SNZ AS/NZS 3017
Electrical Installations - Verification Guidelines
|Publication Date:||5 November 2007|
This Standard sets out some of the common inspection and test methods required to verify that a low voltage, multiple earthed neutral (MEN) (TN-C-S) electrical installation complies with safety requirements for the prevention of fire, or a person or livestock from sustaining an electric shock.
The tests detailed in this Standard are as follows:
(a) Earthing system continuity and resistance;
(b) Insulation resistance;
(d) Correct circuit connections;
(e) Phase sequence;
(f) Fault-loop impedance;
(g) Verification of operation of residual current devices;
(h) Earth electrode resistance;
(i) Touch voltage; and
(j) Continuity and resistance of the incoming neutral.
The Standard illustrates testing procedures for an electrical installation connected to an MEN system of earthing. The equipment and methods:
(k) Are not exclusive and other equipment and methods may be used;
(l) May be applied to types of low voltage installations other than MEN; and
(m) May be applied to work affecting only part of an installation, e.g. alterations, additions or repairs.