. I was thinking of wiring them in 2.5 and using a 20A C-type for each bank of 12 unless anyone else has any other clever ideas?

Cheers,
Joel.

VoltzElectrical · Nov 10, 2014

Try contacting the manufacturer to see what they recommend?

Andy78 · Nov 10, 2014

As above, the manufacturer should be able to supply inrush current data to help with your calcs.

Switching via contactors would be the obvious solution to large switchways.

Guest77 · Nov 10, 2014

joelypops said:
I have been asked to quote a shop fit out that will have 52x 45w LED ceiling tiles overall. they would like 12 switched at a time if possible, but on a previous job I only had 6 on one switch and had to use a 10A C-type MCB just to sto pthem tripping out on startup. I was thinking of wiring them in 2.5 and using a 20A C-type for each bank of 12 unless anyone else has any other clever ideas?

Cheers,
Joel.

We did an office block with hundreds of those exact lights a few months back and had around 10 on each PIR, they were on c rated MCBs and we never had any issues.

Farmelectrics · Nov 10, 2014

Why 2.5 and why 20a

SPARTYKUS · Nov 10, 2014

I LOVE contactors.

soulman · Nov 10, 2014

Hi, i contacted the manufacturer for the jcc sky tile 34w, the inrush current was 1.5A per unit.

joelypops · Nov 11, 2014

I need to get a definate answer on which tile they want. Going on 1.5A inrush though to switch 12 at a time I'm going to need a 16A ish.. possibly going to go the contactor route.. typically they are happy to spend over £5000 on ceiling tiles but want to question every other minor point on my pricing...