Post on 02-Jan-2016
transcript
Safety and Hazard Prevention
• Current is the killing factor in electrical shock
• Human bodies has resistance
• If voltage is applied, current will flow through the human body
• If one tenth of the current required to operate a 10 watt light bulb passed through your chest, the result could be lethal
Safety and Hazard Prevention
• A current of 2 to 3 mA.
Will cause a tingling sensation
(The m stands for milli, A is for amps)
Milli is 1/1,000 of an amp
Safety and Hazard Prevention
• The tingling sensation increases and becomes very painful at about 20mA
• Currents between 20 and 30 mA will cause muscle contraction
• At 20 and 30 mA you may be unable to let go of the wire
Safety and Hazard Prevention
• Currents between 30 and 60 mA
• Will cause muscle paralysis and difficulty breathing
• Currents at 100 and 200 mA will generally cause death
Safety and Hazard Prevention
Lockout – Tag Out Procedures
• One of the best ways to prevent electrical shock
• Equipment being worked on, should be disconnected from the power source and locked
Safety and Hazard Prevention
• The person working on the equipment should carry the only key
• This will prevent accidental activation of the equipment
Safety and Hazard Prevention
The Power Supply Should Be Tagged With
• Name of the person working on the equipment
• What service is being preformed
• Reason for service
• Date and Time
Safety and Hazard Prevention
Safety• Do not work alone
• Learn first aid
• Do not wear jewelry
• Be careful using screwdrivers on electrical panels
Safety and Hazard Prevention
Portable Electric Tools
• Electric tools with metal frames should have a grounding cord
• The grounding wire will protect the operator from electrical shock
Safety and Hazard Prevention
Portable Electric Tools
• The grounding wire will carry current to ground
• This will let the breaker or fuse trip the circuit
• The grounding adaptor must be connected to a good ground