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MAGM 225 Residential and Farmstead Electrical Wiring and Principles

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... Flow is measured in Amps. Electrical Terms and Concepts ... Unit - Ampere. Symbol - A or I. Conductor. Matter that easily allows the free flow of electrons. ... – PowerPoint PPT presentation

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Title: MAGM 225 Residential and Farmstead Electrical Wiring and Principles


1
MAGM 225 Residential and Farmstead Electrical
Wiring and Principles
  • Mr. Conrado

2
Introduction
  • What is electricity?
  • Webster- A source of energy from particles of
    matter.
  • Better understood as the flow of electrons.

3
Matter and electron flow
  • Matter - Anything that takes up space
  • Matter consists of extremely tiny particles
    grouped together to form atoms.

4
The atom and their charges
  • Parts of the atom
  • Proton - Positive
  • Neutron - Neutral
  • Electron - Negative
  • There are always the same number of protons and
    neutrons.
  • Atoms want the same number of electrons in orbit
    as the number of protons and electrons in the
    nucleus.

5
The Basic Structure of an Atom
Elements with less than 4 Electrons in their
outer rings make good conductors
Because the Electrons are easily dislodged from
their orbit and pushed to the atom next to them.
(Electron flow)
6
The Basic Structure of an Atom
Elements with More than 4 Electrons in their
outer rings make good insulators
Because the Electrons remain in the outer rings
when electromotive force ( Voltage) is present.
7
How dose electricity flow? What causes electrons
to move from atom to atom?
Positive Charged Atom
Negative Charged Atom
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Too Many Electrons
Too Few Electrons
8
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
Voltage is the abundance of electrons on one side
of a conductor as compared to the other side.
This could also be described as the potential for
electron flow or potential difference.
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9
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
Voltage Pushes the electrons
10
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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Voltage Pushes the electrons
11
How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage Pushes the electrons
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How dose electricity flow? What causes electrons
to move from atom to atom?
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Voltage
(Pressure)
(Electromotive Force)
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The flow of the electrons is referred to as
Current
13
How dose electricity flow? What causes electrons
to move from atom to atom?
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Electron Flow is measured in Amps
The flow of the electrons is referred to as
Current
14
Electrical Terms and Concepts
15
Voltage
  • Electrical Pressure, potential, or potential
    difference
  • Unit is Voltage - V
  • Meter symbols
  • VAC - V
  • VDC - V


16
Resistance
  • Opposition to current flow
  • Unit - Ohm
  • Symbol - Omega
  • All components and wires have resistance.
  • Corrosion leads to high resistance.

17
Current
  • Flow of Electricity
  • Unit - Ampere
  • Symbol - A or I

18
Conductor
  • Matter that easily allows the free flow of
    electrons.
  • Have fewer than four electrons in their outer
    orbit.

19
Insulator
  • Matter that does not easily allow the free flow
    of electrons.
  • Have more than four electrons in their outer
    orbit.

20
Circuit
  • A path capable of carrying electrical currents.
  • Types of circuits
  • Series
  • Parallel

21
Homework
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