4.6.2 - Identification of fixed wiring conductors
Colour is used to identify the conductors
of a wiring system where it is possible to colour the
insulation. Where it is not, numbers are used. The requirements
for identification of fixed wiring are shown in {Fig 4.21}.
There is as yet no requirement to use brown and blue to
identify the phase and neutral conductors of fixed wiring,
although this applies to flexible cords and cables (see
{4.6.3}.
The colour green on its own is prohibited, although green
and yellow stripes identify the protective conductor. The
functional earth conductor for telecommunication circuits
is identified by the colour cream.
Fig 4.21 Identification
of fixed wiring
Some cables comply with HD 324:1977 and
have blue insulation on the neutral conductor. This colour
does not comply with BS 7671 and if such cables are used,
they must be correctly identified at their terminations
by the use of black cable markers or black tape.
|
