scope:

This standard applies to switchgear and controlgear for industrial use having rated voltages not exceeding 1000 V a.c. and 1200 V d.c. It is based on the uniform system of terminal marking specified in IEC-Publication 445-1973. The use of this system is recommended for the terminal marking of devices which are frequently contained in low voltage switchgear and controlgear assemblies, when such marking is a requirement of the relevant equipment standard or is usual practice. Where an identifying colour, in accordance with a recognized system, is applied to an apparatus terminal, the correlation between this colour and the equivalent graphical symbol or the alphanumeric notation according to this standard shall, where necessary, be recorded on an associated drawing or document.