Replacing some 6' fluorescents with LED panels in newly installed suspended ceiling.
Expecting to find most of the fittings wired loop in - loop out and one fitting with switched live.
However to my surprise I found the wiring as above but there was also two double sheathed single lives terminating at the fitting with the lives in the T&E linked.
The initial install was 1974, before my time, so if any of the dinosaurs can give me a few pointers as to whats going on would be appreciated.
Expecting to find most of the fittings wired loop in - loop out and one fitting with switched live.
However to my surprise I found the wiring as above but there was also two double sheathed single lives terminating at the fitting with the lives in the T&E linked.
The initial install was 1974, before my time, so if any of the dinosaurs can give me a few pointers as to whats going on would be appreciated.