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What requirements apply when a new circuit is installed?

All the requirements of AS/NZS 3000 apply including safety switches protection.

Does the addition of a socket–outlet require safety switch protection?

Yes - 30mA RCD protection shall be provided where any alteration to an existing final sub-circuit is undertaken.

Does the addition of a device to an existing lighting circuit without RCD protection need to be protected by an RCD?

Yes, this is an alteration to the original circuit. Addition of devices such as combination fan, light and heater unit or an exhaust ceiling fan or a smoke detector or a ceiling sweep fan (with an unswitched socket outlet) must be protected by an RCD.

Is the replacement of an item of electrical equipment considered a repair?

Yes. Provided it does not alter the characteristics of the circuit.

Does the replacement of an exhaust fan require safety switch protection?

30mA RCD’s need not be installed where a single item of electrical equipment, that is not RCD protected, is replaced with an equivalent item in the same location. If the equipment is protected by fuse or MCB they can remain. Although it is recommended for safety to make sure all circuits are RCD protected.

Can I replace like for like a switchboard?

No. Where ALL of the circuit protection on a switchboard is replaced, additional protection by RCDs shall be provided for the final sub-circuits supplied from that switchboard. It is most likely that the switchboard to be replaced will have at best only the light and power-outlet circuits protected.

Can a socket–outlet added to an existing circuit be protected by an RCD incorporated into the socket–outlet?

Yes, although it is preferable to locate the RCD in the switchboard to protect the complete circuit rather than installing an RCD that protects only the individual socket-outlet.

Can I install a IP23 meterbox outside?

Yes in areas under eaves, veranda or similar overhang require electrical equipment to be IP33. This excludes meter boxes that only require IP23.