"Andy Wade" wrote in message
...

There's no prescribed scheme for circuit numbering, if that's what you
mean. The relevant requirements for identification a

Reg. 514-01-01 requires that the purpose of each item of switchgear and
controlgear is indicated, unless it's obvious.

514-01-02 requires wiring to be arranged so that it can be identified
for inspection, testing, repair or alteration, "as far as is reasonably
practicable."

514-03-xx to 514-07-xx are concerned with identification of conductors
by means of the usual (old or new) colours.

514-08-01 requires each protective device (fuse, MCB or RCD) to be
identified so that the circuit(s) protected "may be easily recognised."

514-09-01 requires documentation to be provided in the form of "a
legible diagram, chart or table" (or equivalent) listing or detailing
the following:
- type of each circuit, (locations of) points served, cable size & type,
- how indirect contact protection is provided (i.e. EEBADS),
- information necessary to identify each device for protection,
isolation and switching,
- details of any items vulnerable to normal testing.
For a domestic installation this information is usually given in the
electrical installation certificate.

Much obliged Andy for your comprehensive reply, it's exactly the information
I wanted. Since I'm retired I don't have access to IEE regs any more.
Best regards
Tom