Show FIRE pre prevention TIPS causes of electrical fires continued from last week by J R nelson tort fort lewis college electric motors the electric motor presents a possible fire hazard in short cir buiting cui ting producing arcs and sparks or in overheating due to overload and possible burnout burn out the starting equipment of motors may pro pre 1 u na ard through the arcing or of current curlent breaking contacts guard against these hazards with proper protection and by keeping combustible materials away this condition has pro 5 caused more motor fl fires other cause protection should be so designed as to protect multiphase motors against single phasing for instance if one fuse blows on a three phase motor it will continue to run on single phase and if it runs this way for any length of time the motor is liable to burn out and a possible fire result to avoid both casualty and fire hazards have your electrician ground your motors improper or faulty grounding presents a false sense of security maintenance too is important extinguishing fires in electrical Electr cal equipment in fighting electrical fires one ne must consider possible damay 61 equipment and injury to th thet aerator it is always best to turn off the current and if the fire continues use extinguishers most suitable for the conditions for small fires a carbon tetrachloride tetra chloride carbon dioxide or dry chemicals are best suited and cause causa the least damage to equipment and can be used without danger if the current is not cut off as the extinguishing materi materials alF are non conductors of electricity it is unwise to use calcium chloride foam or soda acid extinguishers on electrical equipment fires as the liquids leave salts in the windings and laminations of motors if you should need to use such extinguishers on electrical equipment fires be sure the current is cut ff before any attempt is made to extinguish the fires next week we will discuss static electricity |