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safe 211 test 2 electrical/fall protection

safe 211 test 2 electrical/fall protection
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OSHA 29 CFR 1910.147
rules regarding lock out tag out
60% of death due to lock out tag out ...
no lock out tag out was attempted
the company has responsbility to
train
provide equipment
procedure
ECP
energy
control
procedure
de-energize
free from any source of energy which could cause the movement of equipment. Also free from any eletrical connection to a voltage source or static charge which could cause movement through being turned on or off
energized
connected to energy source which could cause equipment or material movement
stored energy
any form of energy which is contained in a unit and can result in the unexpected and uncontrolled movement of the item
energy control procedure
a procedure that is developed documented and utilized for each unique service/ maintainence job to insure the control of potentially hazardous energy
energy isolating device
a mechanical device that prevents the release of energy. ex circut breaker, disconnect switch, line blind chains etc
energy source
any eletrical, mechanical, hydraulic, pneumatic, chemical, thermal, gravity or other source that can cause movement of a piece of equipment
1910.147a2ii
lockout tagout production exemption
levels of training for lock out and tag out
authorized
affected
awareness
authorized levels of training (lock out tagout) definition
worker chosen to lock and work on equipment
Affected levels of training (lock out tagout) definition
job requires them to use equipment that is being worked on
awareness levels of training (lock out tagout) definition
all ohter employees near the area
multi energy source must have what
written procedure
SES
single energy source
purposes of an outlet tester
test GFCI
confirms power
confirms proper wiring
most dangerous type of wiring
hot ground reverse
energy source ...
pneumatic chemical hydrualic electrical etc
energized
connected to energy source
residual energy
any type of energy stored in the device
sections of an energy control program
written energy procedures
employee training
periodic inspections
sections of an energy control procedure
state intended use
list specific steps
specific steps on placement / removal / transfer
specific steps for verification
lockout sequence
prep for shutdown
macine or equipment shutdown
machine isolation device ( ball vavle cover)
apply lockout device
stored energy
verification of isolation
lockout materials must be
durable
substantial
standardized
identifiable
outside contractors must do what regarding a lock out tag out program
has to follow host employer program
tag only systems requirements
if a device is not capable of being locked out

employer shows full employee protection
highest fatality rate of electrical fatalities
overhead line work
conductor (defintion)
a material that has free electrons. Electric current can readily move from one atom to another.
Insulator (defintion)
a material that does not have free electrons. Electric current that does not have free electrons. Non-Metalic material
electric current (defintion)
the flow of electrons through a conductor
what determines severity of a shock
amount of current during the amount of time in contact with the electricty
the service panel is not designed for what
to save worker lives
80% of electrical injuries occur from what
arch flash and ignition of flammable clothing
arch tempratures can reach what
35000F
voltage (E volts)
pushes current through the system
current (I amps)
the work of the system
Resistance (R ohms)
the opposition to current flow within the system
power (W watts)
Amount of energy delivered
OHM'S law
E = I x R
Power formula
W = E x I
1 Milliamp
faint tingle
10 Milliamps
Cant let go painful shock
100 Milliamps
Almost certian death
36% of electrical shock injuries result in what
falls from ladders
50% of overhead powerlines hazards result in what
direct worker contact
80% lineman fatailties result in what
lineman holding with bare hands
number one way to prevent fatalities by overhead lines
maintain safe working distances
minimum distance approach distance for overhead lines
10ft
10 ft minimum working distance for what voltage
50k
GFCI does not need to work to have.... work
ground prong
70E is based on the following protective stratgies
creating an electrically safe work condition
training workers
planning the task
selecting and using PPE
A .... must be in tact for a GFCI to test properely
ground wire
shock hazard analysis (definition)
shall determine the voltage to which personnel will be exposed, boundary requirements, and the personal protective equipment necessary in order to minimized the possibility of electric shock to personal
limited approach (defintion)
qualified person shall advise the non qualified person of the electtrical hazard and warn him/her to stay out
electric shock vs arch flash (electric shock)
the human body becomes part of the electric circuit which may or may not cause injury or death
electric shock vs arch flash (arch flash)
an explosive release of energy caused by an electric arc
the human body does not have to be part of the circuit to be injured or killed
guard live parts of electric equipment operating at .... volts or more against accidental contact
50 volts
the PPE required for working on or near live electrical components depends on what factors
voltage
current
distance
exposure time - most important
transient energy (defintion)
is a short lived burst of energy in an eletrical system caused by a sudden change. May be internal or external event
overvoltage (defintion)
when the voltage in a circuit or part of a circuit is rasied above its upper designed limit
40 cal is resistant to how many volts
600v
way most workers died of eletrcial shock over ten years ago
bare hands to wire
enegized electrical work permit is required to be completed by who
supervisor and employee signature
OHSA's focus four in construction
electrical
falls
struck by
caught between
eletrical hazards
inadequate wiring
wires with bad insulation
ungrounded electrical systems and tools
overloaded circuits
damaged power tools and equipment
using the wrong PPE and tools
overhead powerlines
all hazards are made worse in wet conditions
electrical protective measures
guard live parts
proper use of flexible cords
use fuses and circuit breakers
proper grounding
use GFCI's
lockout/tagout
closed electric panels
training
residental construction effective date
2010
2011
when subpart M apply
leading edges
open holes
floor and wall openings
water
ramps
hoist areas
roofs and riggs
confined spaces
formwork / rebar
what is the new defintion of residential construction
wood frame residental use
fall protection
harness and lanyard
anchor point
retractable
safety net
position device
fall prevention
controlled access zone
guardrail
hole covers
fall restraint
warning line
safety monitor
details of a guardrail
42 inches
200lbs force
toe board
horizontal lifeline must hold
500lbs
an anchor point must hold
5000lbs
A ground fault is:
energized frames resulting from electrical conductivity between energized conductors and equipment frames
4. A ground fault circuit interrupter protects against the following
whose body is also in contact with the ground
The neutral wire carries current under normal conditions true or false
true
The ground wire carries current under normal conditions true or false
false
A ground fault can be detected by
measuring the voltage between the equipment frame and the ground bus at the service entrance
A break in the ground wire
results in ground fault protection becoming nonfunctional
A ground-fault circuit interrupter (GFCI) is a device which opens the circuit when
a person's body conducts current between the hot wire in the circuit and ground
Before attempting to extinguish an electrical fire, it is best to
Cut the power
Electric arc welding in the rain is okay if
Never, unless you have a death wish
Which two parameters are most important for fuses?
ampere and current-interruption rating
GFCI stands for
Ground Fault Circuit Interrupter
Which of the following must be notified prior to equipment shutdown for repair?
affected employees
What must be done before restoring energy to equipment after removing a lockout/tagout
The Authorized Employee will make a visual inspection of the work area to ensure that all nonessential items have been removed, all components are operationally intact, and all affected personnel are informed
What is the only purpose of a Lockout/Tagout?
To protect employees from hazardous energy including electrical, mechanical, hydraulic, pneumatic, chemical, thermal, or any other types of energy
Who is an Authorized Employee
An employee, who has been trained, examined and is knowledgeable of the company's lockout/tagout procedure and hazardous energy control and has been designated as such
Who can remove a Lockout/Tagout
Only the employee who hung it and his or her Supervisor if the employee can not be contacted
Lockout/tagout is a safety procedure mandated by
OSHA
The first step in lockout/tag out is to
Turn off the equipment and disconnect the energy source
Falls are dangerous because of three primary elements
Free-fall distance the worker falls
Shock absorption at impact
Weight of the worker
things needed for preventing a fall in a hole
cover
secured (500lb)
marked
lanyards can not be wrapped around and tied back into themselves or put in knots unless
backbiter style is approved
harness need to be inspected every
10 yrs
lanyards need to be inspected every
5 yrs
vertical distance from working level horizontal plane of net when placed at 5 ft (net overhang)
minimum required horizontal distance of outer edge of net from the edge of the working surface 8 ft
vertical distance from working level horizontal plane of net when placed at 5 - 10 ft (net overhang)
minimum required horizontal distance of outer edge of net from the edge of the working surface 10 ft
vertical distance from working level horizontal plane of net when placed at above 10 ft (net overhang)
minimum required horizontal distance of outer edge of net from the edge of the working surface 13 ft
characteristics of a controlled access zone
contorl lines 6 to 25 ft from the edge
6 to 60 ft for pre cast concrete
200lbs minimum breaking strength
flagged every six feet
workers in CAZ must be trained to recognize hazards
a safety monitor most also be used