Extract from AS/NZS 3019:2007
3.2 Inspection Requirements
(a) Cables show no undue evidence of insulation or sheath deterioration and have appropriate mechanical protection for the environment in which they are installed;
(f) Switchboard and electrical equipment have no conductor insulation deterioration.
4.2 General
(e) There is adequate insulation and distance between live conductors and between live conductors and earth.