Transcript Slide 1

SAFETY
Overview
● Introduction to Safety
● Potential Electronic Mishaps
● Safe Work Practices
Definition of Safety
●
The condition of being free from (or causing)
hurt, injury, or loss.
OSHA
● 1970 Occupational Safety and Health Act
● Prior to 1970, employers weren’t required to provide personal
protective equipment (PPE) to employees. Over time, various
laws were enacted to protect the rights of employees injured on
the job, but they were hard to regulate and enforce. This was a
dangerous time for employees that worked in hazardous
environments!
OSHA
http://www.osha.gov
● 1970 Occupational Safety and Health Act
● In 1970, all workplace safety laws were combined into one law,
called the Occupational Safety and Health Act, or OSHA.
Thanks to OSHA, people rarely have to work in an unsafe
environment without personal protective equipment and
procedures in place.
MSDS
● Required by OSHA in
work areas
● Includes a list of all
potential hazardous
materials and safety
practices
MISHAPS
Electrical Shock
High Voltage = 600
Volts
Large Current = > 1
Amp
MISHAPS
Safe Distance
● High Voltage Electricity
can ARC across gases
(like air) continuously
● Current will continue to
increase in an
uncontrolled arc until
equipment is destroyed
MISHAPS
Electrocution
●
Death can occur from
any electrical shock
that carries enough
Heart and brain are most susceptible to damage
MISHAPS
Electrical Shock
●
Current passing across the
chest as low as 0.05 amps
induces Ventricular
Fibrillation
●
Current can interfere with
nervous system - control
of heart and lungs
Warning!
The next slide
is graphic.
MISHAPS
Electrical Burns
Electricity + Body = Heat
MISHAPS
Electrical fires are caused by:
● Decayed wiring/ bad
grounds
● Poor maintenance
practices
● Power surges
MISHAPS
Misuse of Tools and Equipment
● Improper tool settings
● Lack of PPE
● Wrong tool for the job
Safe Work Habits
● No watches / rings / jewelry
● Unplug your equipment before servicing!
● Work Area = clean and dry
● Proper grounding / Insulation
Safe Work Habits
● One-hand rule
● Always keep one hand in your pocket when troubleshooting to
prevent a current path across the heart .
● Safety observer present
● In the event of an emergency, another person's presence may
save your life!
● Follow step-by-step procedures
● Following proper procedures could prevent serious damage to
you and your equipment.
Protection
Ground
● Physical connection to
earth
● Provides a safe path
for electrical discharge
Protection
● Circuit Breakers
●
A circuit breaker is an automatically
operated electrical switch designed to
protect an electrical circuit from damage
caused by overload or short circuit.
Ground Fault
Circuit Interrupter
GFCI monitors the amount of current
flowing from hot to neutral. If there is
any imbalance, it trips the circuit. It is
able to sense a mismatch as small as 4
or 5 milliamps, and it can react as
quickly as one-thirtieth of a second.
Protection
● Lockout / Tagout
● Lockout/tagout procedures are
safety protocols that protect
workers from accidents; regulated
by OSHA
● Involves physically locking and
labeling power sources to avoid
accidental activation while
maintenance is being performed
Protection
● Fuses: First line of defense
● When a device receives too much current, the wire
filament inside the fuse will burn or break; this stops
current from flowing.
● The device is now protected from excess current
preventing further damage.
Protection
Fire Extinguishers
Fire Extinguisher Classes
Universal (ABC) is the most common
Class D is for metals
Shock!
● DO NOT TOUCH!
● REMOVE from source of electricity
● If not breathing, begin CPR
● If breathing, place in recovery position and treat
for traumatic SHOCK
● STAY until help arrives
Summary
Remember, good safety habits play an important
role in everything you do. Engineers can design
and build safety devices into a piece of equipment;
unfortunately they cannot design and build safety
into you.
Safety is your job.
YOU must be responsible for your own safety.
When working around electricity and electronic
devices, ensure your own safety by :
•Recognizing and avoiding potential dangers
•Paying attention to all warnings and cautions
•Following good personal and laboratory safety
habits
SAFETY