Extract from AS/NZS3019:2001

(c) Conductors of cables are correctly identified and are connected to the correct terminals of fittings;

(j) Exposed metal liable to become alive is connected to earth.

Polarity testing shall be performed to the extent that it is reasonably practical, with any significant omission being reported. Testing is intended to confirm the following:

(a) Every single-pole switch or protective device of the electrical installation operates in the active conductor of the circuit in which it is connected; and

(b) Every RCD operates in the active conductor of the circuit(s) to which it is connected, and in the neutral conductor as specified in AS/NZS 3000.