5.2 Prevention

Grounding

Grounding creates a low resistance path from a tool to earth to carry away unwanted current. If there is a short circuit or lightning, the energy flows to ground and not through you.

• Ground power supply systems, circuits and equipment properly.
• Inspect electrical systems often to make sure that the path to ground is continuous.
• Inspect equipment before use.
• Never remove the ground prong from a tool or extension cord.
• Ground exposed metal parts of equipment.

Tool safety

• Wear gloves and suitable footwear.
• Store tools in a dry place and do not use them in wet or damp conditions.
• Light the work area and keep tools and cords from becoming tripping hazards.
• Do not carry a tool by its cord, and do not yank the cord to unplug it.
• Keep cords away from heat, oil and sharp edges.
• Disconnect tools when not in use and when changing blades or bits.
• Remove damaged tools from use.
• Use double insulated tools, inspect tools before use, use the right tool for the task and protect your tools.

Lockout and tagout of circuits

1. Apply locks to the power source after de-energising it.
2. Test with a meter that you know is working to verify that the circuit is dead.
3. Tag deactivated controls and power sources.
4. Tag de-energised equipment and circuits at every point where they could be energised.
5. The tag must say what equipment or circuit is being worked on.

Safety related work practices

• Use barriers and guards to keep people away from exposed energised equipment.
• Plan the work, post hazard warnings and use protective measures.
• Keep working spaces and walkways clear of cords.
• Use special insulated tools to work on fuses with energised terminals.
• Do not use worn or frayed cords and cables.
• Do not fasten extension cords with staples, hang them from nails or suspend them from wire.

A study aid, not published or endorsed by IOSH or OSHA. Laws and limits differ between countries.