Current-carrying capacity
Iz
The current a cable can carry continuously in its installed conditions without its insulation exceeding the temperature it was designed for. Tabulated values assume reference conditions; the real, installed capacity is what remains after for temperature, grouping and insulation have taken their share.
Where to look it up: BS 7671 Appendix 4.
Taught and practised in the Installation section.
Practise it in context
Related terms
Definitions are a start — the exam wants you to use them.
Practise free