introduction to electricity
DESCRIPTION
Introduction to Electricity. By: Mr. Brock. Terms. Electricity- Source of energy that can be easily converted into light, heat or power Ampere (Amp)- Unit of measure of the rate of flow of electricity through a wire Volt- unit of measure of electrical pressure. Electricity. Terms. - PowerPoint PPT PresentationTRANSCRIPT
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By: Mr. Brock
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Electricity- Source of energy that can be easily converted into light, heat or power
Ampere (Amp)- Unit of measure of the rate of flow of electricity through a wire
Volt- unit of measure of electrical pressure
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National Electrical Code- handbook that sets the minimum standards for electrical wiring (Revised every 3 years)
Underwriters Laboratory (UL)- a laboratory that tests electrical wiring materials. A UL stamp ensures the product meets the minimum safety standards.
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Circuit- complete path through which electricity flows; from power source to lamp and back to source
Fuse- safety device which burns through when current becomes too great
Circuit Breaker- safety device that trips rather than burning
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Conductors- wires through which electricity flows
Service Entrance Panel (SEP)- panel located inside the house from which every circuit branches
Ground Fault Circuit Interrupter- protects form shock, can be installed at SEP or on receptacle
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Branch Circuit- circuit between last breaker and one or more outlets
Feeder Circuit- circuit between the SEP and the fuse or circuit breaker protecting a branch circuit
Conduit- thin walled steel pipe used to protect electrical wires
Short Circuit- improper connection between the hot and neutral wires or between hot wires
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The trip level of a GFCI is between 4 and 6 milliamps (thousandths of a amp)
GFCI disconnects in as little as 1/40th of a second
GFCI disconnects circuits in situations where a breaker or fuse would not
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1) Within 6 feet of a sink 2) In garages except where not accessible 3) Unfinished basements 4) Crawl Spaces 5) Boathouses 6) Bathrooms
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1) Single Pole- used for 120 circuits2) Double Pole- used for 240 circuits
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Most kitchen appliances Ex: toaster, blender, garbage disposer,
dish washer, freezer, refrigerator Clothes Washer Portable Heater Hair Dryer Electric Drills Lamps Electric Razor
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Air conditioner Large Water Heater
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Watts= Volts x Amps Volts= Watts AmpsAmps= Watts Volts
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100 watts and 120 volts, How many Amps? 0.83 120 volts and 2 amps, How many Watts? 240 1 amp and 115 watts, How many Volts? 115