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- Highly skilled labour is required in O TRS wiring O casing - caping wiring O Conduit wiring O Both conduit and casing-caping wiring Which type of wiring gives more mechanical and fire protection? O casing capping wiring batten wiring conduit wiring O cleat wiringWhen installing grounding electrode conductor at services, it's common to use a single large common grounding electrode conductor and connect multiple grounding electrode conductor to it A. clamps B.jumper C. taps D.screwsMost residential general lighting circuits are wired with 14-AWG copper conductors and are protected by 15-amp circuit breakers. However, there are many electricians who install 12-AWG copper conductors and protect them with 20-amp circuit breakers. How will you know which conductor size and which circuit breaker size will be used for the general lighting branch circuits in the house you are wiring?
- why is it important that the "hot" conductors in a 3-wire branch circuit be properly connected to opposite phases in a panelboard?Six 1/0 aluminum conductors are to be run in a conduit. Each conductor has type THWN insulation's, and the ambient air temperature is 30 degrees celcius. What is the ampacity of each conductor?4. In conceal knob and tubing wiring, the clearance to be maintain between conductors is a. 45 mm b. 76 mm c. 55 mm d. d. 50 mm
- 3. The zero sequence current is times the current in neutral wire.Which type of wiring gives more mechanical and fire protection? O batten wiring O casing capping wiring O cleat wiring O conduit wiringWhy is it important that the hot conductor in a 3-wire branch circuit be properly connected to opposite phases in a panelboard? __________________
- h.1. In an alternating-current system, the maximum size for a copper grounding electrode conductor isA. 250 kcmil.B. 3/0.C. 500 kcmil.D. 4/0. h.2. The figure shows a fault condition in an ungrounded electrical system. Which of the following will occurbecause of the fault in this system?A. Only the overcurrent protector at Point A will trip open.B. The ground fault will heavily damage the service.C. Nothing will happen until a second ground fault occurs.D. The overcurrent protection will trip, shutting off all the line side power.Grounding lighting fixtures. Threre are specific requirements for grounding lighting fixtures. How must they be grounded and with what size conductors?Low-voltage conductors. a. are not powerful enough to cause death from electrocution b. must exceed 480V to cause death C. are responsible for most electrocution deaths due to the frequency of contact d. are unlikely to cause injury if rubber-soled shoes are worn