What is the maximum allowed load on a single lighting sub-circuit?

800 Watts or a maximum of 10 points (lights/fans/5A sockets).

What is the limit for a power sub-circuit?

3000 Watts or a maximum of 2 power outlets (15A/16A sockets).

At what height should standard switchboards be installed?

Typically at 1.5 meters above the finished floor level.

Can power and lighting circuits share the same conduit?

No, it is highly recommended to run power and lighting circuits in separate conduits to prevent interference and heating issues.

IS 2274

: 1976

Code of practice for electrical wiring in residential buildings

CurrentFrequently UsedCode of PracticeBIMMEP · Electrical Installations

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This standard provides guidelines and a code of practice for the design, layout, and installation of electrical wiring in residential buildings to ensure safety, efficiency, and adequacy of electrical points.

Lays down recommendations for the design, installation, and maintenance of electrical wiring installations specifically in residential buildings.

Quick Reference Values

max load lighting subcircuit800 W

max points lighting subcircuit10 points

max load power subcircuit3000 W

max points power subcircuit2 points

standard switchboard height1.5 m above floor level

min ceiling fan clearance2.4 m from the floor

min wall light height2.25 m from the floor

Practical Notes

Always separate lighting sub-circuits from power sub-circuits to isolate heavy load faults.

Switchboards should be located immediately inside the room near the entrance door for easy access.

Proper diversity factors must be applied during load estimation to prevent excessive oversizing of cables and main distribution boards.