60364-5-52/FDIS ? IEC – 39 –
Table B.52.1 – Installation reference methods forming basis
of tabulated current-carrying capacities
Table and column
Current-carrying capacities
for single circuits
Thermoplastic
insulated
Thermosetting
insulated
Mineral
insulated
Number of cores
Reference method of installation
2 3 2 3 2 and 3
Ambient
temperature
factor
Group
reduction
factor
1 2