NC2 WRITTEN EXAM (SET B)

• Schematic Diagram


  A kind of diagram that is used in designing or troubleshooting electrical installation control equipment to facilitate the tracing of the circuit
• Electrical parameters applied or labeled to all kinds of switches

  • Rated current
  • Rated Voltage
• Fittings


  • Locknut
  • Bushing
  • Connector
• RSC/IMC

  The commonly used type of conduit in service entrance
• Conduit body


  A fitting resembling a pipe with a removable cover to access electric conduit
• Outlet box


  A box used for flush type convenience outlet and switches
• Mechanical connector


  Crimp onto a conductor for both splice and termination
• PVC Solvent


  Commonly used adhesive material for joining PVC conduit
• 40A motor full load current


  Circuit breaker size to be used is equal to 100A
• De-energise a duplex wire quickly and safelyby cutting


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• Ammeter connection


  Connected in series with the load
• Ohmmeter connection


  Connected across the terminal with the load
• Grounding electrode conductor


  Connection between the grounded circuit conductor and the equipment grounding conductor at the service
• THW wire


  PVC insulated heat resistant wire used mostly in industrial wiring
• Wireways


  Sheet metal troughs with hinged or removable covers for housing and protecting electrical wires and cables
• Straight connector


  Type of fitting used for tightening between the boxes and the RSC conduit
• Utility box


  Used for typical switches
• Enclosure


  Provides appropriate degree of protection of equipment against external influences and with live parts in any direction
• Torque wrench is necessary to tighten bolted joints of copper bus bars inside bus ducts and bus ways to ensure the bolts are well tightened
• Conduit strap/clamp


  Type of fitting used for exposed conduit support
• Raceways exposed to widely different temperatures should be sealed
• Selection requirements for circuit breakers

  • Kilo amps
  • Interrupting capacity/ampere trip
  • Ampere frame
• Flexible braided copper plate


  Material used for long length bus bar joints to give allowance to thermal expansion
• CCTV


  24-hour protection for homes and commercial buildings to monitor video anytime anywhere
• Camera


  Auxiliary device of CCTV that monitors motion daily
• Recorder


  Part of auxiliary device that captures live events and saves as video files
• Motion detector


  Parts of auxiliary system that set the motion trigger action individually for each camera
• Sleeve


  Accessory which serves to complete a conduit system, such as bushing and access fittings
• Convenience outlet


  A point in the wiring system which current is taken to supply utilization equipment
• To make a 30 degree bend, you will use a mechanical rather than an electrical function (elbow)
• TW wire


  Technical term for a type of wire used in building wiring
• Wiring Diagram


  A diagram that shows the location and actual termination of the auxiliary devices
• Acronyms


  • FACP - Fire Alarm Control Panel
  • FDAS - Fire Detection and Alarm System
• Input devices of FDAS

  • Smoke detector
  • Heat detector
  • Manual call point
• CCTV


  Closed Circuit Television
• CCTV components


  • Camera (input device)
  • Monitor (output device)
• A CIRCUIT BREAKER USED TO PRTECT ELECTRICAL EQUIPMENT FROM THE CURRENT SURGES AND OVERLOADS
• 25A


  The ampacity of 8.0mm`2 THW wire
• if a 5.5 mm2 TW wire inside a conduit pipe is connected with eighty percent loading, what is the allowable maximum

  oading that it can sustain?

  30A