BASIC ELECTRONICS - OD1633 - LESSON 1/TASK 1
must be clearly warned not to touch the suspected equipment until it has
been deenergized. Aid should be enlisted to unplug the device as soon as
The injured person should be pulled free of contact with
stationary equipment (such as a bus bar) if the equipment cannot be quickly
deenergized, or if considerations of military operation or unit survival
prevent immediate shutdown of the circuits.
This can be done quickly and safely by carefully applying the following
First, protect yourself with dry insulating material. Then use a dry board,
belt, clothing, or other available nonconductive material to free the victim
DO NOT TOUCH THE VICTIM UNTIL THE SOURCE OF
from electrical contact.
Once the victim has been removed from the electrical source, it should be
determined if the person is breathing. If the person is not breathing, a
method of artificial respiration is used. Sometimes victims of electrical
shock suffer cardiac arrest (heart stoppage) as well as loss of breathing.
Artificial respiration alone is not enough in cases where the heart has
stopped. A technique known as cardio-pulmonary resuscitation (CPR) has been
developed to provide aid to a person who has stopped breathing and suffered
a cardiac arrest. CPR is relatively easy to learn and is taught in courses
available from the American Red Cross and most post installations, as well
as from other civilian and military sources.
Voltage, Current, and Resistance
Every electrical circuit includes voltage, current, and resistance. Even a
simple circuit consisting of a battery, wires, and a lamp has voltage,
current, and resistance.
The battery supplies the voltage which forces
current through the wires and the lamp. The wires and lamp offer a certain
amount of resistance to the current. The way in which current, voltage, and
resistance affect each other is expressed in Ohm's law. Ohm's law uses "I"
to represent current, "E" to represent voltage, and "R" to represent
In the paragraphs that follow, we will define the voltage, resistance, and