Electricity & Electronic Systems SAFETY. When are Safety Glasses required? All students and visitors MUST wear safety glasses at any time there is any

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

Students must supply their own glasses

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

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

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

Basic Electrical Theory

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

Define Electricity

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

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.

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)

Power Source

Alternator provides power for running vehicle

(Alternator provides power for running vehicle)

Load


Light bulb, motor, solenoid, etc.

Control Device


Switch, Relay, Computer

Wiring or Conductors


Insulated and Ground

Circuit Protection


Fuse or Circuit Breaker




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


The light gets hot and gives off light

Electrical work can be magnetism

Magnetism pulls in the solenoid and makes the starter turn

Start on Lab #2

Power Source



Load

Circuit Protection (fuse)

Diagrams show the Power Source at the top, ground at the bottom

Diagrams show the Power Source at the Left, ground on the Right

Wiring Diagrams

• 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

What can cause an electrical circuit to fail?

• A bad or defective: Power Source



Load

Circuit Protection (fuse or circuit breaker)

Documents

Electricity & Electronic Systems SAFETY. When are Safety Glasses required? All students and visitors MUST wear safety glasses at any time there is any