Figure 5-34.Sources of heat for soldering splices.
An electrician must know and be able to apply the
principles of electricity safely. If you disregard your own
safety, you also disregard the safety of your fellow
workers. Remember that the time to prevent an accident
is before it happens. Respect for electricity comes from
understanding electricity. Whenever in doubt, always ask
your supervisor. Report any unsafe condition, unsafe
equipment, or unsafe workpractices to your supervisor as
soon as possible.
Before removing any fuse from a circuit, be sure the
switch for that circuit is open or disconnected. When
removing fuses, use an approved type of fuse puller and
break contact on the hot side of the circuit first. When
replacing fuses, install the fuse first into the load side of
the fuse clip, then into the line side.
Electrical shock occurs when a person comes in
contact with two conductors of a circuit or when his or her
body becomes part of the electrical circuit. In either case,
a severe shock can cause the heart and lungs to stop
functioning. Also, because of the heat produced by
current flow, severe bums may occur where the current
enters and exits the body.
Prevention is the best medicine for electrical shock.
Respect all voltages and follow safe work procedures. Do
not take chances. CEs, with the exception of very few
personnel with special training, are not qualified to work
on live circuits.
PORTABLE ELECTRIC TOOLS
When using portable electric tools, always make sure
they are in a safe operating condition. Make sure there is a
third wire on the plug for grounding in case of shorts.
Theoretically, if electric power tools are grounded and if
art insulation breakdown occurs, the fault current should
flow through the third wire to ground instead of through
the operators body to ground. Always use a ground-fault
circuit-interrupter (GFCI) with portable electric tools.
New power tools are double insulated eliminating the
need for a ground prong; but for safety reasons, they still
should be used with a GFCI.