Bathroom Regulations

ZONING

This page is given for guidance only, always refer to the current IEE Wiring Regulations and ensure that you are guided by the latest regulations/code of practice.

Locations containing a bath, a shower or a cabinet containing a shower and/or bath are defined as areas of increased electrical hazard. The requirements for safety for these locations are based on the application of a zonal concept, the particular requirements for each zone and beyond being based on the perceived degree of risk of electric shock.

• Zone 0 the interior of the bath tub or shower tray
• Zone 1 above the bath tub or shower tray to a height of 2.25m
• Zone 2 an area extending 0.6m beyond the bath tub or shower tray and above the bath if over 2.25m
• Zone 3 an area extending 2.4m from the outer limit of Zone 2 to a height of 2.25m

USE OF EQUIPMENT

Any electrical item approved for use in a zone may also be used in another zone with a higher number, but not in a lower number zone.
Zone 0 requires electrical products to low voltage (max. 12V) and be IPX7
Zone 1 requires electrical products to be IPX4 or better, or SELV with the transformer located in zone 3 or beyond. If the fitting is 240V, a 30mA RCD must be used to protect the circuit.
Zone 2 requires electrical products to be IPX4 or better or SELV with the transformer located in zone 3 or beyond.
Zone 3 the regulations do not specify any IP number for zone 3, however reference should be made to the manufacturers data in case it indicates any exclusion. Portable electrical equipment is not permitted other than that using a SELV or shaver unit.