3Ph sub-mains supplied via 5-core NYY, not SWA. OK or not?

[The Ghost]

511.1 Every item of equipment shall comply with the relevant requirements of the applicable British or Harmonized Standard, appropriate to the intended use of the equipment. The edition of the standard shall be the current edition, with those amendments pertaining at a date to be agreed by the parties to the contract concerned (see Appendix 1).
Alternatively, if equipment complying with a foreign national standard based on an IEC Standard is to be used, the designer or other person responsible for specifying the installation shall verify that any differences between that
standard and the corresponding British or Harmonized Standard will not result in a lesser degree of safety than that afforded by compliance with the British or Harmonized Standard. Such use shall be recorded on the appropriate
electrical certification specified in Part 6.

511.2 Where equipment to be used is not covered by a British or Harmonized Standard or is to be used outside the scope of its standard, the designer or other person responsible for specifying the installation shall confirm that the equipment provides at least the same degree of safety as that afforded by compliance with the Regulations. Such use shall be noted and appended to the appropriate documentation specified in Part 6.


You know what I think I'll just use SWA fk it.

 

[The Ghost]

The Approved Cables Initiative (ACI) :: ACI issues warning to installers over cable claims

CY Cable, NYY cable , Wiring Regulations, ACI, third party approval, HAR, BASEC, British standards, cable compliance

www.aci.org.uk

from the page;
Recent examples include so-called NYY cables claiming, via external marking, to meet IEC 60502-1, and a so-called CY cable claiming, via its external marking, to comply with BS EN 50525-2-11. When independently tested, the former showed that the thickness of the outer sheath was significantly below that required by the standard, and with the latter the construction and marking did not conform to the requirements of the standard.

 

[marconi]

I think Vortigen makes a very good case for sticking with SWA. Doing so avoids the risk, cost, hassle and time required to justify something else instead before installation or later on - even though NYY may intrinsically be as good and safe as SWA. Let someone else pioneer its use, especially in the home environment.

Plucked from a cable distributors website it says - NYY is used as a power cable for energy supply in static installations, indoors, outdoors, underground, in concrete and in water where mechanical damages are not to be expected.

The thing is, one has to be especially careful with cables which if damaged have high short circuit and fault currents. For me the earthed steel wire armouring is a superb form of protection electrically and mechanically.