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- Four electricians are discussing wiring under raised floors in information technology equipment rooms. Electrician A says that wiring under the raised floor requires fire-resistant walls, floors, and ceilings between other occupancies. Electrician B says that wiring under the raised floor requires fire resistant halfway up the walls and floors between other occupancies. Electrician C says that the room must employ a disconnecting means that removes half of the power to all equipment in the room. Electrician D says that a disconnecting means isn't necessary for the room. Which of the following statements is correct? A. Electrician B is correct. B. Electrician D is correct. C. Electrician A is correct. D. Electrician C is correct.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.18. What should be done with light sources that are connected at each end of a cable while it's being repaired?A. They should be turned off and disconnected.B. They should be turned off only.C. Nothing, they can be left alone.D. They should be disconnected only.
- 5 a) Discuss Electricity power generation and distribution to residential properties. b) with diagrams explain how a Distribution Board is wired to provide electricity to a residential property. c) Explain the following materials and Accessories. i. Male and female bushings. ii male and female adaptors iii. Couplings. iv. Wire/cable sizes and their usWhat are the shunts and multiplier? Derive the expression for both, with reference to meters used in electrical circuits. Need a detailed and well-explained answer. thank youCalculate the following. a) Expected voltage at “A” with switch SW1 open. b) Expected voltage at “A” with switch SW1 closed.
- 1- For the Automatic Nighttime Thermostat circuit, describe how the sub-circuits should be connected and what is their function respectively.[Fill-in-the-blank] in dwelling units shall supply only loads within that dwelling unit or no loads associated only with that dwelling unit. Select one: a. None of these b. Ground-fault protection c. Service-entrance conductors d. Branch circuitsA computer's power supply converts mains AC to low-voltage regulated DC power for the internal components of a computer. You are building a new computer. You are deciding which type of power supply to install. Which of the following definitions BEST describes a valid type of power supply? Correct Answer: A single-rail power supply provides one rail (PCB trace). This provides the best safety for the computer by providing a single point of shutdown in the event of a short circuit. Correct Answer: A single-rail power supply provides one rail (PCB trace) used to always provide equal wattage to all devices attached to the power supply. Correct Answer: A dual-rail power supply provides separate rails (PCB traces) used to provide equal wattage to the devices attached to each rail. Correct Answer: A dual-rail power supply provides separate rails (PCB traces) used to balance the power load between multiple circuits, which prevents any one circuit from becoming overloaded.