HRAD 3473 WEEK 8 NOTES
HRAD 3473 WEEK 8 NOTES HRAD 3473
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This 2 page Class Notes was uploaded by Nichole Pike on Friday October 7, 2016. The Class Notes belongs to HRAD 3473 at Oklahoma State University taught by Ryan in Fall 2016. Since its upload, it has received 5 views. For similar materials see Mechanical Equipment and Facility Management in Hotel and Restaurant Administration at Oklahoma State University.
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Date Created: 10/07/16
WEEK 8 HRAD 3473 DISCLAIMER: THESE NOTES WERE TAKEN FROM WHAT WAS RETAINED FROM CLASS LECTURE AND TEXTBOOK READINGS. THESE ARE IN NO WAY COMPREHENSIVE, BUT SHOULD BE USED IN CONJUNCTION WITH CLASS MATERIALS PROVIDED BY THE PROFESSOR. CHAPTER 6 ELECTRICITY MASTER SERVICE DEFINITIONsupply of the energy or utility to its primary breakdown point (and can be sub metered) how is it being delivered BIG C’S heat is the byproduct of resistance resistance is the force that is hard to measure we want to form a circuit so that it can be contained, effective, useful and safe the more force we put behind it, the more we can use CURRENT volts and amps are probably the two most important in this equation WIRE TERMS must be the correct size in order to be effective the larger the wire the smaller the number and vice versa OTHER TERMS open circuit is off and closed circuit in on rheostatincrease the amperage would be used for a dimmer for lighting can be used for temperature changes TRANSFORMERS changes the form of electricity transformer can do multiple things at the same time strengthcan decrease or increase volts or amps currentcan change the current the little box that plugs into the outlet is also a transformer INTERNATIONAL IMPLICATIONS transformers (chargers) state the volts that the item can be usedso you know whether you can use it safely internationally TRAINING IN OPERATING AND SAFETY FEATURES lockout/tag out proceduresnext slide communicates at the cutoff that someone is working on the line (all systems, electrical, water, gas, etc.) really important; the person who puts the tag on it should be the one to take it off SAFETY SYSTEM COMPONENTS the overarching principle is to interrupt the supply FUSES first of the 3 types of safety device is a fuse fuse operates on the function of resistance fuses can be seen in cars, Christmas lights, AC compressors, etc. draw means to use electricity CIRCUIT BREAKERS nd circuit breakers are the 2 safety device operates on 2 principles resistance and electromagnetic energy give us the opportunity to reset and keep things safe when a circuit breaker detects there are too many electrons flowing through it (amperage) when it detects too much it goes to the trip position can tell which circuit might have a problem based on which ones are tripped have to move it to the off position before turning it to the on position it could trip because of a ground fault GROUND FAULT INTERRUPTERS 3 category of safety devices operates on the principle of measurement when it detects a large difference it will trip GFI outlets operate in milliseconds and are mainly used in wet areas it measures the flow of electrons between the input side and the output side ground fault measures the flow of electrons GFCI’s required for bathrooms, kitchens, outdoors now in residential codes, there must be a GFCI in bedrooms all 3 types of safety devices measure amperage or the flow of electrons