TT CU with One 30mA RCD as a main switch.

[Megaohm7]

I've just read p.g 234 BRB and BSEN 60439-3:1991 states particular requirements for low voltage switchgear and control gear asemblies intended to being installed in places where unskilled persons have access to their use. Distribution boards. Have I understood this to using the appropriate switchgear for the situation?

 

[NozSpark]

It's basically just an overall British standard for distribution boards,,, it covers the enclosure, types of switch gear and the types of protective devices that can be installed.. The components have their own British standard

 

[steptoe]

yep, 230v is classed as LV.

a few common numbers for you

60439 cu

60947-3 main sw

5419 - main sw (usually older type)

60898 - mcb

3871 - mcb

61008 - rcd

61009 - rcbo

there are of course loads more, those are the common ones I have on the end of my tongue just now.

 

[batty]

Older RCD's may be BS4293 which have different tripping times.

 

[Megaohm7]

In the case of BS4293 200mS while the newer type BSEN 61008 300mS