Lighting circuit advice please!!!

[2nd Life]

Main concern about this is that it's clearly a class 1 fitting, having a flylead from bracket to the fitting, but there's no sign of cpcs anywhere else.

That's 100% accurate. Metal exposed parts fed by a 2 core cable with no CPC. It's getting ripped out shortly!!

 

[Dave5678]

Would you mind expanding on the 42ohms

Well you see how you’ve got a brown conductor connected to one choc block and a blue conductor connected to the other? They both go down through the same black sheath into the light fitting where they are connected together by a lamp and, judging by the shadow, maybe a fan motor too, so you’ll be measuring the resistance of whatever is connected to those two conductors.

If you measured between the permanent line (red conductors) and neutral then you will be measuring the loads in all the rooms on the circuit where you’ve left light switches on.

You also know that V = I R so when switched on whatever is connected will be pulling approximately 230/42 = 5.5A if that measurement is correct.

 

[2nd Life]

Well you see how you’ve got a brown conductor connected to one choc block and a blue conductor connected to the other? They both go down through the same black sheath into the light fitting where they are connected together by a lamp and, judging by the shadow, maybe a fan motor too, so you’ll be measuring the resistance of whatever is connected to those two conductors.

If you measured between the permanent line (red conductors) and neutral then you will be measuring the loads in all the rooms on the circuit where you’ve left light switches on.

You also know that V = I R so when switched on whatever is connected will be pulling approximately 230/42 = 5.5A if that measurement is correct.

Thanks Dave. The 42 ohms measurement was actually taken at a different light fitting in another room at the switch live and neutral of a wall light. But all the same applies there were still loads in circuit clearly.

What I wasn't expecting was any continuity between the two at all. The conductors were disconnected at the board. But, If it's passing down one through a lamp etc and back up that makes sense.

Sorry for the silly questions! . Cheers mate

 

[littlespark]

Thanks Dave. The 42 ohms measurement was actually taken at a different light fitting in another room at the switch live and neutral of a wall light. But all the same applies there were still loads in circuit clearly.

What I wasn't expecting was any continuity between the two at all. The conductors were disconnected at the board. But, If it's passing down one through a lamp etc and back up that makes sense.

Sorry for the silly questions! . Cheers mate

Live and neutral at the switch?

Was it live and switchwire?

 

[2nd Life]

Live and neutral at the switch?

Was it live and switchwire?

No live and neutral at the wall. But that would be the switch live right?