Electrical Safety Responsibilities Hazard Control Electrical Equipment Personal

Electrical Safety Responsibilities Hazard Control Electrical Equipment Personal Protective Equipment 10/3/2020 1

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 10/3/2020 2

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 – – 10/3/2020 Only trained & authorized employees conduct electrical repairs Barriers & warning signs - prevent unauthorized entry Lockout / tagout Electrical control devices properly labeled 3

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 10/3/2020 4

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 10/3/2020 5

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 10/3/2020 6

Standard Operating Procedures Electrical Pre-work Procedures • Treat all electrical circuits as “Live” a b c d e f g h i j k 10/3/2020 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 7

Standard Operating Procedures Working 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. 10/3/2020 8

APPROACH DISTANCE FOR QUALIFIED EMPLOYEES ALTERNATING CURRENT Voltage range (phase to phase) 300 V and less………………. Over 300 V, not over 750 V……………. Over 750 V, not over 2 k. V……………… Over 2 k. V, not over 15 k. V……………. Over 15 k. V, not over 37 k. V……………. Over 37 k. V, not over 87. 5 k. V…………. Over 87. 5 k. V, not over 121 k. V………… Over 121 kv, not over 140 k. V…………… Minimum approach distance Avoid Contact 1 ft. 0 in. ( 30. 5 cm) 1 ft. 6 in. ( 46 cm) 2 ft. 0 in. ( 61 cm) 3 ft. 0 in. ( 91 cm) 3 ft. 6 in. (107 cm) 4 ft. 0 in. (122 cm) 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 10/3/2020 9

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 10/3/2020 10

Powered Equipment Safety Rules • PEE = Cord or plug-type electrical devices including extension cords – – – – 10/3/2020 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 11

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 10/3/2020 12