Advice needed on neutral issue

[Thebeast27]

Came accross a remedial whilst at work where a previous engineer had raised a job to investigate poss borrowed neutrals on a lighting db which sits next to a general power db both fed from same rising busbar with same tap off supply characteristics i decided to isolate each individual circuit whilst clamped on the neutrals and check for any current to prove correct for corresponding curcuit however i came accross a situation where ever circuit was dead however one neutral was displaying around an amp on it but one disconnected from neutral bar to check any stray voltage cable was dead would i be correct in persuming poss phantom current due to over circuits and routing of singles fed from other db causing the clamp meter to pick this up ?

 

[IAmSparkytus!]

That's one long sentence! ?

 

[Lucien Nunes]

Is the circuit to which that neutral belongs RCD protected? If not, I suspect a neutral-earth fault. This can cause currents to circulate through neutrals with very little voltage driving them, hence the lack of significant reading when you disconnected it from the bar. Had it been borrowed by a circuit from a different DB that was still live, it would have floated up to line voltage (unless the load was switched off part-way through your test).

IR test to earth would be my next move.