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Electricity & Electronic Systems SAFETY. When are Safety Glasses required?. All students and visitors MUST wear safety glasses at any time there is any active lab activities This includes the classroom and the larger lab area Loaner glasses are available for visitors

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Presentation Transcript

When are safety glasses required l.jpg
When are Safety Glasses required?

All students and visitors MUST wear safety glasses at any time there is any active lab activities

This includes the classroom and the larger lab area

Loaner glasses are available for visitors

Students must supply their own glasses


How do i get safety glasses l.jpg
How do I get Safety Glasses?

Glasses can cost as little as $1.00 a pair

Instructor can sell you glasses

Tool trucks that visit school have very comfortable glasses

Any auto parts store will stock a variety of glasses


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Contact lenses do not belong in the shop

  • Many solvents, chemicals, fuels and particles can be trapped next to, and damage, the eye

  • Damage compounded by wearing contacts.

  • Do not wear contacts in the shop environment


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How do I see without contacts?

  • Wear safety glasses over prescription glasses

  • Obtain side shields to use with prescription glasses (available in Welding dept.)

  • Prescription safety glasses with side shieldsare a good investment



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What can you learn from this lesson?

  • If you understand how an electrical circuit is supposed to work

  • And

  • You can use a Voltmeter

  • You can fix electrical stuff


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Define Electricity

  • The ability to perform “work” by moving electrons between atoms


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What do we need to make an electrical circuit “Work”

  • Break into groups and write a list of the basic requirements to control and use electricity

  • Think of what has to happen to turn on a light.


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What do we need to make an electrical circuit “Work”

  • Power Source

  • Wiring or Conductors

  • (insulated side and ground)

  • Control Device (switch)

  • Load

  • Circuit Protection (fuse)


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Power Source

Alternator provides power for running vehicle

(Alternator provides power for running vehicle)


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Load

Alternator provides power for running vehicle

Light bulb, motor, solenoid, etc.


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Control Device

Alternator provides power for running vehicle

Switch, Relay, Computer


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Wiring or Conductors

Alternator provides power for running vehicle

Insulated and Ground


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Circuit Protection

Alternator provides power for running vehicle

Fuse or Circuit Breaker




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Electrical “work” can be in the form of heat energy

Alternator provides power for running vehicle


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The light gets hot and gives off light

Alternator provides power for running vehicle




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Start on Lab #2

  • Power Source

  • Wiring or Conductors

  • (insulated side and ground)

  • Control Device (switch)

  • Load

  • Circuit Protection (fuse)




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Wiring Diagrams Right

  • Wiring diagrams illustrate how a circuit is supposed to work

  • If you know how it should work, it is easier to figure out why it doesn’t work


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What can cause an electrical circuit to fail? Right

  • A bad or defective:

  • Power Source

  • Wiring or Conductors

  • (insulated side and ground)

  • Control Device (switch)

  • Load

  • Circuit Protection (fuse or circuit breaker)


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