Standards Overview

A. General Wiring Standards

• Single-core PVC cables drawn through surface-mounted or concealed PVC conduits.
• Color coding: Brown (Live), Blue (Neutral), Green/Yellow (CPC/Earth).
• Bond all metal casings of exhaust fans and luminaires to the CPC.

B. Lighting & Fan Schematic (Radial)

1.5 sqmm cable from 10A MCB to the multi-gang switch box; from there, switched lives + neutral + CPC to each zone. Emergency lights receive an unswitched live feed on the same circuit to keep batteries charged and operate on mains failure.

C. Power Socket Schematic (Radial)

Topology

Radial circuit.

Routing

4 sqmm from 32A MCB → first 13A double socket → second 13A double socket.

Rationale

Economical and straightforward for two outlets when 4 sqmm cable is used.