Residential Construction Academy: House Wiring (MindTap Course List)
5th Edition
ISBN: 9781337402415
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Question
Chapter 1, Problem 15RQ
To determine
Whether the statement “The NEC gives minimum safety standards for electrical work and is not a how to manual” is true or false.
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Q2. Find IED
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R = 20
T- 20 -fi40–e-20 -
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1. A 150 X 90 X 12 mm angular
section is welded to a gusset
plate shown.
Area of angular section is 2376
sq.mm.
Fu = 550 MPa
Allowable shear Fv=0.30FU
Fy = 250 MPa
Allowable tensile stress Ft =
0.60FY
a. Determine the force P
b. Determine the total length of
weld using 12mm fillet weld
c. Determine the value of a
d. Determine the value of b
Chapter 1 Solutions
Residential Construction Academy: House Wiring (MindTap Course List)
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- Directions: Circle T to indicate true statements or F to indicate false statements. The higher the resistance in an electrical circuit, the lower the amount of current that can flow in the circuit. (Objective 1-2)arrow_forwardList five guidelines for the care and safe use of electrical hand tools. (Objective 3-4)arrow_forwardIf 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_forward
- A 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_forwardDescribe the purpose of an LB conduit body used in a residential service entrance Installation that uses electrical conduit. (Objective 8-1)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_forward
- The 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_forwardName 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_forward
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