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

  • State Suggested Helpful Answer
  • Locked Locked
  • Replies 87 replies
  • Answers 2 answers
  • Subscribers 38 subscribers
  • Views 11084 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

Regulation stating a type AC RCD can not be upstream from a type A RCD

Alan B

Hi

I found an EV charger today with built in type A RCD + RDC-DD connected to a type AC RCD in the consumer unit, the AC RCD is also protecting 3 other circuits including sockets. I know this is incorrect because the type AC RCD could be blinded by DC currents, but I am struggling to find a regulation to reference when providing information to the customer?

Thanks

Alan

Parents
  • 0

    I’m struggling to understand the relevance of the regs quoted in NAPIT Codebreakers.

    I agree 411.3.2.1 makes no sense if it's about additional protection, and if they're going to refer to 411.3.3 it probably should include 411.3.4 as well (unless that's done separately with a lower code). C2 seems a bit steep for internal sockets in many cases anyway.

       - Andy.

Reply
  • 0

    I’m struggling to understand the relevance of the regs quoted in NAPIT Codebreakers.

    I agree 411.3.2.1 makes no sense if it's about additional protection, and if they're going to refer to 411.3.3 it probably should include 411.3.4 as well (unless that's done separately with a lower code). C2 seems a bit steep for internal sockets in many cases anyway.

       - Andy.

Children
  • 0 in reply to AJJewsbury

    Just a sight caveat to that AJJ.

    I`ve always taken the view (well for yonks) that an RCD is really a must for all normal duty socket outlets on the basis say you have a few dedicated skts RCD protected for outside use and they often get tied up for something else so one of the handier to use more internally sited sockets get used for that outside work. A practice so common I`d say "all sockets are equal in the eyes of RCD" or some such first approximation.

    One particularly stood out to confirm my opinion some years ago.

    Second floor flat,

    All socket circuits RCD protected.

    Cooker circuit non RCD protected, the cooker switch unit  had a socket on it. Extension lead plugged in and thru the window where lawnmowing and outside drilling was being done. Oh dear!

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