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 8 replies
  • Subscribers 32 subscribers
  • Views 1032 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Supplementary bonding conductor in a medical location

Julien Leblanc
Hello,


After reading from many sources about the medical locations' supplementary equipotential bonding, everything is mixed in my head...


Suppose we have a current using device inside a group 1 medical location (TN-S supplied).

Then the protective conductor of that device must be connected to the EBB installed in this location by means of a supplementary equipotential bonding conductor.

Could someone clarify this:  that bonding conductor, should it comply with art. 544.2.1 or with art. 544.2.2 from BS7671, that is, the EBB should be considered an extraneous-conductive-part or an exposed-conductive-part ?


Thank you.
Parents
  • 0
    The equipotential bonding busbar shall be connected to the system earthing using a protective conductor having a cross-sectional area greater than or equal to the largest cross-sectional area of any conductor connected to the equipotential bonding busbar.


    I suppose it will be a separate conductor, or it can be via the largest cpc of all circuits in that location?

    Figures 710.2 from BS7671 and figs 14.4 and 14.7 from https://shop.theiet.org/guide-to-electrical-installations-in-medical-locations seem to indicate a separate conductor.


Reply
  • 0
    The equipotential bonding busbar shall be connected to the system earthing using a protective conductor having a cross-sectional area greater than or equal to the largest cross-sectional area of any conductor connected to the equipotential bonding busbar.


    I suppose it will be a separate conductor, or it can be via the largest cpc of all circuits in that location?

    Figures 710.2 from BS7671 and figs 14.4 and 14.7 from https://shop.theiet.org/guide-to-electrical-installations-in-medical-locations seem to indicate a separate conductor.


Children
No Data

Community Rules & Guidelines