By maintaining a safe working practice you will protect not only your own safety but that of others who will come into contact with your work. Always ensure grounding straps and leads are intact and securely connected. Always use the correct fire extinguisher. Water can conduct electric currents, Carbon dioxide (CO2) and appropriate Halogenated extinguishers should be used and in some cases foam is appropriate. Always ensure interlock switches are operating properly Always ensure your tools and test equipment are kept clean, in good working order and always use the appropriate tool for the job. Always discharge capacitors in a circuit. Some capacitors such as those in a power supply will hold a lethal charge long after the power has been removed. Always familiarise yourself with the safety precautions associated with any solvents or chemicals you are about to use. Many give off strong fumes which can ignite or cause drowsiness. Always use appropriate tools, equipment and protective clothes, Buy the best you can afford. Always use the recommended replacement component, many devices have built in safety measures and narrow tolerance bands. Always wear protective equipment, protective boots, hard-hats, goggles, overalls etc when they are needed. Always remove all rings, bracelets, medallions or anything which could get caught in moving machinery or may conduct electricity. Always read the manufacturers data and information sheets. They are an invaluable source of information and safety procedures for the equipment under test. Always when working with electricity, keep your left hand in your pocket where possible to avoid providing an electrical path through your chest and heart. Do not work when you are tired or taking medicine which makes you drowsy or affects your reactions and concentration. Do not work under poor lighting conditions Do not work in areas which are damp Never use an extension or adapter to overcome grounding straps or earth leads. Never work in wet clothing Never assume a circuit is off. Always check for power with the appropriate instrument. Never meddle with safety devices Never override interlock safety switches. Never remove equipment grounding straps or leads.