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Electrical Safety

Electrical Safety. Responsibilities Hazard Control Electrical Equipment Personal Protective Equipment. Responsibilities. Management Training Safety Corrective action Meets code and regulations Employees Report deficiencies immediately

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Electrical Safety

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  1. Electrical Safety Responsibilities Hazard Control Electrical Equipment Personal Protective Equipment

  2. Responsibilities • Management • Training • Safety • Corrective action • Meets code and regulations • Employees • Report deficiencies immediately • Only perform work on equipment authorized / trained for • Properly inspect all electrical equipment prior to use

  3. Hazard Control • Engineering Controls • Electrical panels, breakers, disconnects, etc… are enclosed • When required - water tight enclosures are in use • Electrical distribution areas are properly grounded • Clear approach of 36”side and front is maintained • Conduit is fully supported • All non-rigid cords have strain relief where necessary • Administrative Controls • Only trained & authorized employees conduct electrical repairs • Barriers & warning signs - prevent unauthorized entry • Lockout / tagout • Electrical control devices properly labeled

  4. Electrical Equipment • Examination - free from recognized hazards • suitability of equipment for an identified purpose • mechanical strength and durability • electrical insulation • heating effects under conditions of use • arcing effects • classification by type, size, voltage,current capacity & use • safeguarding of employees using or coming into contact with equipment • Identification of Disconnecting Means & Circuits • shall be legibly marked to indicate its purpose • at the point where the circuit originates • each service, feeder, and branch circuit

  5. Personal Protective Equipment • Shall be used when contact with exposed electrical sources are likely • Shall be designed for the job and environment • Shall be inspected or tested before use • Non-conductive head PPE required where overhead or energized parts exist. • Eye / face PPE required when electrical arcs, flashes or flying objects exist. • Shall maintain insulating capabilities at all times. • Electrically rated safety shoes / boots / gloves / head gear • Tools properly insulated • Electrically rated matting for all distribution panels / utility rooms

  6. PPE Continued • Fuse handling equipment insulated for the circuit voltage • Ropes and other hand lines • Portable ladders shall have non-conductive side rails • Working on elevated platform - REQUIRES - safety watch on the ground • Personnel working in elevated platforms must wear safety harness and lanyard • Lockout tagout • Locks attached to prevent operating the disconnecting source • Tag contain a statement prohibiting unauthorized operation • Warning signs and barricades and or a safety attendant

  7. Standard Operating Procedures Electrical Pre-work Procedures • Treat all electrical circuits as “Live” • Obtain permission from supervisor • Lockout / tagout at electrical power sources • Verify de-energized conditions exist - operate controls • Voltmeter verification at live electrical source - must be rated for voltage • Check exposed circuits phase to ground • No voltage in exposed circuits - it’s ok to work • If voltage is detected - Stop - determine source & eliminate voltage • Conduct work • Close up exposed circuits, boxes, control panels and equipment • Remove lock and tag • Obtain supervisor permission to energize circuits

  8. Standard Operating ProceduresWorking on Exposed Energized Circuits • Obtain permission from manager • Lock out and tag out all circuits possible • Treat all circuits as energized • Remove all conductive clothing and jewelry • Use all required PPE - including shields & barriers • Inspect all overhead lines before starting • Provide adequate lighting • Don’t reach were you cant see • Approach distance see chart next slide.

  9. APPROACH DISTANCE FOR QUALIFIED EMPLOYEES ALTERNATING CURRENT Voltage range (phase to phase)Minimum approach distance 300V and less……………………………. Avoid Contact Over 300V, not over 750V……………. 1 ft. 0 in. ( 30.5 cm) Over 750V, not over 2kV……………… 1 ft. 6 in. ( 46 cm) Over 2kV, not over 15kV……………. 2 ft. 0 in. ( 61 cm) Over 15kV, not over 37kV……………. 3 ft. 0 in. ( 91 cm) Over 37kV, not over 87.5 kV…………. 3 ft. 6 in. (107 cm) Over 87.5kV, not over 121kV………… 4 ft. 0 in. (122 cm) Over 121kv, not over 140kV…………… 4 ft. 6 in. (137 cm) • Employees entering a confined space with exposed energized parts, must use protective barriers, shields, or insulated materials rated at or above the present voltage. • Secure all doors to prevent contact with employee and causing employee contact with energized parts

  10. Re-energizing Electrical Circuits After Work is Completed • Qualified person shall • conduct test and visual inspection • verify all tools / equipment have been removed • Warn all employees that the system is going to be re-energized • Remove all locks and tags (by the individual that installed them) • Conduct a visual determine that all employees are clear and energize the system

  11. Powered Equipment Safety Rules • PEE = Cord or plug-type electrical devices including extension cords • damage free - no stapling, nailing or door jams • visually inspected - if damage is present repair immediately • do not over load circuits • ground type plugs - to - ground type receptacles • never alter plugs • if moisture is present - equipment must be double insulated or rated for the job • it’s not a good idea to be standing in water while operating PPE • locking-type connectors shall be properly secured when connected to a

  12. Electrical Circuits Safety Procedures • Electrical power and light circuits are devices designed to connect or reverse circuits under a power load condition • cable connectors, (not load-breakers) fuses, terminal plugs or cable splice connectors may not be used, unless an emergency, to connect, disconnect or reverse in place of proper electrical circuits • once a protective circuit is disconnected or opened, it may not be connected or closed until it is determined safe to energize • over current protectors or circuits or connected circuits are never modified • only qualified employees may perform electrical circuit or equipment tests • all test equipment must be inspected before use - if damaged remove from service • test equipment must meet or exceed the voltage being tested & environment • electrical equipment is may not be used around flammable material unless the proper measures have been taken to prevent the hazardous condition from developing

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