NECA Technical often receive enquiries regarding what mandatory testing is required for installations. The requirements for testing are outlined in section 8 of AS/NZS 3000:2018 and the mandatory tests are covered by clause 8.3.3 below.
8.3.3 Mandatory tests
220.127.116.11 Low voltage (AMDT No. 1 JAN 2020)
* Testing shall be carried out on parts of electrical installations designed to operate at low voltage as follows:
(a) Continuity of the earthing system (earth resistance of the main earthing conductor, protective earthing conductors, PEN conductors and bonding conductors), in accordance with Clause 8.3.5.
(b) Insulation resistance, in accordance with Clause 8.3.6.
(c) Polarity, in accordance with Clause 8.3.7.
(d) Correct circuit connections, in accordance with Clause 8.3.8.
(e) Verification of impedance required for automatic disconnection of supply (earth fault-loop impedance), in accordance with Clause 8.3.9.
(f) Operation of RCDs, in accordance with Clause 8.3.10.
* Exception: Verification of earth fault loop impedance may be omitted where automatic disconnection of supply (refer to Clause 18.104.22.168) is not the method used to provide fault protection.
It should also be noted that it is a legislative requirement in Western Australia to retain test results for five years.