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## HRAD 3473 WEEK 8 NOTES

by: Nichole Pike

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Nichole Pike
OK State
GPA 3.776

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These notes cover week 8 of class and wraps of material for the second exam.
COURSE
Mechanical Equipment and Facility Management
PROF.
Ryan
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
HRAD, 3473, mechanical, equipment, and, facility, Management
KARMA
25 ?

## Popular in Hotel and Restaurant Administration

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

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