Reference notes on recognising damaged equipment, unsuitable connections and warning signs during everyday use.
If you see smoke, sparking or serious overheating, keep people away and follow your emergency arrangements. Only disconnect or isolate the supply if it is safe to do so.
An extension lead’s total load limit applies across all of its outlets. Count the load of every connected appliance and check the product’s marked rating. Empty sockets do not mean there is spare capacity.
Do not use a universal 3,000W rule for all sockets, adaptors or reels. Their ratings and installation conditions matter. High-load equipment should be connected as its manufacturer directs; ask an electrician to assess an area that lacks suitable outlets.
Cracked casings, damaged pins, loose cable anchorage, exposed inner cores and heat damage all need attention. Stop using the affected item and report it. Do not disguise damage with tape.
A competent person should decide whether the plug, lead or appliance can be repaired or needs replacement, and what checks are needed before it returns to use.
Connecting one extension to another does not add capacity. It adds connections and makes it easier to lose track of the total load carried by the first lead.
Use one suitable extension within its rating, keep its cable protected and arrange permanent sockets where appropriate. Surge protection limits certain voltage transients; it does not make an overloaded or daisy-chained setup safe.
If a plug does not fit properly, stop. Do not force it, bend pins or improvise adaptors. Damage or an incompatible plug needs a suitable replacement or competent assessment.
Never insert tools or fingers into a socket to remove a broken pin. Prevent use of the socket and arrange safe isolation and repair by an electrician.
Unusual heat, scorching, burning smells, crackling or recurring protective-device trips require investigation. The symptom alone does not identify the cause. Do not repeatedly reset a device while leaving the fault unresolved.
A socket or fixed-wiring defect needs an electrician. PAT testing covers the agreed equipment scope and does not certify the socket circuit. Keep the suspect equipment and outlet out of use pending assessment.
Give staff a clear way to report defects and make sure failed equipment cannot quietly return to service. Review cable routes after desk moves and temporary setups, and include detachable leads and extensions in the equipment list.
If a plug, socket or cable is damaged, stop using it and have it checked by a competent person.
An earlier PAT label does not make later damage safe. Stop using damaged equipment and report it for assessment.
Further guidance: Electrical Safety First extension-lead advice.
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