• Use 110 volt tools and equipment on site wherever possible.
• Visually inspect all leads, plugs, and equipment before every use.
• Ensure all temporary electrical installations are set up by a qualified electrician.
• Use RCDs on all 230 volt supplies and test them daily before use.
• Report any damaged cables, broken plugs, or scorched sockets immediately.
• Keep electrical equipment dry and never handle plugs or tools with wet hands.
• Confirm isolation and prove dead before working on any electrical system.
• Identify overhead power lines before using cranes, MEWPs, or tall plant nearby.
• Check PAT test labels are current on all portable equipment before use.
• Follow the permit to work procedure for all electrical isolation activities.

• DON'T use 230 volt tools on site unless no 110 volt alternative exists.
• DON'T use equipment with damaged leads, cracked casings, or missing guards.
• DON'T carry out any electrical work unless you are a qualified electrician.
• DON'T bypass, remove, or bridge RCDs or other safety protection devices.
• DON'T ignore sparking, burning smells, or tripping circuits — investigate immediately.
• DON'T use electrical equipment in rain or standing water without proper protection.
• DON'T assume a circuit is dead — always test with a proving unit before touching.
• DON'T raise plant, ladders, or scaffolding near overhead power lines without a plan.
• DON'T daisy-chain extension leads or overload socket outlets on site.
• DON'T attempt to repair electrical faults yourself — report and isolate the supply.

See also: Overhead Power Lines | Isolation & Safe Systems of Work