cpc csa

[regsmyth]

I started to use the earth from red/black 2.5 te to earth all the backboxes, but it seems thinner than the earth in the new blue/brown 2.5 te.
When did the cpc csa change? What size should it be for backbox earthing? Does it really matter?

 

[ricicle]

Some old 2.5 t+e used to have 1.0mm² earth in it s opposed to 1.5mm² but that was in the early days of red and black. It does not really matter as there is no requirement to earth the back boxes anyway as long as the box has at least one fixed lug.