Caution - Please use for Guidance ONLY
NO guarantee as to the accuracy of these values is given or
All values should be checked against some other source.
Twin & Earth or Three Core & Earth
S.W.A Xlpe ( TLC - Standard SWA )
Xlpe thermosetting insulation giving an increased current carrying
S.W.A with standard Pvc insulation.
Pvc insulated with Tough Pvc thermosetting
insulation giving an increased current carrying capacity.
building sites and some garden and other tough conditions.
Basis for Calculations:
Cables are not grouped or
Ambient temperature 30°C
SWA Xlpe - Conductor
SWA Pvc - Conductor temperature 70°C
& E - Conductor temperature 70°C
Hituf - Conductor
Allowances MUST be made for operating
temperatures outside the above,
for correction factors refer to the
full IEE 16th edition regulations for tables.