• Maintain the minimum safe approach distance from all HV equipment at all times.
• Confirm that only HV Authorised Persons carry out switching and isolation operations.
• Follow the HV safety rules and permit system without deviation.
• Display warning signs and barriers around all HV equipment and compounds.
• Report any damage to HV cables, switchgear, or transformer enclosures immediately.
• Ensure HV isolation is proved dead with an approved HV voltage indicator.
• Apply HV earths after isolation before any work on HV equipment begins.
• Brief all site workers on the location of HV equipment and approach distances.
• Follow the specific emergency procedure for HV incidents — do not touch the casualty.
• Treat all cables as HV until confirmed otherwise by a competent person.

• DON'T approach within the safe distance of any HV equipment unless authorised.
• DON'T open HV switchgear, transformer doors, or enclosures without HV authority.
• DON'T touch or attempt to rescue a casualty in contact with HV equipment.
• DON'T excavate near HV cables without specific HV safety precautions in place.
• DON'T store materials or park plant against HV compounds or substations.
• DON'T work on HV systems without confirmed isolation, proving dead, and earthing.
• DON'T climb HV structures, poles, or pylons without specific authorisation.
• DON'T assume a cable is LV because it looks small — HV cables can be slim.
• DON'T bypass HV safety rules to save time — the consequences are fatal.
• DON'T carry long or tall items near HV overhead lines without a clearance check.

See also: Electrical Safety Awareness | Arc Flash Awareness