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C H A P T E R O N E

General Information

1.0 INTRODUCTION

This chapter provides information of a general nature that is frequentlyneeded by the electrical design professional. Information that follows insubsequent chapters is more specific and closely follows the designprocess.

1.1 CHECKLISTS

The following checklists should prove useful in the execution of proj-ects.

1

Source: ELECTRICAL ENGINEERS PORTABLE HANDBOOK

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2 Electrical Engineers Portable Handbook

FIGURE 1.1 Project to do checklist (electrical).

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General Information 3

FIGURE 1.1 Project to do checklist (electrical). (Continued)

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4 Electrical Engineers Portable Handbook

FIGURE 1.1 Project to do checklist (electrical). (Continued)

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General Information 5

FIGURE 1.2 Drawing design checklist (electrical).

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6 Electrical Engineers Portable Handbook

FIGURE 1.2 Drawing design checklist (electrical). (Continued)

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General Information 7

FIGURE 1.2 Drawing design checklist (electrical). (Continued)

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8 Electrical Engineers Portable Handbook

FIGURE 1.3 Site design checklist (electrical).

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General Information 9

FIGURE 1.3 Site design checklist (electrical). (Continued)

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10 Electrical Engineers Portable Handbook

FIGURE 1.4 Existing condition service & distribution checklist.

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General Information 11

FIGURE 1.4 Existing condition service & distribution checklist. (Continued)

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12 Electrical Engineers Portable Handbook

FIGURE 1.4 Existing condition service & distribution checklist. (Continued)

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General Information 13

FIGURE 1.5 Design coordination checklist (electrical).

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14 Electrical Engineers Portable Handbook

FIGURE 1.5 Design coordination checklist (electrical). (Continued)

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General Information 15

FIGURE 1.5 Design coordination checklist (electrical). (Continued)

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16 Electrical Engineers Portable Handbook

FIGURE 1.6 Fire alarm system checklist.

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General Information 17

FIGURE 1.6 Fire alarm system checklist. (Continued)

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18 Electrical Engineers Portable Handbook

FIGURE 1.6 Fire alarm system checklist. (Continued)

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1.2 ELECTRICAL SYMBOLS AND MOUNTING HEIGHTS

Electrical Symbols

Electrical symbols can vary widely, but the following closely adhere toindustry standards. Industry standard symbols are often modified tomeet client and/or project specific requirements.

General Information 19

FIGURE 1.7 Electrical symbols.

General Information

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20 Electrical Engineers Portable Handbook

FIGURE 1.7 Electrical symbols. (Continued)

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General Information 21

FIGURE 1.7 Electrical symbols. (Continued)

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22 Electrical Engineers Portable Handbook

FIGURE 1.7 Electrical symbols. (Continued)

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General Information 23

FIGURE 1.7 Electrical symbols. (Continued)

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24 Electrical Engineers Portable Handbook

FIGURE 1.7 Electrical symbols. (Continued)

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General Information 25

FIGURE 1.7 Electrical symbols. (Continued)

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26 Electrical Engineers Portable Handbook

FIGURE 1.7 Electrical symbols. (Continued)

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General Information 27

FIGURE 1.7 Electrical symbols. (Continued)

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28 Electrical Engineers Portable Handbook

FIGURE 1.7 Electrical symbols. (Continued)

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General Information 29

FIGURE 1.7 Electrical symbols. (Continued)

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Mounting Heights

Mounting heights of electrical devices are influenced by and must beclosely coordinated with the architectural design. However, there areindustry standard practices followed by architects as well as code andlegal requirements, such as Americans with Disabilities Act (ADA)guidelines. The following recommended mounting heights for electricaldevices provide a good guideline in the absence of any specific infor-mation and are ADA compliant.

30 Electrical Engineers Portable Handbook

TABLE 1.1 Mounting Heights for Electrical Devices

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General Information 31

TABLE 1.1 Mounting Heights for Electrical Devices (Continued)

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32 Electrical Engineers Portable Handbook

TABLE 1.1 Mounting Heights for Electrical Devices (Continued)

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1.3 NEMA DEVICE CONFIGURATIONS

Nonlocking

General Information 33

FIGURE 1.8 Configuration chart for general-purpose nonlocking plugs andreceptacles.

(1999, NFPA)

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Locking

34 Electrical Engineers Portable Handbook

FIGURE 1.9 Configuration chart for specific-purpose locking plugs andreceptacles.

(1999, NFPA)

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1.4 IEEE STANDARD ELECTRICAL POWER SYSTEM DEVICE

FUNCTION NUMBERS AND CONTACT DESIGNATIONS

General Information 35

FIGURE 1.10

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36 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 37

FIGURE 1.10 (Continued)

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38 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 39

FIGURE 1.10 (Continued)

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40 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 41

FIGURE 1.10 (Continued)

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42 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 43

FIGURE 1.10 (Continued)

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44 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 45

FIGURE 1.10 (Continued)

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46 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 47

FIGURE 1.10 (Continued)

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48 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 49

FIGURE 1.10 (Continued)

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50 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 51

FIGURE 1.10 (Continued)

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52 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 53

FIGURE 1.10 (Continued)

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54 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 55

FIGURE 1.10 (Continued)

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56 Electrical Engineers Portable Handbook

FIGURE 1.10 (Continued)

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General Information 57

FIGURE 1.10 (Continued)

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TABLE1

.2

Comparisono

fSpecif

icApp

licationso

fEnc

losur

es

for

Indoor

Non

hazardou

sLocations

TABLE1

.3

Comparisono

fSpecif

icApp

licationso

fEnc

losur

es

for

Outdoor

Non

hazardous

Locations

59

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TABLE1

.4

Comparisono

fSpeci

fic

App

lications

for

Indoor

Hazardous

Locations

TABLE1

.5

Knoc

kout

Dimens

ions

60

General Information

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General Information 61

1.6 FORMULAS AND TERMS

FIGURE 1.11 Formulas and terms.

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62 Electrical Engineers Portable Handbook

1.7 TYPICAL EQUIPMENT SIZES AND WEIGHTS

Tables 1.6 to 1.11 provide typical equipment sizes and weights to assistin the preliminary design and layout of an electrical distribution system.The reader is cautioned that this data is only representative of industrymanufacturers and should consult specific vendors for detailed infor-mation.This information could prove useful in determining initial spacerequirements and weight impacts for structural purposes.

1.8 SEISMIC REQUIREMENTS

The design of seismic restraint systems for electrical distribution equip-ment and raceways is usually done by a structural engineer through per-formance specifications by the electrical design professional. It istherefore necessary for the electrical designer to be generally familiarwith the seismic code requirements and the seismic zone that are applic-able to a project. Figure 1.12 will serve as an introduction.

TABLE 1.6 Typical Equipment Sizes600-Volt Class

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TABLE 1.7 Transformer Weight (lbs) by KVA

TABLE 1.8 Generator Weight (lbs) by KW

TABLE 1.9 Weight (lbs/lf) of Four-Pole Aluminum and Copper Bus Duct byAmpere Load

63

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TABLE

1.

10

Con

du

itWe

ight

Comparisons

(lbsper

100ft)Empty

TABLE

1.

11

Con

du

itWe

ight

Com

parisons

(lbsper

100ft)w

ithMax

imum

Ca

bleFill

64

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F

IGURE

1.

12

Se

ism

icrequ

irements

.(a)Se

ism

iczonemapo

fthe

Un

ite

dStates

.(b)Norma

lize

d

responsespectras

hapes

.

65

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F

IGURE

1.

11

Se

ism

icrequ

irements

.(a)Se

ism

iczone

mapo

fthe

Un

ite

dStates.

(b)Norma

lize

d

responsespectras

hapes

.(Continued)

66

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NOTES

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