0.4 seconds or 5 seconds

[Dartlec]

No it isn't, RCD protection is not 'almost across the board' in new installs.
RCD protection is only required for the situations specified in BS7671.

It is only in domestic installations that RCD protection for every circuit has become the norm.

Yep, should have clarified I was talking about domestic as I did in my later post.

 

[ForkEnigma]

You can hav

Just a quick question. This might sound like a stupid question so apologises. I'm slightly confused with the regs 18th edition when it comes to disconnection times. So I was taught in college that in the 17th edition that when a circuit is less than 32A then the maximum permitted time is 0.4 seconds and anything over 32A then its 5 seconds. Now in the 18th edition has it has been changed? So that anything under 63A supplying socket outlets its 0.4 seconds and anything over 63A its 5 Seconds. And also why would you have socket outlets on a 63A breaker when it should be on a 32A ring or 20A radial. Sorry if those questions sound stupid, it's just I can't get my head around it for some reason. Thanks.

You can have 40A electrack feeding sockets