Residential Construction Academy: House Wiring (MindTap Course List)
4th Edition
ISBN: 9781285852225
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Chapter 11, Problem 14RQ
To determine
The lengths of R cable rolls in plastic wrapping and on reels.
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For the frame (ABCD), draw forces diagram (axial, shear and bending moment).
50 kN/m
3.0 m
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3.0 m
- 2.0 m-
Page 1 1 1
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5. A uniform circular shaft, 750 mm long, carries 2 pulleys. The pulley on the left is 250 mm from the left end and
weights 2000 N. The pulley on the right is 500 mm from the left end and weighs 1274 N. The right pulley experiences
a pull of 14,142 N vertically downwards. The shaft transmits a torque of 3 kN-m between the pulleys. Assume Km and
Ks equal to 1.5 and allowable shear stress of 70 MPa. Determine (a) the maximum bending moment in N-m and (b)
the required diameter of the shaft in mm.
Chapter 11 Solutions
Residential Construction Academy: House Wiring (MindTap Course List)
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- Name the ampacity for the following copper conductors according to Table 310.15(B) (16): (Objective 6-4) a. 10 AWG THW amps _____ amps b. 8 AWG THWN amps_______ amps c. 1 AWG THHN amps ______ amps d. 4/0 TW amps ______ ampsarrow_forwardThe most often used category-rated UTP cable for voice and data wiring from various outlets back to the service center or other distribution device in a residential application is______. (Objective 16-3)arrow_forwardA wall-mounted luminaire (fixture) weighing not more than_________ pounds is permitted to be supported on a device box provided the luminaire or its supporting yoke is secured to the box with no fewer than two 6-32 or Larger screws. Name the NEC section that covers this requirement. (Objective 9-5)arrow_forward
- Small-appliance branch circuits and laundry branch circuits installed in a dwelling must have a rating of at least__________ amperes. This information is found in NEC Section __________. (Objective 6-2)arrow_forwardName and describe three cable types that can be used in residential electrical installations. (Objective 2-5)arrow_forwardThe minimum amount of free conductor required at an electrical box used in residential wiring for termination purposes is______________ inches. As long as the box has no dimension Larger than 8 Inches (200 mm), there must be at Least ______ inches of free conductor extending out from the box opening. Name the NEC section that covers this wiring practice. (Objective 9-3)arrow_forward
- If Type SER service entrance cable is used by an electrician to feed a subpanel from a main panel, the cable must be secured within _________of the panel enclosures and at Intervals not exceeding___________. Name the NEC section that states this requirement. (Objective 8-7)arrow_forwardIn a work situation where an electricians hands get wet while operating a 120-volt, corded drill, which of the following would be true? (Objective 1-1) a. Body resistance increases, and any shock would be mild. b. Body resistance remains the same, and there is no danger as Long as rubber boots are worn. c. Body resistance is substantially decreased, and severe shock could occur. d. There is no danger as Long as a three-prong plug is used.arrow_forwardList the minimum trade size of Type EMT for each of the following applications. Assume the use of conductors with THHN insulation. (Objective 12-1) a. Six 14 AWG _______ b. Six 12 AWG ______ c. Three 10 AWG ______ d. Four 8 AWG _____arrow_forward
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