After reading the article to clarify in “Wiring Matters” I am confused.
BS 7919, BS 6500, HO7RN-F, CENELEC HD22.4 S4, and 3183YAG all refer to flex often referred to as Arctic cable.
The voltage rating is either 300/500 volt or 450/750 volt and the article rightly pointed out that the peak voltage of a 230/400 volt RMS supply is 325/565 peak so the 300/500 volt rated cable should only be used on reduced low voltage supplies. And also the temperature varies with some cable only rated at 5 deg C where some manufactures state -20 to -30 degrees C.
However when one tries to work out which is which a very different problem arises with Eland Cables saying their BS7919, CENELEC HD22.4 S4, HO7RNF cable is rated 450/750V and Batt Cables saying their BS 6500 cable is rated 300/500V.
The Wiring Matters article gives a table on page 15 where BS 7919 Table 44 is for 110v and BS 6500 is for up to 300Vac single phase or 500Vac three phase.
Both cables are available in blue and yellow and both are found around caravan sites, and marinas where the proprietor is responsible for site safety but rarely responsible for providing the cable and between this and the way the BS7671:2008 asked for 2.5mm² cable at 25 meters long yet 1.5mm² cable is rated at 16A.
This means the guy has to decide if he is going to challenge his tenants over the suitability of the flex.
If it was ones own responsibility for all then one could use SY cable and have done with it but a little different when one has to condemn cable, which may be OK.
I would like to hear opinions on this?