1. Electrical Circuits

2. Electrical Circuits
Electrical circuits will always have a minimum of 3 parts
Voltage Source - A device that provides the electrical flow
Conductor – an object that will allow electricity to flow through it
A device to do work- Load
Example-Light, Drill, Circular saw

3. Types of Closed Circuits
Series Circuit - a circuit that has only one loop for electrons (current) to follow in
Used in simple devices such as flashlights and some Christmas lights.

4. Types of Closed Circuits (cont)
Parallel Circuits - contains 2 or more branches for electrons (current) to flow through
Houses make use of parallel circuits

5. Safety Devices
There are two types of safety devices most commonly used when using electrical wiring in buildings and cars
These devices keep the wires from getting hot and melting or possibly starting a fire

6. Safety Devices (cont)
Fuse - a fuse is a small device that breaks when the electricity becomes more than the wires may be able to handle
When the fuse breaks it opens the electrical circuit so no more electricity can flow through
Most commonly used in cars or individual electric devices

7. Examples of Fuses

8. Safety Devices (cont)
Circuit breaker - when electric flow becomes too large a piece of metal bends and flips a switch that opens the circuit.
The advantage to having a circuit breaker is that it can be reset (just reset the switch and it bends the metal back into place)
A circuit breaker is generally used in houses and large buildings

9. Examples of Circuit Breakers