The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 11 replies
  • Subscribers 31 subscribers
  • Views 2634 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Rcd discrimination

NGUACE
Any Information greatly appreciated.


Each outdoor socket has to be RCD protected, so if you have a junction box supplying more than one outdoor 30ma socket, how do you achieve RCD discrimination all the way back. I have an older C/U and the rcd on it is also 30ma?


A spur from internal plug to fused switch outside, which then feeds multiple outdoor sockets?


this is just a scenario I am trying to figure out.


thanks for anyone’s time.


Andy
Parents
  • 0
    mapj1:

    If you have an RCD in the supply to the socket, either at the socket or back at the dis board, then the socket meets the regs, as it has RCD protection. The regs do not care about where.


    They do, however, care about the standard that the RCD is manufactured to. The RCDs in the socket-outlets, if none are provided upstream, should comply with the standards stated in either Regulations 531.3.4.1 or 531.3.4.2 for fault protection, or Regulation 531.3.6 for additional protection.


    BS 7288 is currently not accepted in BS 7671 for RCDs - but if the installation design was conducted, and any additional sock-outlets installed, under BS 7671:2008+A3:2015 there is no such constraint.


Reply
  • 0
    mapj1:

    If you have an RCD in the supply to the socket, either at the socket or back at the dis board, then the socket meets the regs, as it has RCD protection. The regs do not care about where.


    They do, however, care about the standard that the RCD is manufactured to. The RCDs in the socket-outlets, if none are provided upstream, should comply with the standards stated in either Regulations 531.3.4.1 or 531.3.4.2 for fault protection, or Regulation 531.3.6 for additional protection.


    BS 7288 is currently not accepted in BS 7671 for RCDs - but if the installation design was conducted, and any additional sock-outlets installed, under BS 7671:2008+A3:2015 there is no such constraint.


Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines