Power cables and batteries

Checking Power Leads and Batteries on Tools

Whenever you are using hand tools or powered equipment, it is essential to check that the power lead or battery is safe, undamaged, and fit for use. These simple checks help prevent electric shock, equipment failure, and fire.

Inspecting Power Leads

Start by checking the power lead carefully, ensuring the tool is switched off and unplugged before you inspect it.

Common problem areas include:

• Where the cable enters the tool – this area experiences the most movement and strain
• The rubber strain relief – once this begins to degrade, the inner cable can become exposed
• Along the length of the cable – look for cuts, cracks, nicks, or signs it has been trapped in doors or machinery
• The plug – check it is intact, correctly sealed, and that the screws are secure

Follow the cable from the tool all the way to the plug. If there is any damage, the tool should be taken out of service immediately.

Fixed Machinery Checks

For fixed equipment such as bench grinders, apply the same principles:

• Follow the cable from the machine to the power source
• Check whether it is hardwired or plugged in
• Look for wear, strain, or damage along the entire length

These checks should be carried out regularly as part of routine safety inspections.

Battery-Powered Tools

When using battery-operated tools, ensure you are using the correct battery for the tool and brand. Batteries from different manufacturers are usually not compatible, and even within the same brand there may be multiple voltage options.

Key points to check include:

• The battery voltage matches the tool (e.g. 12V vs 18V)
• The correct charger is being used for that battery type
• The battery locks securely into place

Tools are usually designed so the wrong battery cannot be fitted, but it is still important to confirm you are using the correct one.

Battery Size and Weight

Batteries come in different capacities, measured in amp-hours (Ah). Larger batteries last longer but are heavier.

• Smaller batteries are better for short tasks and easier handling
• Medium-capacity batteries are often ideal for extended use
• Very large batteries can make hand tools heavy and difficult to control

Choose the most appropriate battery for the task to maintain control, comfort, and safety.

Protecting Battery Terminals

Many batteries have a protective cover over the terminals. Always refit this cover when the battery is not in use. This helps prevent:

• Dust contamination
• Accidental short-circuiting
• Damage to the terminals

Battery Charging and Fire Risk

Charging batteries always carries a small fire risk. To reduce this risk:

• Use only the manufacturer-approved charger
• Charge batteries in a well-ventilated area
• Do not leave damaged batteries on charge

If a battery overheats, smokes, or ignites, isolate the power immediately and use the appropriate fire extinguisher.

Dropped or Damaged Batteries

If a battery is dropped or the casing becomes cracked:

• Remove it from service
• Do not continue to use or charge it
• Dispose of it according to manufacturer and local guidance

Internal battery damage may not be visible but can significantly increase the risk of failure or fire.

Key Safety Reminders

• Inspect cables and batteries before use
• Remove damaged equipment from service immediately
• Use the correct battery and charger for the tool
• Store batteries correctly and protect terminals
• Dispose of damaged batteries safely

Regular checks and correct handling of power leads and batteries greatly reduce the risk of accidents, injuries, and equipment damage.