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Electrical Safety
Study Guide
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•1
Introduction
•What percentage of
American workforce is
injured by electrocution each
year?
Note: Based on Bureau of Labor and Statistics
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•2
Electrical Safety
•What is the most widely used
form of energy in most
facilities?
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•3
Introduction
•What are the Michigan rules
regarding electricity?
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•4
Voltages
•What is the most common
voltage used in the hospital
setting?
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•5
Electrical Hazards
•What does 29 CFR
1910.303(b)(1) state?
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•6
Electrocution
•A current between _____ and
______ miliamperes can
cause ventricular fibrillation
in the heart.
•What is a miliampere?
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•7
Ventricular
Fibrillation
•Ventricular fibrillation can
happen due to a small
current passing through the
body in what ways?
•A.
•B.
•C.
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•8
Electrocution
•How many mAs may it take to
cause ventricular fibrillation?
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•9
Voltage
 Define voltage:
 What is voltage measured
in?
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•10
Voltage
•What term is used for the
stated voltage for a given
line? (Example: a 115 volt
circuit may actually be 120
volts but is called 115 volts
nominal)?
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•11
Current
•Define current.
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•12
Current
•What are two different types
of current?
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•13
Current
•What is the amount of
electricity that flows in a
circuit?
•What is current measured in?
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•14
AC and DC
•What does_____mean?
• AC
• DC
•What does most existing
equipment run on?
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•15
Resistance
 What opposes the flow of
current measured in Ohms
(R).

 What two ways is this
caused?
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•16
Ground
 What is the process of
achieving earth neutral?
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•17
Ground
•What is the symbol for
ground?
•Where might it found?
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•18
GFCI
•What prevents electrocution
by detecting a ground fault
and opening the circuit up?
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•19
Overcurrent
•What is the extra amount of
current that passes through a
circuit and an protection
device that usually opens the
circuit called.
•What are these devices?
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•20
Overcurrent
Protection
•How does a fuse or breaker
work?
•What are two examples of
things that have fuses or
breakers?
•A.
•B.
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•21
Short Circuit
•What happens when there is
a direct contact between
“hot” and “neutral”?
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•22
Static Electricity
•What is the buildup of the
difference of potential
between materials?
•Static electricity is ____ in
voltage but ___ in amperage
(in most cases).
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•23
Extension Cords
• In what situations does
1910.305(g)(1)(iii) not allow
flexible cords to be used?
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•24
Temporary wiring:
•What amount of time does
1910 305(a)(2) require that
temporary wiring be used
for?
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•25
Grounded
Equipment
•What are two guidelines to
follow when plugging a piece
of equipment in?
•A.
•B.
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•26