Safety Notes PDF

Safety Computer Technology TEJ Safety  Safety of students, staff, and everyone must be the single most important consideration when working in an environment where there are potentially hazardous materials or equipment.  It is important that you are aware of all the proce...

Safety Computer Technology TEJ Safety  Safety of students, staff, and everyone must be the single most important consideration when working in an environment where there are potentially hazardous materials or equipment.  It is important that you are aware of all the procedures involved in maintaining a safe learning and working environment. General Safety  Inform teacher or supervisor immediately when you become aware of a safety hazard.  Always notify the teacher or supervisor when you or someone is injured.  Keep your work area clean at all times.  Know the location of safety equipment such as the phone, nearest fire extinguisher and fire exits.  Safety eye protection must be worn at all times when soldering or operating power tools.  Clothing should fit snugly to avoid becoming caught in equipment or being burned by the soldering irons.  Confine long hair when working with machinery, in the computer or when soldering. Computer and Electrical Safety Video (10 Facts About Electrical Safety): http://www.youtube.com/watch?v=UE7R9AF0Wpw (3 min) Computer and Electrical Safety  Use all computer and electrical equipment with care. Electrical devices use potentially lethal voltages.  Avoid working on “live” circuits UNLESS absolutely necessary and under supervision. Always inform others when working on circuits – live or not.  Never bypass an electrical safety device. Check all “dead” circuits with a tester before touching them. Never take a shock on purpose.  Always grasp the plastic insulation around the plugs of cords. Do not pull on the cord.  Do not use any damaged equipment or damaged cords. Warm plugs or outlets may be a sign of damage or unsafe wiring. Always have them checked before using them  Make sure all electrical connections are secure before applying power. Always use properly grounded tools. Always ground yourself when working inside the computer. Computer and Electrical Safety (continued)  Do not operate electrical or computer equipment that has come in contact with fluids or in a wet or damp area.  Always stand on dry non-conductive surfaces when performing electrical work. Risk of shock is greater around wet areas.  Remove all metal jewelry when working on energized circuits, or inside the computer; gold and silver are excellent conductors of electricity.  Make sure extension cords or other cords do not present a tripping hazard.  Always be sure that the power is turned off before you touch a person or electrical equipment that has been involved in an electrical accident. Soldering Safety  Solder may contain lead. Avoid breathing solder fumes while soldering or de-soldering. DO NOT waste or use excessive solder!  There must be only one person at each soldering station.  Clamp work securely while soldering or de-soldering. Use a “helping hand” tool or another clamping device to keep your hands free.  Always be aware of hot soldering irons. Arrange your work area so that equipment is within easy reach and you don’t have to reach over the hot soldering iron.  Make sure place the soldering iron on its appropriate holder when not in use. Be sure to unplug the iron after use.  Always wear safety glasses when you are operating any kind of power tool including soldering irons  AT ALL TIMES, IF IN DOUBT ASK YOUR INSTRUCTOR! USE COMMON SENSE! Safety in the Home Electrical equipment used in homes today is generally safe when installed, maintained and used properly. However, there are hazards created when suitable safety measures are not employed such as improper use or lack of maintenance. Video: http://www.youtube.com/watch?v=QfgR0no9iug (3 min) Safety in the Home Electrical Hazards Never run extension cords or other electrical cords under rugs. Do not disconnect cords from the wall by pulling on the cord. Always pull on the plug. Cover unused electrical outlets. Always turn off the main electrical power switch before replacing blown fuses or when checking or replacing switches or outlets. Safety in the Home (continued)  Replace frayed electrical cords, defective wiring and plugs on all appliances as soon as they are discovered.  Do not overload electrical outlets by using multiple tap-off plugs or devices. Always use protected power bars and never connect them in a chain. Safety in the Home (continued)  Do not overload electrical outlets by using multiple tap-off plugs or devices. Always use protected power bars and never connect them in a chain.  Do not use electric space heaters, radios or unprotected appliances in the bathroom, laundry room or near the kitchen sink.  Keep basement floors dry around washtubs and machines to help prevent falls and reduce hazards of electrical shock. Water is a good conductor of electricity.  There should be an appropriate fire extinguisher within easy reach around work areas. Most accidents occur because safety rules are not properly observed. You must learn to protect yourself and others around you. USE COMMON SENSE! Electricity and the Human Body  There are three factors involved in electrical shock:  Voltage (Volts), Current (Amps), Resistance (Ohms).  Voltage is the force or pressure or push that causes the flow of current in a circuit and is measured in Volts (V).  Any voltage over 30 volts is considered dangerous.  Current is the number of electrons per second flowing in a circuit and is measured in Amperes or Amps (A).  A current over 5 mA (milliamps) is considered dangerous. A current of 50 mA is usually lethal. 1 A = 1000 mA  Resistance is the opposition (much like friction) to the flow of current (electrons) in a circuit. It is measured in Ohms (Ω).  Resistance is usually lower in damp or wet conditions. Lower resistance means more electron flow and therefore higher current! Electric Shock In case of accidental shock, the following steps must be taken:  Turn off the power immediately. If this is not possible, use a dry non-conductive material such as a stick or piece of wood to remove victim from electrical contact.  Do not touch the victim until they have been removed from the circuit or the power has been turned off.  Begin first-aid immediately.  Call for help or tell your supervisor or instructor immediately. Electrical Accident Video: https://bit.ly/303EFvt Electrical Fire Safety  In case of electrical fire, call for attention, get everyone out, and pull the fire alarm.  Stay calm.  Use an appropriate fire extinguisher. NEVER USE WATER TO PUT OUT AN ELECTRICAL FIRE.  Pull pin, Squeeze handle.  Aim low at base of fire.  Stay low to avoid smoke. Types of Fire Extinguishers  Class A – Ordinary combustible materials such as wood, cloth, paper, etc.  Class B – Flammable liquids, gasses, and greases.  Class C – Electrical equipment.  Class ABC – Can be used on all of the above applications How To Use A Fire Extinguisher Video: https://youtu.be/lUojO1HvC8c