All

• Electrical wiring plan

  • Technical representation
• Schematic diagram

  • Representation of the elements using abstract graphic symbols rather than realistic
• Wiring diagram

  • Single visual representation
• Pictorial diagram

  • Is a picture or a sketch
• Wiring devices

  • Single discrete
• Path devices

  • Serve as path of electrical current (conductor)
• Control devices

  • Can regulate the flow
• Fault devices

  • Immediately detect any fault
• Protective devices

  • Which are the weakest link
• NEMA

  • National Electrical Manufacturers Association
• OHSA(1974)

  • To protect every workingman against danger : some unsafe electrical equipment and installations can be identified by faulty insulation,
• OHS

  • Preventing work-related injuries, illnesses and fatalities by working with employers and workers.
• OHS(1989 act section 6(2)d

  • to provide systems of work that are planned, organized, performed and maintained so as to be, so far as is reasonably practicable, safe and without risk to health"