Why You Must Replace Damaged Electrical Cables 

A damaged mains lead can expose people to shock or create an overheating risk. Stop using the affected equipment, disconnect it if safe and have the damage assessed. Do not wait for the next PAT visit to act.

What damage should you look for?

• Cuts, splits or exposed inner cores.
• Crushing, a loose cable grip or damage where the lead enters the plug or appliance.
• Heat damage, scorching or unusual stiffness.
• Taped joints or other unsuitable repairs.

Light surface scuffing and deeper insulation damage are not the same, but uncertainty should be resolved by a competent person before continued use.

Replace the lead or arrange a competent repair

A detachable lead can often be replaced with one of the correct type and specification. An attached cable may require repair by someone competent to work on that appliance. Do not improvise a join or cover damage with tape.

The replacement must suit the appliance, connector, supply and environment. Arrange any inspection and testing needed before return to service.

What employers need to manage

The duty is to maintain electrical equipment to prevent danger. A label or previous pass does not excuse continued use after damage develops. Keep a record of the defect, action taken and any follow-up checks.

Fixed wiring has a different inspection and repair scope. Building Regulations requirements vary with location and type of work; Part P is not a universal rule for every commercial cable repair.

Further guidance: HSE advice on equipment condition and damaged cables.

Prevent the next damaged cable

Route leads away from doors, wheels, sharp edges and heavy furniture. Avoid pulling equipment by its cable. Review damage patterns when deciding inspection intervals rather than automatically testing everything every six or twelve months.

How PAT testing helps

Inspection can identify damage and unsuitable repairs; appropriate electrical tests can find some defects that are not visible. It cannot guarantee that a cable will remain safe after the visit.

AiO is based in Christchurch and serves the South and South West. Our report and label examples show how findings can be linked to individual items.

Frequently asked questions

Does each detachable mains lead count separately? Yes, for AiO’s testing and quotation process. See what counts as an appliance before estimating your total.

Can a damaged cable be used until the next appointment? Keep it out of use until assessed and made safe.

Does a PAT report guarantee an insurance claim? No. It can support your maintenance records, but cover and claims depend on the policy and circumstances.

Planning a workplace visit? Get a PAT testing estimate or see our reports and labels before you book.