tt system

[9regnac]

Customer has a tt system with a 30ma rcd as main switch on cu. would you upgrade this board and put type s in or..??

 

[Knobhead]

Hi-Tony

he said it was a wylex, however no mention how old or what type, maybe wrongly I think he means the old type, maybe even wooden backed, however thats a complete guess of course, it may be more modern, we will have to wait for another reply first.

I was wondering if it was a metal or plastic encloseure. As you know makes quite a difference.

 

[ackbarthestar]

300mA is the recognised value of RCD for fire protection. But using a 100mA, it'll be that much of a closer fire protection!! lol!!

Not to be too pedantic 532.1 (i) suggests that 300mA is the maximum value

 

[Engineer54]

300mA is the value that just about every manufacturer states as the value required for fire protection. Sure anything lower is going to be better, and have a far closer protection level.