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Lighting in Bathrooms

For electrical fittings the bathroom is divided into zones into by the NZ Electrical Code of Practice as below:

zone-bathZones about a bath

zone-closed-showerZones  Enclosed Shower

zone-open-showerZones open shower

IP Ratings for Light Fittings
Zone 0 Zone 1 Zone 2  Zone 3
IP X7 AND Safety ELV supply IP X4  Sealed Light fitting IP X4  Sealed Light fitting No IP Rating required
The X in the IP rating refers to the ability to resist dust and solid particles entering the light fitting.   This number is not specified but it should be at least 4.
Phone.  0800 695 444 or 09-475 6747 
PO Box 118, Rolleston, Christchurch 7643, NZ