SAFETYSAFETY

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 ●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 ARC ●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 Ventricular Fibrillation ● 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

●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. Safe Work Habits

Protection Ground ●Physical connection to earth ●Provides a safe path for electrical discharge

Protection ●Circuit Breakers ● Ground Fault Circuit Interrupter A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. 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.

●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: ●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 (ABC) Universal (ABC) is the most common Class D 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 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

SAFETYSAFETY