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Wierd one....

Hi everyone. 


So,  today we installed 6 new led panels in a new ceiling grid

The panels ar Ansell panels.  They are class 2. Low volt.


Then , our plumber says he has had a shock when touching the ceiling grid and a boiler at the same time.


So, we tested the ceiling grid to a local earth.   120V AC  or   -2.9V DC......   The grid  even lights a volt stick....


After trying several ideas I eventually swapped the live and neutral connections on the primary of the led drivers.......


The result..... no measurable voltage  between the grid and earth.......


The driver and the led panel are both marked class 2 ......


How is this possible??


Is it safe?


Do I need to bond the ceiling grid?
Parents
  • I've seen this also with SELV drivers for 12v undercabinet lighting, where the customer (or in one case myself) has received a painful 'nip' from the supposed isolated DC side wiring. Makes me wonder if it wouldn't be better to earth the secondary and effectively make it FELV?
Reply
  • I've seen this also with SELV drivers for 12v undercabinet lighting, where the customer (or in one case myself) has received a painful 'nip' from the supposed isolated DC side wiring. Makes me wonder if it wouldn't be better to earth the secondary and effectively make it FELV?
Children
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