S
Steve003
Hi, This my first post as I qualified last year and I have been picking up small bits of work, Consumer Unit changes and certs etc. However, recently I came across a situation I have not experienced before and would welcome your views.
The house converted into 4 flats probably in the 70’s-early 80’s. The incoming supply was three phases each with a 100amp BS1361 type fuse. From the supply fuses there appeared to be16mm Flat Twin & Earth running up a cavity through various walls to a consumer unit in each of the floor flats, 2 down stairs and 2 upstairs. Each of the Consumer Units had a 100Amp 30MA RCCB feeding the various circuit MCB’s.
Also, although the Gas pipe was bonded where it entered the building it appeared the Protective Bonding Conductor connected to each of the Consumer Unit MET’s was from a gas pipe which surfaced briefly outside the door of each flat.
I realise the line conductors need to be sized on the prospective short circuit current and the CPC sized to the adiabatic equation, but the sizing of the conductors and the physical protection of the cables appears inadequate at first glance, but as not come across this type of installation before I would welcome your views.
The house converted into 4 flats probably in the 70’s-early 80’s. The incoming supply was three phases each with a 100amp BS1361 type fuse. From the supply fuses there appeared to be16mm Flat Twin & Earth running up a cavity through various walls to a consumer unit in each of the floor flats, 2 down stairs and 2 upstairs. Each of the Consumer Units had a 100Amp 30MA RCCB feeding the various circuit MCB’s.
Also, although the Gas pipe was bonded where it entered the building it appeared the Protective Bonding Conductor connected to each of the Consumer Unit MET’s was from a gas pipe which surfaced briefly outside the door of each flat.
I realise the line conductors need to be sized on the prospective short circuit current and the CPC sized to the adiabatic equation, but the sizing of the conductors and the physical protection of the cables appears inadequate at first glance, but as not come across this type of installation before I would welcome your views.