P
PhilB
I was called to a farm today as the RCBO protecting several 13amp sockets on a work bench kept tripping intermittantly.
Upon removing the first socket (all metal clad twins fed in PVC conduit/egatube) I found that the 1.5mm CPC insulation had melted and welded itself to the neutral & live conductors along most of its length which is about a 15/20mtrs run from the consumer unit. The cabling is all in singles on a radial circuit with not a lot of load, a pillar drill, small grinder and a car battery charger.
I didn't find or notice any over heating coming from the L-N conductors. The incoming supply is a TT system and the Zs/Ze readings are perfectly fine. Running in with this radial circuit are two red 1.5mm singles (feed & switch wire) supplying two fluorescent fittings but other than that the conduit isn't jam packed. The lighting is fed from a different breaker but on the same phase as the sockets. Any ideas why?
Upon removing the first socket (all metal clad twins fed in PVC conduit/egatube) I found that the 1.5mm CPC insulation had melted and welded itself to the neutral & live conductors along most of its length which is about a 15/20mtrs run from the consumer unit. The cabling is all in singles on a radial circuit with not a lot of load, a pillar drill, small grinder and a car battery charger.
I didn't find or notice any over heating coming from the L-N conductors. The incoming supply is a TT system and the Zs/Ze readings are perfectly fine. Running in with this radial circuit are two red 1.5mm singles (feed & switch wire) supplying two fluorescent fittings but other than that the conduit isn't jam packed. The lighting is fed from a different breaker but on the same phase as the sockets. Any ideas why?