double insulated metal case 240v downlights in bathroom... earth or not?

Feb 17, 2015 7 Replies
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First reply

Tim Watts

If the product is actually marked as Class II (box in box symbol) I wouldn't. Though arguably it won't do much harm in this case to make it a Class I - just a bit unnecessary. Does it have a parking terminal for the CPC?

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double insulated metal case 240v downlights in bathroom... earth or not?



Old identical (lamp thread knacked) downlight had an earth lead cable-tied to the (genuine looking) 2 core flex from jctn box earth to downlight, screwed to metal down light case, looks like this 'flying earth' was added on installation....



So do I replicate this arrangement with the replacement?



TIA



Jim K


If the product is actually marked as Class II (box in box symbol) I wouldn't. Though arguably it won't do much harm in this case to make it a Class I - just a bit unnecessary. Does it have a parking terminal for the CPC?

I would add earthing. Heavy condensation is normal in bathrooms, I'd hate to rely on something being class 2 there.

NT

/Does it have a parking terminal for the CPC?/q

Square in square mark is there. Fitting is from toolsatan 37092 by CED.

Theres a fitted 2 core (L & N) fly lead already wired to the lampholder, no other specific earthing point I can see.

On the visually very similar old one, the added earth was attached with a self tapper to a hole in the steel body. On the new one that hole is present, tho untapped & unmarked....

Jim K

You dont mention whether it meets class 2 requirements, chinese mfrs too often cut corners after the product has achieved buyer approval. A sticker has limited value these days.

NT

/You dont mention whether it meets class 2 requirements, /q

Why should it meet Class 2 ?

Jim K

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