Residential Construction Academy: House Wiring (MindTap Course List)
4th Edition
ISBN: 9781285852225
Author: Gregory W Fletcher
Publisher: Cengage Learning
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Question
Chapter 7, Problem 10RQ
To determine
The table in the NEC® used to select the minimum size grounding electrode conductor.
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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 7 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_forwardDirections: 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_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
- When wiring a split-wired receptacle, it is recommended that the part of the duplex receptacle controlled by a switch be the _______half and the part that is hot at all times is the ______ half. (Objective 18-3)arrow_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_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
- 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_forwardName the standard sizes of circuit breakers up to and including 100 amperes. This information is found in NEC NEC Section____________.(Objective 6-2)arrow_forward
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