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What is Low Voltage?
According to the Australia and New Zealand Standards – Electrical Wiring Rules AS/NZS 3000:2018 low voltage is anything "Not exceeding 12 Volts AC or 30 Volts ripple-free DC".

What does “Wet Area Suitable” mean?
Products that are “Wet Area Suitable” have a suitable IP (Ingress Protection) rating that enables them to be installed in what is classified as Zone 1 in the bathroom. See Bathroom Zones 

Bathroom Zones
The Australia and New Zealand Standard AS/NZS 3000:2018 identifies the zones in a bathroom and the IP rating required for electrical items installed in each zone. The illustration shown here is a guide only, for full details please refer to Australia and New Zealand Standard AS/NZS 3000:2018.

Fittings, electrical appliances and light fittings

Zone 0

Zone 1

Zone 2 Zone 3
Light fittings IPX7 and Safety ELV supply IPX5 Sealed light fitting IPX 4, As for Zone 1Class II, Exterior ball fitting ELV No IP rating
Electrical appliances IPX 7 and specifically designed and safety ELV IPX5 Instantaneous water heaters, fans IPX4 Heated towel rails, fans No IP rating
Source: New Zealand Electrical Code of Practice for Homeowner/Occupier’s Electrical Wiring Work in Domestic Installations

PLEASE NOTE: Electrical Connections
All electricity connections and possible subsequent electric interventions must only be done by a qualified electrician who will operate in accordance with current regulations in terms of electricity.