PAT Testing Hall of Shame: The 5 Most Common (and Dangerous) Failures We Find in UK Facilities

Welcome to our virtual museum of electrical mishaps! As a Facility Manager, you’re the guardian of your building’s safety, but some of the biggest risks are the ones hiding in plain sight. Every day, our engineers are on the front line, uncovering hazards that could lead to fire, electric shock, or worse.

We’re pulling back the curtain to reveal our “Hall of Shame”—the top 5 most common and dangerous failures we find in UK workplaces, from pristine offices to busy workshops. This isn’t about scaremongering; it’s about awareness. By learning to spot these common culprits, you can become an even more effective guardian of your facility’s safety.

Let’s begin the tour…

Exhibit #1: The Serpent of Extension Leads

Expert’s Diagnosis:

This is a daisy chain: one extension lead connected to another. It increases the opportunity for excessive combined loading and damaged or loose connections. It does not create extra supply capacity. Use a correctly rated lead within its total load limit and arrange additional permanent sockets where needed.

What This Means for You:

Overloaded extension leads are a sign that your workspace has outgrown its electrical infrastructure.

• Action: Conduct regular walk-arounds, especially under desks and in communal areas, to spot and dismantle daisy chains.
• Policy: Educate staff on the dangers of overloading sockets.
• Solution: For areas with high demand for power, consider having a qualified electrician install additional wall sockets. It’s a safer and more permanent solution.

Exhibit #2: The Kitchen Catastrophe

Expert’s Diagnosis:

Scorch marks indicate overheating and require investigation. Possible causes include damaged contacts or a poor connection; a photograph alone cannot establish the cause. Stop using the affected appliance and socket, isolate safely and arrange a competent inspection.

What This Means for You:

Communal kitchens are high-risk zones. Appliances are used frequently and often with less care than personal items.

• Action: Encourage staff to immediately report any signs of discolouration, buzzing sounds, or strange smells from sockets or plugs.
• Inspection: Ensure these high-use areas are a priority in your testing schedule. A simple visual check can catch this before it becomes a fire.

Exhibit #3: The Taped-Up Terror

Expert’s Diagnosis:

Tape can conceal a split cable or damaged charger casing. Take the item out of use and have it assessed or replaced. Damage alone does not prove a charger is counterfeit; buy replacements from a reputable supplier and check compatibility with the equipment.

What This Means for You:

Employee-owned electricals are a major compliance headache, but you are still responsible for ensuring they don’t create a hazard in your workplace.

• Policy: You need a clear, formal policy for personal electrical equipment. Either prohibit them, or require that they are submitted for a safety inspection before being used on-site.
• Awareness: Remind staff of the dangers of using damaged or counterfeit chargers.

Exhibit #4: The Forgotten Flex

Expert’s Diagnosis:

This is the humble IEC lead, the power cord for almost every PC, monitor, and printer. It’s also one of the most abused and overlooked items in any office. Constant physical stress from being crushed under desks, trapped in drawers, or bent at sharp angles breaks down the cable’s internal insulation. This can lead to a short circuit or, worse, cause the live wire to make contact with a metal desk leg, making the entire desk live.

What This Means for You:

Good cable management isn’t just about looking tidy; it’s a critical safety measure.

• Action: During office moves or new equipment setups, ensure cables are routed safely and are not subject to physical stress.
• Inspection: Remember that the power lead is a separate appliance from the computer it’s plugged into. It needs its own visual inspection and, if necessary, its own test.

Exhibit #5: The Hidden Hazard

Expert’s Diagnosis:

A wrongly rated plug fuse can undermine protection of the flexible cable. Follow the appliance manufacturer’s specified BS 1362 fuse rating and have any uncertainty checked by a competent person. Cable appearance or appliance wattage alone is not a complete fuse-selection method.

What This Means for You:

This highlights the absolute necessity of a competent inspector.

• Competence is Key: An untrained person might not spot this. A qualified PAT testing engineer knows to check the fuse rating against the appliance’s power and cable thickness. It’s a fundamental check that is critical for fire prevention.
• Value of Professional Service: This is a perfect example of the value you get from a professional service—spotting the hidden dangers that a simple pass/fail machine can’t detect on its own.

Conclusion: Your First Line of Defence

This tour of our “Hall of Shame” isn’t about finding fault; it’s about preventing it. These common, everyday issues are the low-hanging fruit of electrical risk, and spotting them is your first and best line of defence.

A competent inspection can identify defects that an electrical test alone may miss. It is one part of ongoing maintenance, alongside user checks and action on faults. See how our reports and labels identify each item or request a workplace PAT quote.