Bathroom Lighting Guide — Zones, Regulations & Ideas
Bathroom lighting is governed by strict safety zones under UK wiring regulations. Understanding the zones helps you choose the right fittings and avoid dangerous mistakes.
Bathroom lighting is one area where safety regulations are particularly important. The UK wiring regulations (BS 7671) define bathroom zones that restrict which types of light fittings can be used in each area.
Zone 0 is inside the bath or shower itself. Only 12V SELV (Safety Extra Low Voltage) fittings with an IPX7 rating are permitted here. Zone 1 is directly above the bath or shower to a height of 2.25m — fittings must be at least IPX4 rated. Zone 2 extends 600mm beyond the bath or shower rim — IPX4 rated fittings are required.
Outside these zones, standard light fittings can be used, but all bathroom lighting circuits must be protected by an RCD (Residual Current Device) and all electrical work must be certified under Part P.
For a practical and attractive bathroom lighting scheme, combine recessed downlights for general illumination with a dedicated mirror light or illuminated mirror cabinet for task lighting. Dimmer switches (outside the bathroom zones) allow you to adjust the mood.
IK Master Build Ltd include all bathroom electrical work in-house, with full Part P certification. Call 07402 059 555 to discuss your bathroom lighting requirements.