Electrical hazards at work include electric shock, burns, arcing, electrical fires and explosions, as well as secondary injuries such as falls after a shock. Employers and other dutyholders should identify where these risks can arise, keep electrical systems and equipment in a safe condition, remove damaged equipment from use and make sure electrical work is carried out by people with the competence needed for the task.
Key Takeaways
- Damaged leads, plugs, sockets, machinery and fixed wiring can create shock, burn and fire risks.
- Electrical equipment must be suitable for both its intended use and the environment in which it is used.
- Maintenance and testing should be proportionate to risk; UK law does not impose a blanket annual PAT test on every portable appliance.
- Burning, sparking, exposed live parts or dangerous overheating should be treated as an immediate safety issue rather than a routine maintenance job.
What Are the Main Electrical Hazards in a Workplace?
Workplace electrical risk is not limited to someone touching a bare live wire. The Health and Safety Executive identifies electric shock and burns, arcing, fire, explosion and ignition of flammable vapours or dusts among the principal hazards associated with electricity at work.
A shock can also cause a secondary accident. Someone working on steps, a ladder or another raised position may fall after an electrical contact even when the electrical injury itself is not the only source of harm.
Damaged Cables and Plugs
Split insulation, exposed conductors, damaged plugs, crushed leads and temporary tape repairs can leave normally protected parts unsafe to touch.
Faulty Sockets and Connections
Loose, damaged or overheated connections can lead to localised heating, arcing and fire as well as unreliable operation of equipment.
Unsuitable Equipment
Equipment that is acceptable in a dry office may not be suitable for a wet, dusty, corrosive or otherwise demanding environment.
Overloaded Electrical Points
Overloaded socket-outlets, unsuitable adaptors and poorly managed temporary supplies can create overheating and fire risks.
Work on or Near Live Parts
Maintenance, alteration or testing near energised equipment carries a higher level of risk and requires suitable working methods and competent people.
Overhead and Underground Supplies
Construction, maintenance and external work may expose workers to overhead lines or concealed underground cables even when those hazards are not obvious from the work area.
What Does UK Workplace Electrical Safety Law Require?
For workplaces in Great Britain, the principal electrical legislation is the Electricity at Work Regulations 1989. HSE guidance explains that the Regulations are intended to control risks arising from electrical systems, equipment and work carried out on or near them.
The practical requirement is not simply to own test certificates.
Electrical systems must be constructed and, where necessary to prevent danger, maintained so far as is reasonably practicable to prevent that danger. Work activities involving electrical systems must also be carried out so that they do not give rise to danger so far as is reasonably practicable.
This makes electrical safety an ongoing management issue. The dutyholder needs to consider the equipment being used, how it is used, who may be exposed, foreseeable fault conditions and the environment in which the equipment operates.
Northern Ireland has separate legislation: the Electricity at Work Regulations (Northern Ireland) 1991. The Health and Safety Executive for Northern Ireland similarly advises systematic checks of electrical systems and portable equipment and competent people for electrical work.
Electrical Equipment Must Suit the Working Environment
The condition of an electrical item cannot be judged separately from where and how it is being used. Moisture, dust, impact, movement, heat, corrosive substances and flammable materials can all change the level of protection an electrical system or piece of equipment needs.
HSE specifically warns that unsuitable equipment in wet surroundings can become dangerous. Equipment, plugs, sockets, cables, protective devices and isolation arrangements therefore need to be suitable for the conditions that can reasonably be expected in that workplace.
This distinction is particularly relevant to workshops, hospitality premises, plant areas, construction sites and other environments where electrical equipment may be moved frequently or exposed to conditions very different from a normal office.
Portable Equipment, Visual Checks and the PAT Testing Myth
Portable electrical equipment should not remain in use simply because its next scheduled test date has not arrived. HSE advises users to look for obvious damage and to remove equipment from use immediately where plugs or connectors are damaged, cables have unsafe repairs or exposed conductors, or there are signs of overheating.
The inspection and testing regime should reflect the actual risk. Equipment that is frequently moved, used heavily or exposed to wet, dusty or damaging conditions will usually need more attention than low-risk equipment such as a desktop computer in a controlled office environment.
Where formal appliance inspection and testing forms part of that risk-based maintenance programme,
workplace PAT testing
should remain focused on portable and plug-connected equipment. It is not a substitute for assessing the condition of the fixed electrical installation.
Do Fixed Workplace Electrics Need Maintenance as Well?
Yes. Workplace electrical safety includes the fixed installation as well as portable equipment. HSE advises arranging inspection and testing of fixed wiring installations so deterioration does not develop into danger.
Depending on the premises, this may involve circuits serving lighting, socket-outlets and wired-in equipment, together with the associated distribution and protective arrangements. The exact inspection or maintenance scope should be based on the electrical installation itself rather than simply on the room name or type of business occupying the premises.
Businesses planning routine work on fixed systems can
arrange electrical maintenance
according to the condition and requirements of the installation.
For a wider explanation of maintenance planning rather than individual hazards, the separate guide to
preventative electrical maintenance for homes and businesses
covers that subject in more depth.
Electrical Warning Signs Staff Should Not Ignore
A workplace does not need to wait for an electric shock before treating an electrical condition as unsafe. Visible damage and changes in normal operation can provide an earlier warning that equipment or the fixed installation needs attention.
- split, crushed or exposed cable insulation;
- damaged plugs, connectors, sockets or isolators;
- burn marks, melting or other signs of overheating;
- sparking or crackling from electrical equipment;
- a persistent electrical burning smell;
- equipment or accessories becoming abnormally hot;
- repeated operation of circuit-breakers or RCDs;
- equipment cutting out or behaving unpredictably;
- accessible electrical parts that appear loose, broken or exposed.
Damaged equipment should be removed from use rather than left available with a verbal warning for the next person. Repairs and electrical investigation should be carried out by someone with the skills, knowledge and experience required for the work involved.
Who Is Responsible for Managing the Risk?
Electrical safety at work is not transferred automatically to an outside contractor simply because a business uses one for testing or maintenance. HSE describes employers, the self-employed and employees as dutyholders under the Electricity at Work framework, with duties applying according to the matters within their control.
A sensible workplace system therefore needs clear responsibility for reporting defects, removing unsafe equipment from use, arranging appropriate inspection or maintenance and making sure electrical work is assigned to competent people.
HSE also notes that maintenance records can help demonstrate compliance and monitor equipment condition, although its guidance on Regulation 4 explains that keeping maintenance records is not itself a specific legal requirement under that regulation.
What Should a Business Do When an Electrical Hazard Is Found?
The first response should match the level of danger. A damaged laptop lead that can be unplugged and quarantined is different from active sparking at a distribution board or smoke coming from fixed electrical equipment.
For a non-active defect
Stop using the affected item or circuit where it is safe to do so, prevent other people from putting it back into service and arrange appropriate inspection or repair. If the cause is unclear — for example repeated tripping, intermittent loss of power or an unexplained electrical symptom —
have the electrical fault investigated
rather than repeatedly resetting protective devices.
For an immediate electrical danger
Active sparking, smoke, burning, exposed live parts or dangerous overheating should not be treated as a routine maintenance issue. Keep people away from the hazard and arrange
urgent electrical help
where prompt electrical attendance is needed.
Official Guidance & References
The legal and workplace-safety points in this guide have been checked against the following official sources.
Need Workplace Electrical Maintenance in London?
If damaged accessories, deteriorated wiring or other fixed electrical issues have been identified at your workplace, the next step is to assess the affected installation and define the work required rather than leave the defect in service.
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