UK 2022 based regs question.
Hello, I have a new extension and the builders electrician has required much of the house ( not asked for ) and replaced previously working wiring ( installed 2018) with new.
As a lot of the switches are hanging off the walls and nothing much is working yet I thought I would have a closer look. generally very tidy job but I am surprised to find no brown or blue L/N wiring. For example room 1: with 4 LED down lights switched live single pole switch has grey,black and brown + earth. My probe tells me that the brown is L the black is N and the grey is what? The wiring is b to switch, grey and black both in double terminal blocks so doing nothing at the switch. There seem to be multiple accessions where grey black brown have been used and other where conventional blue brown are in use. Some of the work in progress can be seen in the pics.( no they can’t the forum gives a security error when I try to attach them)
Is this normal and good practice and if so when did blue neutral disappear from domestic wiring codes ? And when do you get to choose which kind of cable to run, plus isn’t a three core and earth a bit of a waste of copper and cost in a lighting circuit anyway?
I would be very interested to read up on current regulations if there is a link,
Many thanks for any responses
Hello, I have a new extension and the builders electrician has required much of the house ( not asked for ) and replaced previously working wiring ( installed 2018) with new.
As a lot of the switches are hanging off the walls and nothing much is working yet I thought I would have a closer look. generally very tidy job but I am surprised to find no brown or blue L/N wiring. For example room 1: with 4 LED down lights switched live single pole switch has grey,black and brown + earth. My probe tells me that the brown is L the black is N and the grey is what? The wiring is b to switch, grey and black both in double terminal blocks so doing nothing at the switch. There seem to be multiple accessions where grey black brown have been used and other where conventional blue brown are in use. Some of the work in progress can be seen in the pics.( no they can’t the forum gives a security error when I try to attach them)
Is this normal and good practice and if so when did blue neutral disappear from domestic wiring codes ? And when do you get to choose which kind of cable to run, plus isn’t a three core and earth a bit of a waste of copper and cost in a lighting circuit anyway?
I would be very interested to read up on current regulations if there is a link,
Many thanks for any responses