list precautions to avoid short circuits when working on an electrical system remove rings, watches...
Post on 19-Dec-2015
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List precautions to avoid short circuits when working on an electrical system
Remove rings, watches and jewelry
Remove battery ground strap if working on or around any live circuit such as the alternator, starter, ignition switch etc.
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List precautions to take before starting an engine inside the shop
Sit in operator seat to maintain control of vehicle
Insure all test leads are clear of fan, belts and exhaust
Insure no other person is working around vehicle
Insure that there is an exhaust hose attachedand ventilation fans are turned on
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List precautions to take when working around a running engine
Avoid working near fan or fan belts
Do not reach over fan or moving pulleys
Properly ventilate exhaust
Insure vehicle can not roll
Pay special attention to test leads
Watch out for hot exhaust manifold
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List precautions to take when working around a running engine Turn OFF engine when connecting or
moving testing leads and equipment
Only run engine during specific testing and turn off when done with test
Control any loose clothing or long hair
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Basic Electrical Theory
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What is Voltage?
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What is an Ampere
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Amperage or Electrical Current
the Intensity of the electron movement between atoms
one amp = 6,280,000,000,000,000,000 electrons per second
Carl Sagan would say that one amp equals over six billion, billion electrons per second
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Amperage
The more electrons moving from atom to atom, the more current or Amperage
How many electrons (amps) move is decided by the pressure (volts) and the resistance to the flow of electrons
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Low Amps
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High Amps
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Amperage
Higher Voltages (pressure) will cause more amps (electrons) to flow
Increasing the resistance to the electron movement will lower Amp flow
Which Way does Current Flow?
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Quick Quiz
What is electricity?
The movement of electrons between atoms
What causes electrons to move between atoms?
Voltage
A bunch of extra electrons (negative ions)
An area that is missing electrons (positive ions)
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Lab #4 Series Circuits