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BS 7671 interpretation of clause 560.7.7

MS01
Within BS7671 there is the following clause:-

560.7.7 Safety circuit cables, other than metallic screened, fire-resistant cables, shall be adequately and reliably separated by distance or by barriers from other circuit cables, including other safety circuit cables.

Now I read this in two ways, the first is this is specifically talking about fire rated cables only… or

This is insinuating that unless I use a metallic screened fire-resistant cable I must provide separation by distance or by barriers including from other safety circuit cables. Does this mean a common dedicated medical IT final circuit trunking is not acceptable as each IT circuit in its own right is a safety circuit, therefore if I was to move away from fire rated cable I would need to ensure each IT circuit is installed in its own individual piece of containment (conduit) to give the correct level of separation or would a common galvanised trunking dedicated to the IT cabling be sufficient.

I appreciate no one will give me an answer to the question above, but can people let me know how they interpret this clause to see if I’m on the right lines.  

Can I ask how do you interpret this clause?

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    That might be evidence of the fact that the particular requirements of 560.7 weren't written for Medical IT systems.


    And they wouldn't necessarily be, as:


    (a) It's not part of Section 710; and

    (b) BS 7671 doesn't specifically require any part of Medical IT systems to be classified as safety circuits - but see 710.560.6.1.1(iii) and 710.560.7 for equipment that could be designed to use or be part of a Medical IT system, if the design assessments determine.



    Perhaps this is an item for future clarification through HTM 06-01 which actually contains the requirements for Medical IT Systems final circuits to be classified as safety circuits as a general carte-blanche statement?
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  • 0
    That might be evidence of the fact that the particular requirements of 560.7 weren't written for Medical IT systems.


    And they wouldn't necessarily be, as:


    (a) It's not part of Section 710; and

    (b) BS 7671 doesn't specifically require any part of Medical IT systems to be classified as safety circuits - but see 710.560.6.1.1(iii) and 710.560.7 for equipment that could be designed to use or be part of a Medical IT system, if the design assessments determine.



    Perhaps this is an item for future clarification through HTM 06-01 which actually contains the requirements for Medical IT Systems final circuits to be classified as safety circuits as a general carte-blanche statement?
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