Can I ask your opinion in relation to neutral /earth on this rather untidy changeover arrangement located just downstream of the main isolator? There are 2no 3-pole contractors with mains in bottom left and generator in bottom right. On the stud adjacent they have connected gen neutral, DNO neutral and installation earth. The arrangement means a self-imposed conversion to an unauthorised TNCS. I can’t be sure if the existing supply is already TNCS.
David, WB, I cannot give a C2 or FI as the report must have a satisfactory designation so such things must be rectified before the issue of the report.
I think it needs to be rectified - it's especially important if there's no earth electrode on the consumer side, but diverted neutral currents is a distinct possibility unless the premises is some distance from other installations and there are no shared extraneous-conductive-parts.
David, WB, I cannot give a C2 or FI as the report must have a satisfactory designation so such things must be rectified before the issue of the report.
I think it needs to be rectified - it's especially important if there's no earth electrode on the consumer side, but diverted neutral currents is a distinct possibility unless the premises is some distance from other installations and there are no shared extraneous-conductive-parts.
