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 15 replies
  • Subscribers 31 subscribers
  • Views 2892 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

Connecting two earthing systems - PME on both - any implications of this?

Former Community Member
Former Community Member
Question out of theorotical interest, can you connect the earthing systems of two PME supplies to achieve equipotential bonding between the two electrical supoplies or devices they power?


What are the pro's and con's of this? I understand the implications of PEN faults which might make the earth have touch voltage but if there is equipotential bonding between two earth systems would the earth fault current (earth which now carries live voltage from neutral) not flow through to the earth of the other PME supply?


Appreciate your thoughts.
Parents
  • 0
    rather depends if they are on the same substation, and if the fact you are adding a parallel link to the street cable neutral matters.

    The correct advice is 'not unless the DNO say it is OK'. They should know the likely diverted current.  Generally they do not like 2 PME supplies in the same buildingg without a lot of deliberation.
Reply
  • 0
    rather depends if they are on the same substation, and if the fact you are adding a parallel link to the street cable neutral matters.

    The correct advice is 'not unless the DNO say it is OK'. They should know the likely diverted current.  Generally they do not like 2 PME supplies in the same buildingg without a lot of deliberation.
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