High voltage isolation
High voltage presents higher levels of hazards which also apply to isolation and access.
Hazard identification
Additional hazards include:
- induction from other circuits and communications equipment such as radio transmitters
- build up of static charges due to weather conditions
- feedback from secondary or tertiary systems
- stored energy in high voltage capacitor banks
- working under or over other live conductors.
Find out what other types of risks there are for high voltage isolation and access in the Electrical Safety Code of Practice 2010 - Electrical Work (PDF File, 740.7 KB).
Control measures
People near exposed live high voltage parts must keep the safe approach limits detailed in Electrical Safety Regulation 2002 (PDF File, 1.02 MB).
If you are within the safe approach limits, the parts must be isolated, tested and proved de-energised and earthed. Refer to Section 13 Requirements for electrical work of the Electrical Safety Regulation 2002 (PDF File, 1.02 MB).
Section 3.4.3 of the Electrical Safety Code of Practice 2010 - Electrical Work (PDF File, 740.7 KB) details the process of proving de-energised status as well as Appendix B4 which provides information on the safe system of work that must be used for high voltage isolation and access.