Transcript Study Guide
Electrical Safety Study Guide Ferris State University & Michigan Department of Career Development •1 Introduction •What percentage of American workforce is injured by electrocution each year? Note: Based on Bureau of Labor and Statistics Ferris State University & Michigan Department of Career Development •2 Electrical Safety •What is the most widely used form of energy in most facilities? Ferris State University & Michigan Department of Career Development •3 Introduction •What are the Michigan rules regarding electricity? Ferris State University & Michigan Department of Career Development •4 Voltages •What is the most common voltage used in the hospital setting? Ferris State University & Michigan Department of Career Development •5 Electrical Hazards •What does 29 CFR 1910.303(b)(1) state? Ferris State University & Michigan Department of Career Development •6 Electrocution •A current between _____ and ______ miliamperes can cause ventricular fibrillation in the heart. •What is a miliampere? Ferris State University & Michigan Department of Career Development •7 Ventricular Fibrillation •Ventricular fibrillation can happen due to a small current passing through the body in what ways? •A. •B. •C. Ferris State University & Michigan Department of Career Development •8 Electrocution •How many mAs may it take to cause ventricular fibrillation? Ferris State University & Michigan Department of Career Development •9 Voltage Define voltage: What is voltage measured in? Ferris State University & Michigan Department of Career Development •10 Voltage •What term is used for the stated voltage for a given line? (Example: a 115 volt circuit may actually be 120 volts but is called 115 volts nominal)? Ferris State University & Michigan Department of Career Development •11 Current •Define current. Ferris State University & Michigan Department of Career Development •12 Current •What are two different types of current? Ferris State University & Michigan Department of Career Development •13 Current •What is the amount of electricity that flows in a circuit? •What is current measured in? Ferris State University & Michigan Department of Career Development •14 AC and DC •What does_____mean? • AC • DC •What does most existing equipment run on? Ferris State University & Michigan Department of Career Development •15 Resistance What opposes the flow of current measured in Ohms (R). What two ways is this caused? Ferris State University & Michigan Department of Career Development •16 Ground What is the process of achieving earth neutral? Ferris State University & Michigan Department of Career Development •17 Ground •What is the symbol for ground? •Where might it found? Ferris State University & Michigan Department of Career Development •18 GFCI •What prevents electrocution by detecting a ground fault and opening the circuit up? Ferris State University & Michigan Department of Career Development •19 Overcurrent •What is the extra amount of current that passes through a circuit and an protection device that usually opens the circuit called. •What are these devices? Ferris State University & Michigan Department of Career Development •20 Overcurrent Protection •How does a fuse or breaker work? •What are two examples of things that have fuses or breakers? •A. •B. Ferris State University & Michigan Department of Career Development •21 Short Circuit •What happens when there is a direct contact between “hot” and “neutral”? Ferris State University & Michigan Department of Career Development •22 Static Electricity •What is the buildup of the difference of potential between materials? •Static electricity is ____ in voltage but ___ in amperage (in most cases). Ferris State University & Michigan Department of Career Development •23 Extension Cords • In what situations does 1910.305(g)(1)(iii) not allow flexible cords to be used? Ferris State University & Michigan Department of Career Development •24 Temporary wiring: •What amount of time does 1910 305(a)(2) require that temporary wiring be used for? Ferris State University & Michigan Department of Career Development •25 Grounded Equipment •What are two guidelines to follow when plugging a piece of equipment in? •A. •B. Ferris State University & Michigan Department of Career Development •26