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Supplementary equipotential bonding of socket outlets in group 1 medical locations

Julien Leblanc
Hello,


It is my first contact with medical locations and I'm not sure about some stuff .


In the case of a medical facility which has only group 1 medical locations, such as different types of examination rooms, massage rooms, hydrotherapy rooms, physiotherapy rooms, etc.

Art. 710.415.2.1 of BS 7671 says that supplementary equipotential bonding shall be installed and supplementary bonding conductors should be connected to (i) Protective conductors.

I also read MEIGaN and Annex 1...


In these locations of the medical facility, we only have sockets feeded by TN-S circuits (there are no IPS sockets).

I would like to be sure that i didn't misunderstood: the above cited article implies that every socket outlet should be connected with the EBB by means of supplementary bonding conductors, I mean it refers not only to IPS sockets, but also to TN-S sockets, am I correct?


Thank you.
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    Andy is correct, see Regulation 710.411.3.2.5 and 710.415.2.1. The socket-outlets on TN-S also require additional protection by RCD, see 710.411.4.


    MEIGaN does not apply any more - the current NHS guidance in England is the latest version of HTM 06-01. Wales and Scotland each have a different electrical services guidance document.
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    Andy is correct, see Regulation 710.411.3.2.5 and 710.415.2.1. The socket-outlets on TN-S also require additional protection by RCD, see 710.411.4.


    MEIGaN does not apply any more - the current NHS guidance in England is the latest version of HTM 06-01. Wales and Scotland each have a different electrical services guidance document.
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