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Essential Electricity Concepts for Mechanics: Volts, Amps, Watts

Learn key electrical terms like volts, amps, and watts. Understand formulas and terminology crucial for mechanics. Identify cables, wires, and devices used in electrical work. Practice calculating watts for common shop tools. Master electrical basics to enhance your skills.

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Essential Electricity Concepts for Mechanics: Volts, Amps, Watts

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  1. Enterprise: Ag. MechanicsJob: Becoming Familiar with Electricity

  2. Electrical Terminology • 1. Volts - measure of electrical pressure • 2. Amperes - measure of electrical volume • 3. Watts - measure of electrical useage • 4. Formula: Watts = Amps x Volts • 5. Kilowatt Hour - unit by which electricity is sold

  3. Electrical Terminology G S • 6. Switch - device used to control the flow of electricity.

  4. Electrical Terminology S G • 7. Three-way Switch - used to control the flow of electricity from two different locations.

  5. Electrical Terminology D G • 8. Duplex Receptacle - electrical outlet or plug-in.

  6. Electrical Terminology SOURCE J • 9. Junction - electrical box where the source connects to the cable 10. Wire Nut - device used to connect two or more wires =

  7. Electrical Terminology • 10. Cable - two or more insulated conductors (wires) encased in an outer covering. • a. sizes (big to small) - 2, 4, 6, 8, 10, 12, 14, or 16 gauge • b. colors - black, white, bare/green, red

  8. Electrical Terminology • 11. Black Wire - common, power, hot • solid line • 12. White Wire - neutral • dashed line • 13. Ground Wire - safety (green or bare) • dot dash line • 14. Red Wire - power, hot • waved line

  9. Electrical Terminology • 15. Examples of Cables: • a. 12/2 = 12 gauge wires, 1 black, 1 white, and 1 bare ground (3 wires total) • b. 14/3 = 14 gauge wires - 1 black, 1 white, 1 red, and 1 bare ground (4 total)

  10. Electrical Terminology 16. Other a. a light fixture 17. Locate the amps and volts on the following shop tools or machines, then calculate watts: a. Drill Press d. Air Compressor b. 8” Bench Grinder e. Miter Saw c. Arc Welder f. Other? L

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