A
AdamKerr88
Today i have been asked to give an independant opionion on electrical work undertaken by another electrician on a commercial property.
There has been work done to "improve the mains bonding arrangments".
The buildings supply is a 100a 3 Phase TN-C-S. Connection to this is by a 50mm2 single, crimped and bolted to the side of the cut-out connecting to a small domestic 8 way MET. There is then a 16mm2 cpc supplying the D.B which is fed from a 100x100 trunking between the supply and the D.B.
Before the work was carried out there was 2 x 10mm2 singles connecting the MET to the incomming gas service. He has now cut these back, crimped and screwed them to the side of the 100 x 100 trunking. Surely this has only made the situation worse ??
543.2.2 does say that a metalic cable management system can be used as a protective conductor but surely not for mains bonding as this must be connected directly to the MET?
This is by no means the only issue here, however i dont want to list "Protective bonding conductors not connected directly to the MET" if this is not actually incorrect.
Thanks
There has been work done to "improve the mains bonding arrangments".
The buildings supply is a 100a 3 Phase TN-C-S. Connection to this is by a 50mm2 single, crimped and bolted to the side of the cut-out connecting to a small domestic 8 way MET. There is then a 16mm2 cpc supplying the D.B which is fed from a 100x100 trunking between the supply and the D.B.
Before the work was carried out there was 2 x 10mm2 singles connecting the MET to the incomming gas service. He has now cut these back, crimped and screwed them to the side of the 100 x 100 trunking. Surely this has only made the situation worse ??
543.2.2 does say that a metalic cable management system can be used as a protective conductor but surely not for mains bonding as this must be connected directly to the MET?
This is by no means the only issue here, however i dont want to list "Protective bonding conductors not connected directly to the MET" if this is not actually incorrect.
Thanks