Could an unfused R.C.D. protected spur, from a complient ring final circuit, supplying a single outdoor socket via 1.5mm2 6242Y cable of max. length 300mm through a brick wall from an indoor socket outlet be considered compliant?
That constant of 115 is not of course related to the ultimate failure temperature of the copper core, or anything like it, just that it has got hot enough to begin to damage the PVC on either side of it, and repeated faults at this level may lead to core to core shorts within the cable too.
If you are only worried about failure of the CPC itself (as in melting metal), then it needs to go up by a factor of about 20. By which time the insulation has well and truly bought it.
That constant of 115 is not of course related to the ultimate failure temperature of the copper core, or anything like it, just that it has got hot enough to begin to damage the PVC on either side of it, and repeated faults at this level may lead to core to core shorts within the cable too.
If you are only worried about failure of the CPC itself (as in melting metal), then it needs to go up by a factor of about 20. By which time the insulation has well and truly bought it.
