Bathroom Zone Height

Zone 2 for a bathroom is the same height as zone 1 (2.25m) extended to 0.6m around the bath. The extent of the zones in a bath or shower room can be limited by floors, ceilings and walls. The bathroom zones are as follows: Zone 0: The area inside the bath or shower - this would also apply to shower enclosures and wet rooms too.

Zone 1: The area above the bath or shower up to a height of 2.25 from floor level. Zone 2: The area reaching 0.6m outside the bath's perimeter, up to a height of 2.25m from the floor. Learn how to safely install electrics into bathroom zones, showers, or wet rooms using your bs7627 18th edition guide.

Equipment is either in a zone or outside a zone and this can be easily determined by measurement. The height of zone 1 and zone 2 are limited either by the horizontal plane corresponding to the highest fixed shower head or water outlet, or the horizontal plane lying 2.25 m above the finished floor level, whichever is higher. Zone 2 is an area stretching 0.6m outside the perimeter of the bath and to a height of 2.25m from the floor.

In these bathroom zones an IP rating of at least IP44 is required. Zone 1 is the area above the bath or shower to a height of 2.25m from the floor. In this zone a minimum rating of IP45 is required but it is generally accepted that IP65 is to be used.

Bathroom zones are predefined areas within a room containing a bath or shower and determines the requirements and regulations which need to be adhered to, including the minimum IP ratings of electrical equipment and accessories in each zone, as set out by BS 7671 Wiring Regulations, each zone is defined as zone 0, zone 1 and zone 2. These bathroom zones are not just restricted to bathrooms. Zone 2 extends 0.6 metres outside the perimeter of the bath and to a height of 2.25 metres from the floor.

It also covers the area around washbasins within a 60. For zone 0, light fittings need to be at least a minimum of IP67 which means immersion proof. Lights used in zone 0 will also need to be low voltage, with a maximum of 12V.

Zone 1 This is the area of the bathroom that is directly above the bath tub and the shower, up to a height of 2.25m from the bathroom floor and at a 1.2m radius from water. Zone 1 is the area above the bath or shower tray to a height of 2.25m from the floor. In this zone a minimum rating of IP44 is required and elements must also be protected by a 30mA residual current device (RCD) to protect the circuit.