Electrical Safety

1
Electrical Safety
2
Overview

• Responsibilities
• Hazard Control
• Electrical Equipment
• Personal Protective Equipment

3
Responsibilities

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

4
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 36side and front is maintained
• Conduit is fully supported
• All non-rigid cords have strain relief where
  necessary
• Administrative Controls
• Only trained authorised employees conduct
  electrical repairs
• Barriers warning signs - prevent unauthorized
  entry
• Lockout / tagout
• Electrical control devices properly labeled

5
Electrical Equipment

• Examination - free from recognised 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

6
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

7
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

8
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 - its 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

9
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
• Dont reach were you cant see
• Approach distance see chart next slide.

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
• its 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