Solution and AnswerGuide r r r
SIMMONS/ODE, ELECTRICAL WIRING COMMERCIAL, 18E R R © 2024, 9780357767115; R CHAPTER
1:COMMERCIAL BUILDING PLANS AND SPECIFICATIONS
R R R R R
TABLE OF CONTENTS R R
Review ....................................................................................................... 1
Note to instructor: It is recommended that students be required
r r r r r r r r r r to r respond, r where
appropriate, with answers that are complete sentences.
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REVIEW
Refer to the National Electrical Code or the working drawings when necessary.
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rWhere applicable, responses should be written in complete sentences.
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1. What section of a commercialr r r r r building’s r specification r contains r a
list of contractdocuments?
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Answer: A list of the contract documents is contained in General Clauses
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and Conditions. A listing of the Commercial Building contract documents
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is presented in this chapter under the heading “Commercial Building
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Plans.” The instructor may wishto have the students check over this listing
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and compare it with the plans provided.
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2. The requirement for temporary light and power at the job site
r r r r r r r r r r r will
be found in whatportion of a commercial building’s specification?
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Answer: The Supplementary General Conditions specifies the job site
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requirements fortemporary light and power. In some contracts, this
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electrical system becomes the responsibility of the general contractor;
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in other contracts, it is the electrical contractor’s responsibility to
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install and maintain the temporary electrical system. Theinstructor may
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wish to refer the student to NEC Article 590 and discuss the
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requirements in detail.
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,3. The r r electrician r r uses r r the r r Schedule r r of r r Working r r Drawings r for r r what r r purpose?
Answer: The electrician uses the Schedule of Working Drawings to determine
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whetherall of the drawings are at hand. The information on “the
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other sheets” may be very important, especially in coordinating with
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other contractors.
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4. Complete the following items by indicating the
r r r r r r r letter(s) designating r
the correctsource(s) of information:
r r r r
No. Answer Item Information
4. Sections Ceiling height r Sections, r r Sheet r r A6
5. Electrical Electrical Electrical symbol schedule, Chapter 2, r r r r
rsymbol receptacle
r Figure 2–6
r r
rschedule style
r
6. Electrical Electrical outlet r Electrical layout drawings, Sheets r r r
rlayout rlocation El,E2, and E3
r r r
rdrawing
r s
7. Elevations Exterior r wall finishes r Elevations, r r Sheets r r A4 r r and r r A5
8. Site plan r Grading r elevations Site plan, r r Sheet r A4
9. Electrical Panelboard schedules Electrical r layout r r drawings, r Sheet r E4
rlayout
rdrawing
r s
10. Architectural Room width r Architectural floor plan, Sheets r r r
floor plan
r r Al, A2,and A3
r r r
11. Architectural Swing r r of r r door Architectural r r floor r r plan, r r Sheets r r Al, r r A2,
floor plan
r r and A3 r
12. Sections View of interior wall
r r r Sections, r Sheet r A6
r Match r the r items r on r the r left r with r those r on r the r right r by r writing
r the letter
r
designation r ofthe r appropriate r organization r from r the r list r on r the r right.
13. NEC Electrical r Code National r r Electrical Code
(NEC)
14. IAEI Electrical r r inspectors International Association of r r
ElectricalInspectors (IAEI)
r r
, 15. NFPA Fire codes r National Fire r r Protection r r Association
(NFPA)
16. IESNA Lighting r information Illuminating Engineering r r r Society r r of
North America (IESNA) r r r r
17. UL Listing r r service Underwriters r r Laboratories, r r Inc. r r (UL)
18. NEMA Manufacturers’ National Electrical r
standards ManufacturersAssociation (NEMA)
r r
19. PE Seal Professional r r Engineer r r (PE)
Match the items on the left with those on the right by writing the
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letter designation ofthe proper level of NEC interpretation from the list
r r r r r r r r r r r r on
the right.
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20. with special r Allowed r by the Code r r Shall be permitted, r r r or Shall not r r r be
permission
r required, NEC r
21. with special r May be done r r Shall be permitted, or Shall r r r r
permission
r not berequired, NEC
r r r
22. shall Must r r be r r done Shall, r r National Electrical r r Code
23. shall Required r r by r r the Code Shall, r r National Electrical r r Code
24. never Up to the electrician
r r r Shall be permitted, r r r or Shall not be
r r r
required, NEC r
25. Find r NEC r r 250.52(A)(5) r r and r record r the r first r r four r r words.
Answer: The first four words of NEC 250.52(A)(5) are Rod and pipe electrodes.
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Show r required r r conversion r r calculations r r for r r problem r r 26 r r and r r problem r r 27.
26. Luminaire style r r F r is four feet long.
r r r r The r length r in r SI units, as r r r specified by r r the
r NEC, is r
Answer: The length in SI units is 1.22 m; 4 ft × 0.3048 m/ft =
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1.2192 m. As will be discussed later, this luminaire is now called a
r r r r r r r r r r r r r r 4
by 2 or the equivalent 1200 by 600 inmetric terms. This question
r r r r r r r r r r r r
assumes that the luminaire is exactly
r r r r r r
4 ft long. r r
27. The gross area of the drugstore
r r r r r r basement r is r 1395 r square
feet. The area in squaremeters is
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Answer: The r r area in r r SI units is r r r 129.7 sq. r r m; 1395 r r sq. ft × 0.093 r r r r sq. m/sq. ft = r r r
129.7 sq.m. r
, To answer Questions 28–31, refer to the Plans included with this book.
r r r r r r r r r r r
r Determine the Following dimensions. Write the dimensions using unit names, not symbols
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r(for example, 1 foot, not 1’), and indicate the source of the information.
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28. What is the r r r inside r clear r distance r of the r r interior r stairway r to r the r drugstore
basement? r
Answer: The inside clear distance of the interior stairway to the
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Drugstore basement is4 ft 0 in. (1.22 m), as scaled from Sheet A2.
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29. What r is r the r gross r square r footage r of r each floor r r of r the r building?
Answer: The gross area of each floor of the building r r r r r r r r r r is 60 ft × 43 ft r r r r r
= 2580 sq. ft (18.82m × 13.1 m = 246.5 sq. m), as
r r r r r r r r r r r r r r taken from Sheets r r
Al, A2, and A3.
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30. What is the distance in the drugstore from the exterior block
r r r r r r r r r r r wall
to the block wallseparating the drugstore from the bakery?
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Answer: The distance from the exterior block wall in the Drugstore to the block
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wall separating the Drugstore from the Bakery is 21 ft 7 in. (6.58 m), as shown
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on Sheet A2.
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31. What is r r the r finished r floor r to r finished r ceiling r height r on the r r second r floor?
Answer: The finished floor to finished ceiling height on the second floor is 8 ft 6 in.
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(2.59 m), as available from East and West Elevations A41–2, and Sheet A6, Cross
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rSections A–A and B–B. r r r
For problems 32–34, cite the NEC source. We will show the method
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of using the NECIndex for the first two questions in Chapter 1 and will provide this
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same method of locating requirements in other chapters of this book.
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32. The r r standard r r ampere r r ratings r r for r r fuses r r and r r fixed r r trip r r circuit r r breakers.
Answer: The standard r r r r r ampere r rating r for r fuses r r and r fixed r trip r circuit
breakers is given in
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NEC Table 240.6(A). r r
To find this information in the Index of the NEC, locate “Circuit breakers,
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Article 240, andlocate Rating and under that locate Fixed-Trip circuit
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breakers, 240.6(A)…”
r r
This
will provide the Section number for the ratings.
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33. The minimum bending radius for metal-clad cable with a smooth
sheath with anexternal diameter of 1 in.
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Answer: The minimum bending radius r for metal clad cable with a
r r r smooth
sheath withan external
r r r r diameter of 1 r r r in. (size 1) is given in NEC
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330.24(A)(2) as
r r
12 times the diameter. r r r
To find this information in the Index of the NEC,
r r r r r r r r r r r r r locate r “Metal-clad r Cable, r r Article r
330, andunder that locate “Bends, 330.24.” 330.24(A)(2).
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34. The r r permission r r to r r use r r splices r r in r r busbars r r as r r grounding r r electrode r r conductors.
Answer: The permission to use splices in busbars r r r r r r r r as r a r grounding
electrode conductoris given in NEC 250.64(C)(2).
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