Flashcards in Chapter 2: Safety Deck (49)
What is the difference between an electric shock and electrocution?
The length of exposure
National Electrical Code. A legal code published by the NFPA (National Fire Protection Agency).
Authority Having Jurisdiction- An organization, office or individual responsible for enforcing requirements of a code or standard, or for approving equipment, materials, an installation or procedure.
The Occupational Safety and Health Administration. Enforces code compliance & safety.
Ground Fault Circuit Interrupter: trips the circuit when it detects over-current or a ground fault. It does this by measuring the voltage and current in the hot and neutral wires. Installed anywhere there is water or moisture (kitchen, bathroom, etc.).
An unwanted path to earth.
Minimizes shock if you accidentally touch a live wire: the majority of the charge will go through the wire rather than your body, since positively charged electrons will always take the path of least resistance.
Lock Out Tag Out (OSHA procedure)
Arc-Fault Circuit Interrupter
Nationally Recognized Testing Laboratory is an independent laboratory recognized by OSHA to test products to the specifications of applicable product safety standards
National Fire Protection Association- publishes the NEC.
National Institute for Occupational Safety and Health
Class A fire
Common combustibles that burn to (A)sh - wood, paper, etc.
Class B fire
Flammable liquids - stored in a (B)arrel
Class C fire
(C)ircuit- energized electrical equipment
Class D fire
Why do we handle wires with one hand when possible?
To prevent completing the circuit- the charge will go to the ground, decreasing risk of defibrillation.
What mainly determines the severity of a shock?
The amount of current.
What conditions affect the severity of a shock?
Body size, type of food you ate, humidity, clothing.
A burn caused by contact with an electrical source, which allows an electrical current to pass through the body. The body heats up, causing internal burns.
When electricity short-circuits through the air or across inadequate insulation
The explosion caused by an arc flash
What is the first rule of safety?
Personal protective equipment
How do you safely use a straight ladder?
The distance from the base to the structure should be 1/4 of the height where the ladder touches the structure. If the top of the ladder is taller than the structure, there should be at least 3 feet/rungs extending beyond the point where the ladder touches the structure.
Scaffolds higher than --- must have a guardrail.
Effects of 1 mA
Felt slightly as a tingle.
Effect of 1 mA to 10 mA
Muscles contract and prevent victim from releasing charged object.
Effect of 10 mA to 100 mA
Fatal after several seconds.