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 30 replies
  • Subscribers 30 subscribers
  • Views 7115 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

Three Phase RCD & MCB Wiring?

Nano Brewery
Please could somebody advise on the most cost effective procedure of wiring up RCDs & MCBs on a DIN Rail for independent circuit protection.  Tried Googling to no joy.  Plenty of Single Phase advice, images, videos.  If using 4 Pole MCBs & RCDs, would I be correct in assuming that similar to single phase, it's just a case of Busbar-ing the MCB Lives to the RCD Lives and taking the RCD to Neutral Bar?


Have seen diagrams (like below) where the Incoming L1, L2, L3 get split to separate DP MCBs, RCDs and SP MCBs for each phase.  Seems like a bit of a faff and a pricey option (3x DP MCBs + 3x RCDs + 3x SP MCBs) per circuit.


I have 3x Three Phase Circuits (13A, 40A, 48A) that I wish to protect independently with RCDs.


Thanks in advance!  Dan.

ddbd56232f43509726e961c7a00902b6-huge-image-20210208123140-1.png
Parents
  • 0
    Dan if the equipment you are using is 3 phase then you need a 3 phase distribution board not 3 seperate boards as in the picture of your original post. If you cant aford the price quoted why not find an electrician that will advise you as to what is needed and you fit that and the electrician can connect it.

Reply
  • 0
    Dan if the equipment you are using is 3 phase then you need a 3 phase distribution board not 3 seperate boards as in the picture of your original post. If you cant aford the price quoted why not find an electrician that will advise you as to what is needed and you fit that and the electrician can connect it.

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