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Zones for positioning electrical fittings around the bath.

Bathroom zones

For the purpose of wiring regulations, bathrooms are divided into four zones, in accordance with the Australian/New Zealand Wiring Rules (AS/NZS 3000:2007). These are as follows:

Zone 0 - This covers interior area of the base of the bath or shower.

Zone 1 - This zone is divided into three sections, depending on what you have installed:

• Bath - For a bathtub, Zone 1 is the vertical area from the inner rim of the bath to the ceiling, or 2.5m above the rim, whichever is lower (this usually encompasses zone 0 too).
• Shower over a bath - The area with a horizontal radius of 1.2m from the fixed plumbing connection of the shower (i.e. 1.2m out from the shower outlet).
• Shower - The area with a horizontal radius of 1.2m from the fixed plumbing connection of the shower. The vertical boundaries of this area extend from the floor to the ceiling, or up to 2.5m above the floor, whichever is lower. 

Zone 2 - This is the area with a horizontal radius of 0.6m out from Zone 1, and a height of 2.25m above the floor (or to the ceiling, whichever is lower).

Zone 3 - This is the area with a horizontal radius of 2.4m out from Zone 2. The vertical boundaries of this area extend from floor to ceiling or up to 2.5m above the floor, whichever is lower