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Company Name __________________________ Job Name __________________________ Date________
GENERAL
SAFETY -
UNDERSTANDING
ELECTRICITY AND BREAKER PANELS
The process of forcing electrons to move
through a material creates electricity. A standard generator performs this
process. The best material for carrying electricity is a "conductor."
Most metals are excellent conductors and the most common material used for
electrical wiring is copper. In order to provide protection from direct contact
with the conductor, an "insulator" is used as a cover around the
conductor. Electrons will not move easily through insulators such as most
plastics and rubber. Insulators and proper grounding help to prevent electrical
shocks.
Typically, electricity is provided to your
building or facility by way of underground or overhead power lines originating
from a nearby electrical power plant. The power lines feed into your electrical
breaker panel(s). Each breaker in a panel represents a circuit supplying
electricity to a designated area of your building. The majority of your
electrical safety considerations begin at the breaker panel. Here are some basic
safety considerations for all panels:
* The breaker panel should be readily and
easily accessible at all times. Do not store any items on the floor area
directly in front of the panel. Maintain an aisle in front of the panel that is
at least three feet wide.
* The panel should have a closed cover. The
cover should not be locked unless work is in progress requiring that the cover
be locked as part of the lock out procedure.
* The panel should have a directory index
identifying each individual circuit breaker. It is usually found secured to the
inside face of the cover. The directory should identify the various receptacles,
general area, or equipment serviced by each circuit breaker.
* There should not be any missing breakers or
other openings in the breaker face plate that would allow you to contact the
"hot" electrical bus at the back of the panel. Openings could also
allow dust or dirt to accumulate inside the panel box interior. This dust may
damage the breakers to the point where they will not "trip" when
needed.
* Breakers should never be taped or otherwise
secured in the "closed" (on) position. Each circuit breaker and
circuit are rated for a maximum amount of amperes. An ampere is the unit for
measuring the rate of flow of electricity through the circuit. If the rate of
flow in the circuit exceeds the designated maximum for the breaker, the breaker
"trips" and stops the flow of electricity. If the breaker is not
allowed to trip, insulators could melt from excessive conductor heat caused by
electricity flowing too fast! Fires or increased exposure to shock may also
occur.
* Lastly, breakers should not be taped in the
"open" position as a means of de-energizing the circuit during repair
or maintenance activity. Open breakers should be properly tagged or locked out.
Safety Recommendations:__________________________________________________________________________________
Job Specific Topics:_______________________________________________________________________________________
M.S.D.S Reviewed:_______________________________________________________________________________________
Attended By:
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