Fire Safety Course: Awareness Training for Electricians

Electrical faults are one of the leading causes of fire in UK buildings. According to government fire statistics, faulty electrical equipment and installations account for thousands of dwelling fires each year, with construction sites also experiencing a disproportionate number of fire incidents. As the professionals who design, install, and maintain electrical systems, electricians have both a unique responsibility and a unique ability to prevent electrical fires.

Fire safety awareness goes beyond knowing where the nearest exit is. Electricians need to understand how their daily work creates fire risks — from soldering joints near combustible materials to installing circuits that could overheat if incorrectly rated. They also need to know how to respond effectively if a fire does break out, including selecting the correct extinguisher for an electrical fire and executing a safe evacuation.

The Regulatory Reform (Fire Safety) Order 2005 makes fire safety training a legal requirement for all employees in workplaces covered by the Order. For electricians, this includes understanding fire risk assessments, hot works permits, and their personal responsibility to prevent fires through good workmanship and compliance with BS 7671 wiring regulations.

Every fire requires three elements to sustain combustion: heat (an ignition source), fuel (a combustible material), and oxygen (from the air). Removing any one of these three elements extinguishes the fire. This principle — the fire triangle — is the foundation of all fire prevention and fire-fighting strategies.

For electricians, the most common ignition sources in their work include overheating electrical connections, arc faults, soldering irons, heat guns, angle grinders, and temporary lighting. Common fuels on construction sites include timber frameworks, insulation materials, cardboard packaging, cable insulation, and solvents. Understanding these risks allows you to take practical prevention measures — clearing combustible materials before using heat-generating tools, maintaining adequate ventilation, and ensuring electrical connections are tight and correctly rated.

Fires are classified into six classes based on the fuel involved: Class A (solid materials such as wood and paper), Class B (flammable liquids), Class C (flammable gases), Class D (metals), Class F (cooking oils and fats), and electrical fires involving live equipment. Each class requires a specific type of extinguisher — using the wrong type can be ineffective or dangerous.

Selecting the correct fire extinguisher is critical, particularly for electricians who may encounter fires involving live electrical equipment. The five main types of portable fire extinguisher available in the UK are water (red label), foam (cream label), CO2 (black label), dry powder (blue label), and wet chemical (yellow label).

For electrical fires, the CO2 extinguisher is the preferred choice. It works by displacing oxygen around the fire, smothering the combustion process. CO2 leaves no residue, making it safe for use on electrical equipment, computer servers, and distribution boards without causing additional damage. Important safety note: CO2 extinguishers can cause frostbite if the horn touches the skin, and they reduce oxygen levels in enclosed spaces — ventilate the area after use.

Dry powder extinguishers are effective on electrical fires but leave a corrosive powder residue that can damage sensitive equipment. They are best used as a multi-purpose extinguisher on construction sites where fires may involve mixed materials. Water and foam extinguishers must never be used on live electrical equipment as the water stream conducts electricity and creates an electrocution risk.

Test your extinguisher knowledge with interactive quizzes

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Hot works — any process that generates sparks, open flames, or significant heat — require formal management on construction sites and in occupied buildings. For electricians, hot works activities include soldering and brazing connections, using heat guns for cable forming or heat shrink application, cutting cable tray or trunking with angle grinders, and using blow torches for lead sheathing or plumbing connections.

A hot works permit system requires the electrician to obtain written authorisation before starting work, clear all combustible materials within at least 3 metres of the work area, have a suitable fire extinguisher immediately available, use fire-retardant blankets or screens to contain sparks, and maintain a fire watch for at least 60 minutes after work is completed. The fire watch period is essential because smouldering materials may not produce visible flames until well after the hot works activity has finished.

Electrical installation work also creates fire risks through incorrect cable sizing (leading to overheating), loose connections (creating high-resistance hot spots), and incorrect protective device selection (allowing sustained overcurrent). The cable sizing process specified in BS 7671 Appendix 4 is a fire prevention measure — every correction factor and derating calculation exists to prevent cables from exceeding their safe operating temperature.

In the event of a fire, the priority is always life safety. Electricians must be familiar with the evacuation procedures for every site they work on — this information should be communicated during the site induction and displayed on fire action notices throughout the building.

On discovering a fire: raise the alarm immediately by activating the nearest manual call point or shouting "fire." Call 999 (or instruct someone to do so). If the fire is small and you have the correct extinguisher, you may attempt to extinguish it — but only if you can do so safely and without blocking your escape route. If in any doubt, leave the building immediately by the nearest available exit route.

During evacuation: do not use lifts, close doors behind you to slow fire spread, assist anyone who needs help (but do not put yourself at risk), go directly to the designated assembly point, and report to the fire warden for roll call. Do not re-enter the building until the fire service has confirmed it is safe to do so. On construction sites, the assembly point and roll call procedure should be clearly defined in the construction phase plan.

Fire wardens (also called fire marshals) are designated personnel responsible for sweeping their area during an evacuation, directing occupants to exits, checking that all rooms and areas are clear, and reporting the status of their area to the chief fire warden or fire service incident commander. Electricians may be asked to take on fire warden duties, particularly on smaller sites.