Lighting wired in singles

[wallyanker]

Hello, can anyone explain the reason for this.

Went to a friends the other day as the RCD was tripping regularly, pinpointed it to a faulty dishwasher, anyway........

Whilst I was there in the loft doing another job, I noticed the lighting was wired in singles, the live and earth loop in&out was at the switch, neutral loop in&out at the light fitting. Why would it have been wired this way and not looped at the same place?

Thanks
Pete

 

[GaryM]

Remember, run a CPC to every accessory, there is reg number somewhere!

411.3.1.1
A circuit protective conductor shall be run to and terminated at each point in wiring and at each accessory except a lampholder having no exposed-conductive-parts and suspended from such a point.