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A basic electrical circuit is made up of one continuous electrically conductive loop. As an example, see the wiring
diagram of a typical fl ashlight to the right.
Electricity fl ows from positive (+) to negative (-). The
switch stops the electricity from fl owing.
When the switch is closed, electricity will fl ow in a
continuous loop and make the bulb light up. The
electricity will fl ow from the positive side of the battery
past the closed switch through the light bulb (providing
the electricity to light the bulb) and return to the negative
side of the battery.
When the switch is open, the electricity cannot pass
through and electrical fl ow is stopped.
There are many types of switches and components
available within an electrical circuit. Examples include:
motors, contactors, relays, interlocks, capacitors and
limit switches of various types. For commercial operators
to function, each component must be working correctly
for the electrical fl ow to pass through and form a
continuous electrical circuit or loop.
Light Bulb
Battery
Switch
D
Basic Electrical Information
Basic Electrical Circuit
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