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F. Temporary wiring should have overcurrent protection i.e.,circuit breakers D. Metal hybrids react with water to form hydrogen gas which will ignite with or fuses. any ignition source. Some hydrides will ignite in contact with water i.e., G. Chooses wiring of suitable gauge and insulation type for the location it is lithium hydride,and sodium hydride. to be used. E. Anhydrides—These are compounds of acid from which the water has 7. Extension Cords. been removed. They react violently with water and organic acid A. Inspect extension cords frequently for: anhydrides and are combustible. They often have low flash points such (1). Kinked or crushed cable. that the heat if reaction with water may cause ignition. (2). Strand of wire penetrating insulation. F. Peroxides—Extremely dangerous solutions containing peroxides will (3). Broken,weak,or missing prongs,including the ground. form crystals in cold water or as decomposition products.These crystals B. If the prongs are corroded,they should be cleaned with emery cloth. can be ignited by sudden shock or even by turning the cap. C. Select the proper gauge wire and insulation type for the application. (1). Bottles which show signs of crystal development should be handled D. If your are running wire a long distance,the resistance will be greater, by explosive experts only. requiring a higher rated wire. (2). Either forms peroxide crystal rapidly at room temperature. Ether E. Extension cords are not to be used as permanent wiring. should not be store for more than 6 months. (3). Purchase products which contain peroxides in small quantities so Fire Protection and Prevention they will be used up before crystals have time to form. Request products with the most recent date of manufacture. 1. Housekeeping. The keeping of good housekeeping,by its'nature,reduces 4. Smoke Detectors. Smoke detectors should be placed in all places of the risk of fire. Below is a list to help you in your housekeeping. employment. The office,laboratory,workshop and warehouse need to be A. Remove trash in a timely manner and store in metal trash cans. protected by smoke detectors. B. Remove excessive dust from structures,walls,ceilings,and under A. Smoke detectors should be: workbenches. This is best done with a vacuum cleaner. (1). Of a type approved by a nationally organized testing laboratory. C. Hoods,chimneys,and exhaust vents should be inspected and cleaned in (2). Placed on the ceiling of the work area. a regular basis in accordance with their use. (3). Tested monthly according to the manufacture's instructions. D. Flammable liquids should be stored separately and in proper containers (4). Kept clean,including the use of a vacuum to remove dust and dirt. with spring loaded tops and vents. (5). Replace batteries once a year or more frequently if required. E. Dirty rags should be stored in metal containers with a self-closing lid and (6). Replace bulbs as needed. an air space beneath. B. Smoke detectors should not be placed directly above equipment or F. Keep area organized with enough space for work and storage. operations which will activate the alarm unnecessarily or drastically G. Keep walkways and doorways clear and open. shorten their useful life span. Examples include: H. Do not use stairways for storage. (1). Welding and cutting operations. 2. Electrical Overload. (2). Bunsen burners or flame atomic absorption units. A. Overloaded circuits heat up because the path of travel of the electrical (3). Acid baths or sinks where corrosive fumes or moisture may corrode current has too great a resistance. The heat generated at the point of the detector. resistance may ignite nearby combustible items. (4). Saws or bench grinders which may produce dust and grit whish may B. Do not use extension cords as permanent wiring and ensure that the clog the detector. cord is rate 5. Fire Extinguishers. for the intended purpose. A. Extinguishers are the first line of defense against fires,and one should be 3. Chemical Reaction. located in any area where a fire could start. Examples are: A. Fire and explosion can occur when chemicals are handled or handled or (1). Office stored improperly. (2). Laboratory B. Acids and bases should be stored separately. (3). Shop C. Chemicals should be stored and used away from any source of heat or (4). Warehouse open flame. (5). Vehicle (6). Boat