Earthing of a gear tray in a light fitting

[old_sparky_RE]

Just received in a couple of hundred 240V IP65 light fittings from a well-known manufucture (Clue: What did the lion have pulled from its paw?) and not one of the steel Gear trays are in contact (zero continuity) with the Earthing point of the fitting!

The shell of fittings are non-conductive polycarbonate, but in my mind the 'guts' of the fitting should be in contact with the Earth, be it a fly lead or an Earthing screw.
If on a lamp change the live has come out and is touching the tray, this tray will now be live (insulated from Earth as its mounted in the non-conductive body so the MCB will not trip) if someone touches the tray they will get shocked.

Am I over thinking this, or is this the way 4' lamps are now manufactured, or is this a duff batch I have?


Thanks

 

[Pete999]

Contact Thorn and ask them

 

[topquark]

The tray is normally earthed via the cable connector being in direct contact with the tray at the earth terminal itself. Is there a tab fitted and it's just paint covered on the tray?

 

[old_sparky_RE]

Topquark: There is no bag with 'extra's' in it and no tab, rivet or screw!! So I think Pete's solution will be to email them,
In my mind there should be a bond of some type though.

Thanks to you both.

 

[ian.settle1]

Just received in a couple of hundred 240V IP65 light fittings from a well-known manufucture (Clue: What did the lion have pulled from its paw?) and not one of the steel Gear trays are in contact (zero continuity) with the Earthing point of the fitting!

The shell of fittings are non-conductive polycarbonate, but in my mind the 'guts' of the fitting should be in contact with the Earth, be it a fly lead or an Earthing screw.
If on a lamp change the live has come out and is touching the tray, this tray will now be live (insulated from Earth as its mounted in the non-conductive body so the MCB will not trip) if someone touches the tray they will get shocked.

Am I over thinking this, or is this the way 4' lamps are now manufactured, or is this a duff batch I have?


Thanks

Teach them to isolate it in future before changing the lamps then won't it.

What Top quark is saying that the terminal block where the mains connect to, the earth terminal will be screwed to a tab which is stamped out on the geartray,

 

[snowhead]

Have you tested for continuity between tray and earth?

 

[topquark]

Have you tested for continuity between tray and earth?

He has, that's how he's identified the problem

 

[Robotstar5]

As above, most of the fittings I've put up have the centre terminal on the connector block fitted to a pressed out tab, one make (can't remember name) of emergency lighting had a separate earth flylead with a lucar connector that went onto the tab.

 

[snowhead]

He has, that's how he's identified the problem

Missed that bit,, was trying to work out what Lion he was on about.

 

[snowhead]

Teach them to isolate it in future before changing the lamps then won't it.

,

And to use fibreglass step ladders.