Voltage reading puzzle

[ste77]

is it loop in?

 

[toast]

is it loop in?

It's mixed bag some fittings are looped-in at ceiling and others are junction/jointed in void.

 

[ste77]

It's mixed bag some fittings are looped-in at ceiling and others are junction/jointed in void.

id be trying to break the circuit down and find what leg your fault is on.

 

[Octopus]

id be trying to break the circuit down and find what leg your fault is on.

I'd be doing dead tests at different fittings!

 

[toast]

id be trying to break the circuit down and find what leg your fault is on.

That is my next move, just a little puzzled why this fault could occur. Never come across it before.

 

[ste77]

That is my next move, just a little puzzled why this fault could occur. Never come across it before.

i always enjoy stuff like this, gives you a greater sense of satisfaction when i find the fault, unfortunately with our line of work these things occasionally crop up.

 

[toast]

I'd be doing dead tests at different fittings!

The circuit is on two levels, my thought were to disconnect the supply that enters the loft. Then test the level below, hopefully eliminating one floor.
Hoping that the fault lies within the loft as access is easier.

 

[ste77]

I'd be doing dead tests at different fittings!

Hes said hes already IR tested and its clear, but im inclined to think id be doing them again!

 

[toast]

i always enjoy stuff like this, gives you a greater sense of satisfaction when i find the fault, unfortunately with our line of work these things occasionally crop up.

Indeed, and once you have diagnosed the fault, it's in your armour.

 

[ste77]

The circuit is on two levels, my thought were to disconnect the supply that enters the loft. Then test the level below, hopefully eliminating one floor.
Hoping that the fault lies within the loft as access is easier.

Only you'll know whats easiest, did the guy only change the CU? wasnt poking around in anything else?

 

[Octopus]

Hes said hes already IR tested and its clear, but im inclined to think id be doing them again!

An IR test on a circuit with a "break" on it or loose connection isn't going to tell you anything, whereas a R1 + R2, R1 + RN, R2 + RN to confirm the continuity of all conductors followed by IR would be of more use.

 

[toast]

Hes said hes already IR tested and its clear, but im inclined to think id be doing them again!

Yes the IRs came up brand new, I did test twice but there were people in the house, may be that a switch could have been opened then closed without my knowledge.

 

[ste77]

An IR test on a circuit with a "break" on it or loose connection isn't going to tell you anything, whereas a R1 + R2, R1 + RN, R2 + RN to confirm the continuity of all conductors followed by IR would be of more use.

.
Yes agreed.

 

[Octopus]

.
Yes agreed.

But I don't think the OP does though. lol

 

[toast]

Only you'll know whats easiest, did the guy only change the CU? wasnt poking around in anything else?

I did ask the question and claims not to have touched anything else, other than the CU. Which also seems to be confirmed by what the occupants are telling me.