ToolsArmenia Knowledge Base Essential Fire Safety Rules for Power Tool, Welding and Cutting Work Sparks, hot surfaces and overheated cables are the most common causes of fires in workshops and on building sites. Simple rules greatly reduce this risk. Reading time: about 7 min Updated: October 2026 ToolsArmenia Editorial Team Contents Where fire risk comes fromCore rulesChoosing an extinguisherCommon mistakesFinal checklistFAQ Where fire risk comes fromA fire needs three things: fuel, oxygen and an ignition source. In a workshop the ignition source can be sparks from angle grinders and cutting discs, welding spatter, heaters, heat guns, overheated cables and damaged plugs.Fire safety rules aim to keep combustible materials away from ignition sources and to be ready to put out a fire quickly. More safety articles are in Safe Use of Tools.ImportantSparks can travel several metres and smoulder for a long time in dust or sawdust. Check the area after work. Core rulesClear the work areaBefore spark-producing work, remove sawdust, paper, rags, paints, solvents and fuel. If they cannot be removed, cover them with non-combustible material.Store flammable liquids properlyKeep fuel, paints and solvents in closed, labelled containers in a ventilated place away from heaters and sparks.Watch your electrical equipmentDo not overload sockets and extension cords, fully unwind reels, and do not use damaged cables and plugs. Keep heaters away from combustible materials.Welding and cuttingThe welding and cutting area must be cleared and an extinguisher kept nearby. After work, watch the area for a while to detect hidden smouldering.Batteries and chargingCharge batteries only with the correct charger, on a non-combustible surface and under supervision. Do not use a damaged or swollen battery.WarningNever use water on live electrical equipment. First cut the power if it is safe to do so, and use a suitable extinguisher. Choosing an extinguisherBelow are common extinguisher types and the general logic of their use. The exact fire classes are shown on the extinguisher label.ExtinguisherWhere it is usedAdvantageWhat to checkDry powderWorkshop, building site, vehicleUniversal usePressure gauge, inspection dateCarbon dioxide (CO₂)Electrical equipmentLeaves no residueVoltage limit on the labelWater or foamWood, paper, fabricGood coolingDo not use on live equipmentFire blanketSmall fires, clothingSimple to useKeep it within easy reach Common mistakesDoing spark-producing work near sawdust and rags.Storing fuel next to a heater.Using water on a live electrical device.Leaving straight after work without checking the area.Having no extinguisher or never checking its date.Charging a battery unattended.Good practiceKeep the extinguisher near the exit in a visible, accessible place, and make sure everyone working there knows how to use it. Final checklistThe work area is cleared of combustible materialsFuel and solvents are in closed containersCables and plugs are intact and not overloadedA checked extinguisher is nearbyI know the escape routeI will check the area after work Frequently asked questionsWhich extinguisher should I keep in a workshop?Usually a universal dry powder extinguisher and, for electrical equipment, also a CO₂ one. Check the fire classes on the label.Why can't I use water on an electrical device?Water conducts electricity, which can cause an electric shock. Cut the power first.How long should I watch the area after welding?For some time after work, because sparks can smoulder in hidden places. The time depends on the scope of work and the materials.Can an extension cord cause a fire?Yes, if it is overloaded, wound on a reel or damaged.What if the fire cannot be put out?Leave immediately, close the door if it is safe to do so, and call the emergency services. Read alsohow to choose fire safety equipmenthow to organize a safe workplaceessential power tool safety ruleshow to use an extension cord safely Related categoriesSafety accessoriesSoldering ToolsVoltage stabilizersElectric space heaters and heat blowersCar battery chargers and starter-chargersExtension cords and cable reelsBench grinders and sandersMetal cut-off and band sawsVacuum cleaners Next article: how to use an angle grinder safely
