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*SOLVED* Potential (typo) error in 709.521.1.4 Wiring systems of marinas

-2400-
*Note, my mistake, corrected by Chris P. in 1st reply. Question left in case it is of interest to anyone else*


I have just noticed what looks like a possible error in my early 18th Edition, and it isn't addressed in the December 2018 Corrigendum. It might have been mentioned already on the forum, but if so I missed it.


709.521.1.4 The following wiring systems are suitable for distribution circuits of marinas:

(i) Underground cables

(ii) Overhead cables or overhead insulated conductors

(iii) Cables with copper conductors and thermoplastic or elastomeric insulation and sheath installed within an

appropriate cable management system taking into account external influences such as movement, impact,

corrosion and ambient temperature

(iv) Mineral-insulated cables with a PVC protective covering

(v) Cables with armouring and serving of thermoplastic or elastomeric material

(vi) Other cables and materials that are no less suitable than those listed above


I assume "serving" in (v) should either be "sheath" / "sheathing" similar to the wording in (iii); or possibly "covering" as in (iv).


Does anyone know if this has been acknowledged and what the official correct wording (if different) should be?


  • 0
    It is unchanged since 17th+3.


    OED tells me that the term "serving" was originally a form of protective covering for a rope, but may also be applied to a cable.


    Every day's a school day. ?
  • 0
    Thanks Chris.

    Back to school for me then ?‍?


    (Although a bit of consistency between the sub-clauses would have helped).

    Interestingly, this is the only use of that term in the standard (at least in a pdf copy of the draft version).
  • 0
    Paper-insulated lead covered cables are usually protected by steel tape or steel wire armouring and served overall with hemp or pvc. The serving protects the steel armouring against oxidation and corrosion.

    This type of cable was (and still in service) mainly used by Electricity boards/ DNOs for the distribution systems in which case they are out of scope of IET regulations. But I think we are splitting hairs, I think we can let the regs off on this one, we know what they mean!


    Regards, UKPN
  • Former Community Member
    0 Former Community Member
    one of the older members of the "wiring regulations committee". 


    UKPN's reply appears to have been deleted in the time between my copy and paste extract above and my reply here..........


    Anyone who has read B.31 in the last amendment in 1976 of the 14th will be familiar with "serving"?


    This Reg starts of with:

    Where cables insulated and/or sheathed with general-purpose p.v.c., or  paper-insulated cables or cables having bituminous-compounded beddings and/or servings etc..................


    Regards


    BOD




  • 0
    Yes, sorry about my deletion Perspicacious, on reflection I looked at my post and felt I could write a more accurate description. regarding the old Electricity boards systems. I will try and get a pic for members when I am around tomorrow, there are many in service still. By the way, when I mentioned "older members" I meant the wiring committee, not this forum.


    Regards, UKPN
  • 0
    UKPN:

    By the way, when I mentioned "older members" I meant the wiring committee, not this forum.


    Ah yes, but we younger members welcome the contributions of older members, who remember former versions of BS 7671. ?


    Incidentally, in my time in RN, the only interpretation that I knew of "serving" was a plate of food. Tar was long gone, but perhaps Ancient Mariner has a longer memory? ?


  • Former Community Member
    0 Former Community Member
    but we younger members welcome the contributions of older members, who remember former versions of BS 7671. ?


    Good job I didn't mention 229 (B) (i) in the 12th Edition of September 1955 mentioning served cable then Chris, when I was, contrary to popular rumour, actually minus 6 months!


    Regards


    BOD
  • 0
    Chris Pearson


    Incidentally, in my time in RN, the only interpretation that I knew of "serving" was a plate of food. Tar was long gone, but perhaps Ancient Mariner has a longer memory? ?


    I cannot help with cable or rope serving, but as regards a plate of food, you may wish to compare your RN plate of food with the larder of the MN  http://ancient-mariner.co.uk/public/Scale%20of%20Provisions.pdf and then compare with what the US Navy were serving. Note page 105  it must have been tough in the USN!
    https://maritime.org/doc/cookbook1945/index.htm#:~:text=Navy%20Department%2C,the%20newer%20knowledge%20of%20nutrition.

    Clive


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