ToolsArmenia Knowledge Base Power Tool Safety Rules: Before, During and After Work Most power tool accidents are caused not by a faulty tool but by ignoring simple rules. This guide brings together the rules that apply to almost every handheld and portable power tool. Reading time: about 8 min Updated: October 2026 ToolsArmenia Editorial Team Contents Why safety rules matterCore rulesRisks by tool typeCommon mistakesFinal checklistFAQ Why safety rules matterA power tool combines three risks: electric current, fast-moving parts (disc, blade, drill bit) and the dust, chips or sparks created during work. Safety rules are designed to reduce all three at once.The rules apply equally to wall chasers, routers and multi-tools, and a construction vacuum should be used to remove dust.The rules are general, but the manufacturer's manual always takes priority for a specific tool. If the manual differs from general advice, follow the manual. More articles on this topic are in Safe Use of Tools.ImportantRead the safety section of the manual before work, even if you have used a similar tool before. Guards and approved accessories can differ between models. Core rules1. Prepare the work areaKeep the work area clean, well lit and dry. Remove flammable liquids, gases and dust that sparks could ignite. Keep children and bystanders away.2. Check the electrical connectionPlug the tool only into a sound socket with the voltage shown on the rating plate. Check the cord and plug for cracks, exposed wires or burn marks. Use a residual current device (RCD) outdoors and in damp areas.3. Wear personal protective equipmentSafety glasses are required for almost any job. Noisy tools call for hearing protection, dusty work for a respirator, and cutting or grinding tools for gloves and closed clothing.4. Secure the workpieceClamp the workpiece firmly or hold it in a vice. Never hold small parts by hand while cutting, sanding or drilling.5. Keep a stable stance and stay focusedStand firmly and use both hands on tools that have an auxiliary handle. Do not work when tired or under the influence of alcohol or medication.6. Change accessories only with the tool disconnectedUnplug the tool or remove the battery before changing a disc, blade or bit. Use only accessories whose size and rated speed match the tool.WarningNever remove or block the guard, never tape the switch in the on position, and never use the tool for a job it was not designed for. Risks by tool typeBesides the general rules, each tool type has its own main hazard. Here is a short comparison.Tool typeMain riskRequired protectionCheck before workAngle grinderDisc breakage, sparks, kickbackGlasses or face shield, gloves, ear protectionDisc condition, rated speed, guard positionCircular saw, jigsawKickback, cutsGlasses, ear protectionBlade sharpness, guard operationDrill, rotary hammerTool twisting when the bit jams, dustGlasses, gloves, respirator (concrete)Auxiliary handle, hidden cables in the wallSandersDust, vibrationRespirator, glassesDust extraction, vacuum connection Common mistakesWorking without safety glasses "just for a minute".Using a tool with a damaged cord or a kinked extension lead.Changing accessories while the tool is plugged in.Holding the workpiece by hand instead of clamping it.Fitting a larger disc or one with a lower rated speed.Walking away before the tool has fully stopped.Good practiceAfter work, switch the tool off, wait until it stops completely, clean off the dust and store it in a dry place out of children's reach. Final checklistI have read the safety section of the manualThe work area is clean, well lit and dryCord, plug and extension lead are undamagedI am wearing safety glasses and the required PPEThe workpiece is clampedThe accessory matches the tool and is fitted securelyThe guard is in place and works Frequently asked questionsDo I need safety glasses for a short job?Yes. A chip or a fragment of a disc can fly off in the very first second, so glasses are worn for work of any length.Can I use any extension cord?No. The cable cross-section must suit the tool power and the cord length, and a reel must be fully unwound during work so it does not overheat.Why hold the tool with both hands?Using both hands keeps the tool under control if the accessory jams or kicks back. That is what auxiliary handles are for.When should I use an RCD?When working outdoors, in damp areas or on a building site. A residual current device cuts the power if current leaks and reduces the risk of electric shock.What if the tool gets hot or makes an unusual noise?Switch it off at once and check the accessory and ventilation slots. If the problem remains, take it to a service centre and do not continue working. 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