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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.Grounding Lighting Fixtures. There are specific requirements for grounding lighting fixtures. How must they be grounded and with what size conductors? Be sure and cite the code in your answers.
- 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 you
- Calculate the following. a) Expected voltage at “A” with switch SW1 open. b) Expected voltage at “A” with switch SW1 closed.2. Explain the following sensors with neat diagram. (construction, operation and applications) a) Load cell b) Turbine meterwrite down the slection of wiring accessories used in electrical installation
- 7- What is the uses of circuit breaker?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 circuits