Electrical Equipment in Damp Areas

The placement of electrical equipment in damp areas (such as around showers, sinks, basins) is governed by zones designating relative areas of risk.

Internal Showers and basin/sink zones remain consistent with previous standards.

Clarification has been added for some typical shower door arrangements seen in current vehicle designs eg shower doors hinged part way along a door.

New requirements are included for external showers on recreational vehicles.

See clause 4.12 for recreational vehicles, clause 3.10 for relocatable units.

Zone Definitions – Internal Shower

    Refer clause 4.12.2.1. Diagrams can be found in Figure 4.7 of the standard (page 67).

    Zone 2 extends beyond a shower door if it is hinged at any place other than the corner of the shower cubicle.

    Zones are limited by solid surfaces (eg walls, corner-hinged doors):

    Diagrams can be found in Figure 4.7 of the standard (page 67).

    Zone Definitions – Other fixed Water Containers

    In RV installations these are generally sinks, basins

    The following requirements apply for a container with fixed water outlets and a capacity not exceeding 40L

    • Zone 0 – interior of the water container
    • Zone 2 – extends 150mm from the internal rim of the water container, between floor and a height of 400mm above the rim.
    • Note: there is no Zone 1 for this type of water container.

    Refer clause 4.12.2.2

    Diagrams can be found in Figure 4.8 of the standard (page 68)

    Sink/Basin Zones

    Sink/Basin Zones – diagram

    If the bench-top protrusion is less than 150mm, Zone 2 extends over the lip of the bench and down to the floor.

    Zone Definitions – External  Shower

    New requirements have been introduced for external showers

    • Zone 1 – the area 600mm each side of the fixed plumbing connection, from the ground to the height of the vehicle.
    • The zone wraps around onto the adjacent surface of a recreational vehicle to a total linear distance of 600mm from the plumbing connection.

    Refer clause 4.12.4 Diagrams can be found in Figures 4.9, 4.10 and 4.11 of the standard (pages 69-70)

    External Shower Zone

    Damp Areas – Equipment Selection

    Once the zones have been identified, equipment that can be installed within each zone is determined from Table 4.3 (page 69):

    ItemZone 0Zone 1Zone 2
    Power inlet socketNot permittedNot permittedNot permitted
    SwitchboardsNot permittedNot permittedNot permitted
    Power outlet socketNot permittedNot permittedRCD protected; and in a cupboard
    Switches and accessoriesNot permittedAs per Zone 2Not permitted <300mm from floor/ground Above that: IPX4 rating
    LampsIPX7 rating; and specifically for use; and ELV supply.IPX4 ratingIPX4 rating; or
    double or reinforced insulation (Class II); or ELV supply; or recessed in ceiling
    Other electrical equipmentIPX7 rating; and specifically for use; and ELV supply.IPX4 ratingIPX4 rating; or
    double or reinforced insulation (Class II); or ELV supply; or recessed in ceiling
    Power generation systemsNot permittedNot permittedNot permitted