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 3 replies
  • Subscribers 32 subscribers
  • Views 864 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

5 core - shared CPC

vantech

Hi, 

Any issues with a 5 core 2.5mm with a shared CPC between 2 separate final circuits. 

The 5 core ands into a junction box feeding 2 separate radial circuits for sockets. 

Core 1 = Live c1

Core 2 = Neutral c1

Core 3 = Live c2 

Core 4 = Neutral c2 

Core 5 = CPC for both C1 and C2 

Thanks. 

  • 0

    In principle there's no problem - it's the same situation as where steel conduit is used as the c.p.c.. In practice, a bit of extra care is needed - e.g. so that the c.p.c. of a live circuit isn't disconnected when working on the other one, so a label or two might be useful (if not a direct regs requirement).

        - Andy.

  • 0 in reply to AJJewsbury

    As I thought, thanks. 

  • 0

    All sounds OK to me (AJJ makes some sensible recommendations). 

    Think of it this way - if you took your 5 core (flex/solid/SWA etc) to a housing - example a "Gewis Box" with connectors inside then took your circuit 1 and circuit 2 connections plus earth connections from the 5 terminals then that would be the same as done in a dist board etc. 

    So, no , no issues, but clear marking to help avoid future disconnections etc would be a good thing to do

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