| Preface |
|
xix | |
|
Chapter 1 Circuits, Formulas, and Voltage Drop Calculations |
|
|
1 | (1) |
|
|
|
1 | (1) |
|
Ohm's Law Diagram and Formulas |
|
|
2 | (1) |
|
Power Diagram and Formulas |
|
|
2 | (1) |
|
|
|
3 | (1) |
|
|
|
4 | (1) |
|
Three-Phase AC Circuits and the Utilization of Power |
|
|
5 | (1) |
|
|
|
5 | (1) |
|
|
|
5 | (1) |
|
|
|
5 | (1) |
|
Multi-Wire System Voltages |
|
|
6 | (2) |
|
|
|
8 | (1) |
|
Calculating Peak, Average, and Root-Mean-Square (RMS) Voltages |
|
|
8 | (1) |
|
|
|
9 | (1) |
|
|
|
9 | (1) |
|
|
|
10 | (1) |
|
True Power and Apparent Power |
|
|
11 | (1) |
|
|
|
11 | (1) |
|
|
|
12 | (1) |
|
Capacitor Correction for Three-Phase Motors |
|
|
13 | (1) |
|
Delta and Wye Resistor Circuits |
|
|
14 | (1) |
|
Summary of Series, Parallel, and Combination Circuits |
|
|
15 | (1) |
|
|
|
16 | (2) |
|
|
|
18 | (1) |
|
Capacitors Connected in Series/Parallel |
|
|
18 | (1) |
|
|
|
19 | (1) |
|
|
|
20 | (1) |
|
Inductors Connected in Series/Parallel |
|
|
20 | (1) |
|
|
|
21 | (1) |
|
Voltage Drop Using Ohm's Law |
|
|
22 | (1) |
|
|
|
22 | (1) |
|
Calculating Branch Circuit Voltage Drop in Percent |
|
|
22 | (1) |
|
|
|
23 | (1) |
|
Conductor Length/Voltage Drop |
|
|
23 | (1) |
|
Conductor Size/Voltage Drop |
|
|
23 | (1) |
|
Wire Length vs. Wire Size (Max Voltage Drop) |
|
|
24 | (1) |
|
|
|
25 | (1) |
|
|
|
26 | |
|
Chapter 2 Conduit, Cable, and Underground Installations |
|
|
1 | (1) |
|
|
|
2 | (1) |
|
|
|
3 | (1) |
|
|
|
4 | (2) |
|
|
|
6 | (1) |
|
Chicago-Type Conduit Bender---90° Bending |
|
|
7 | (1) |
|
Chicago-Type Conduit Bender---Offset Bending |
|
|
8 | (1) |
|
Multi-Shot 90° Conduit Bending |
|
|
9 | (3) |
|
|
|
12 | (1) |
|
|
|
12 | (1) |
|
|
|
12 | (1) |
|
EMT Take-up for Hand Benders |
|
|
13 | (1) |
|
|
|
13 | (1) |
|
Support Spacing for Rigid Metal Conduit |
|
|
13 | (1) |
|
Support Spacing for EMT and Metal Conduit |
|
|
13 | (1) |
|
Support Spacing for Rigid PVC |
|
|
14 | (1) |
|
Support Spacing for Flexible Conduits |
|
|
14 | (1) |
|
Expansion Characteristics of PVC Rigid Nonmetallic Conduit |
|
|
14 | (1) |
|
Conduit and Tubing---Allowable Area Dimensions for Wire Combinations |
|
|
15 | (3) |
|
Dimensions and Weights of Rigid Steel Conduit |
|
|
18 | (1) |
|
Dimensions of Threads for Rigid Steel Conduit |
|
|
18 | (1) |
|
Dimensions and Weights of Rigid Steel Couplings |
|
|
19 | (1) |
|
Dimensions and Weights of Rigid Steel 90& Elbows and Nipples |
|
|
19 | (1) |
|
Dimensions and Weights of EMT |
|
|
20 | (1) |
|
Dimensions of EMT 90° Elbows |
|
|
20 | (1) |
|
Conduit Master Bundles in Total Length and Weight |
|
|
21 | (1) |
|
Nonmetallic-Sheathed Cable (Types NM and NMC) |
|
|
22 | (1) |
|
Underground Feeder and Branch-Circuit Cable (Type UF) |
|
|
22 | (1) |
|
|
|
23 | (1) |
|
Service-Entrance Cable (Types SE and USE) |
|
|
23 | (1) |
|
Underground Installation Requirements |
|
|
24 | (2) |
|
Minimum Cover Requirements for Underground Installations |
|
|
26 | (2) |
|
Minimum Burial Depth Requirements Above 600 V |
|
|
28 | |
|
Chapter 3 Ampacity, Box Fill, Branch Circuits, Conductors, Enclosures, and Raceways |
|
|
1 | (1) |
|
Ampacity of Lamp and Extension Cords---Types S, SJ, SJT, SR SPT, and ST |
|
|
1 | (1) |
|
Vertical Conductor Supports |
|
|
1 | (1) |
|
|
|
2 | (1) |
|
|
|
2 | (1) |
|
Power Transformer Color Code |
|
|
2 | (1) |
|
|
|
3 | (1) |
|
|
|
3 | (1) |
|
Electrical Cable Class Ratings |
|
|
4 | (1) |
|
Cable Insulation Moisture Ratings |
|
|
4 | (1) |
|
|
|
4 | (1) |
|
|
|
5 | (3) |
|
|
|
8 | (2) |
|
Classifications of Hazardous Locations |
|
|
10 | (1) |
|
|
|
11 | (1) |
|
|
|
12 | (1) |
|
Sizes of Gutters and Wireways |
|
|
12 | (1) |
|
|
|
12 | (1) |
|
Sizes of Pull Boxes and Junction Boxes |
|
|
12 | (1) |
|
|
|
13 | (1) |
|
|
|
13 | (1) |
|
Switchboards or Switchgear |
|
|
13 | (1) |
|
Area Dimensions of Insulated Conductors |
|
|
14 | (2) |
|
Junction Box Calculations |
|
|
16 | (1) |
|
Conductor Volume Allowance |
|
|
16 | (1) |
|
|
|
17 | (1) |
|
Rigid Metal Conduit---Maximum Number of Conductors |
|
|
18 | (2) |
|
Liquidtight Flexible Metal Conduit---Maximum Number of Conductors |
|
|
20 | (2) |
|
Nonmetallic Tubing---Maximum Number of Conductors |
|
|
22 | (2) |
|
Electrical Metallic Tubing---Maximum Number of Conductors |
|
|
24 | (2) |
|
Flexible Metal Conduit---Maximum Number of Conductors |
|
|
26 | (2) |
|
Rigid PVC Schedule 40 Conduit---Maximum Number of Conductors |
|
|
28 | (2) |
|
Rigid PVC Schedule 80 Conduit---Maximum Number of Conductors |
|
|
30 | (2) |
|
|
|
32 | (1) |
|
Comparative Weights of Copper and Aluminum Conductors lb per 1,000 ft |
|
|
33 | (1) |
|
Copper Wire Specifications |
|
|
34 | (1) |
|
|
|
35 | (1) |
|
Conductor Dimensions and Resistances |
|
|
36 | (3) |
|
AC Resistance, Reactance, & Impedance for 1,000 Volt Cables Measured in Ohms to Neutral Per 1,000 Feet, 3 Phase, 60 Hz, 75°C Based on Three Single Conductors in PVC or Steel Conduit |
|
|
39 | (3) |
|
Ampacities of Copper Conductors (1) |
|
|
42 | (2) |
|
Ampacities of Copper Conductors (3) |
|
|
44 | (2) |
|
Ampacities of Aluminum or Copper-Clad Aluminum Conductors (1) |
|
|
46 | (2) |
|
Ampacities of Aluminum and Copper-Clad Aluminum Conductors (3) |
|
|
48 | (2) |
|
Ampacity Ratings for Flexible Cords and Power Cables at 30°C Ambient Temperature |
|
|
50 | (1) |
|
Ampacity Adjustments for 4 or More Conductors in a Cable or Raceway |
|
|
51 | (1) |
|
Ampacity Ratings for Single-Phase Service or Feeder Conductors in Normal Dwelling Units |
|
|
51 | (1) |
|
Branch-Circuit Requirements |
|
|
52 | (1) |
|
Branch-Circuit Permissible Loads |
|
|
53 | (1) |
|
Branch-Circuit Fixture Wire Tap Sizes |
|
|
53 | (1) |
|
Maximum Cord-and-Plug Connected Load to Receptacle |
|
|
54 | (1) |
|
Receptacle Ratings for Various Size Circuits |
|
|
54 | (1) |
|
Demand Factors for Household Electric Clothes Dryers |
|
|
54 | (1) |
|
Demand Factors for Nondwelling Receptacle Loads |
|
|
54 | (1) |
|
Demand Factors for Kitchen Equipment in Nondwelling Applications |
|
|
55 | (1) |
|
Lighting Load Demand Factors |
|
|
55 | (1) |
|
Lighting Loads by Occupancy |
|
|
56 | |
|
Chapter 4 Receptacles, Switches, Interior Wiring, and Lighting |
|
|
1 | (1) |
|
Receptacles in Damp Locations |
|
|
1 | (1) |
|
Receptacles in Wet Locations |
|
|
1 | (1) |
|
Tamper-Resistant Receptacles in Dwelling Units |
|
|
2 | (1) |
|
ARC-Fault Circuit-Interrupter Protection |
|
|
2 | (1) |
|
AFCI Receptacle Locations |
|
|
2 | (1) |
|
GFCI Receptacle Locations |
|
|
3 | (1) |
|
|
|
4 | (1) |
|
Wiring Diagrams for NEMA Plug and Receptacle Configurations |
|
|
5 | (5) |
|
Wiring Diagrams for AC Switches |
|
|
10 | (1) |
|
Wiring Diagrams for Pilot Light and Lighted Toggle Switches |
|
|
11 | (1) |
|
Family Room with Split-Wired Receptacles and Switched Circuit |
|
|
12 | (1) |
|
Residential Smoke Alarm Guidelines |
|
|
13 | (1) |
|
Residential Area Requirements for Smoke Alarm |
|
|
14 | (1) |
|
Smoke Alarm Wiring Requirements |
|
|
14 | (1) |
|
Family Room and Bedroom Receptacle Outlet Spacing |
|
|
15 | (1) |
|
Family Room Wiring Details |
|
|
16 | (1) |
|
Wetbar and Track Lighting Wiring Details |
|
|
16 | (1) |
|
|
|
17 | (1) |
|
Clothes Closet Wiring Details |
|
|
17 | (1) |
|
Hallway and Stairwell Wiring Details |
|
|
18 | (1) |
|
Laundry Room Wiring Details |
|
|
18 | (1) |
|
|
|
19 | (1) |
|
Countertop Receptacle Outlet Spacing |
|
|
20 | (1) |
|
|
|
21 | (2) |
|
Bathroom Receptacles and Spacing |
|
|
23 | (1) |
|
|
|
24 | (1) |
|
Crawl Space and Inside Equipment Wiring Details |
|
|
25 | (1) |
|
Unfinished Basement Wiring Details |
|
|
26 | (1) |
|
Garage and Shop Receptacles |
|
|
27 | (1) |
|
Garage and Shop Wiring Details |
|
|
28 | (1) |
|
Storage Area Wiring Details |
|
|
28 | (1) |
|
|
|
29 | (1) |
|
|
|
30 | (1) |
|
|
|
31 | (1) |
|
Lamp Advantages and Disadvantages |
|
|
32 | (1) |
|
|
|
32 | (1) |
|
Lumens, Life, and Efficacy for Various Lamps |
|
|
33 | (2) |
|
Light Source Characteristics |
|
|
35 | (1) |
|
|
|
36 | (1) |
|
|
|
36 | |
|
Chapter 5 Grounding and Bonding |
|
|
1 | (1) |
|
Resistivities of Different Metals |
|
|
1 | (1) |
|
Resistivities of Different Soils |
|
|
1 | (1) |
|
Basic Grounded Conductor Rules |
|
|
2 | (2) |
|
Grounded Conductor---Neutral |
|
|
4 | (1) |
|
Grounded Conductor---Not Neutral |
|
|
4 | (1) |
|
Grounding Different Types of Circuits |
|
|
5 | (2) |
|
Grounding an Existing Circuit |
|
|
7 | (1) |
|
Grounding a Screw-Shellbase |
|
|
7 | (1) |
|
Bonding a Typical Service Entrance |
|
|
8 | (1) |
|
Bonding Service Equipment Methods |
|
|
9 | (1) |
|
Bonding Jumpers for Grounding Equipment Conductor Raceways |
|
|
10 | (1) |
|
Equipment Bonding Jumpers |
|
|
11 | (1) |
|
Equipment Grounding Conductors |
|
|
12 | (1) |
|
Minimum Size Conductors for Grounding Raceway and Equipment |
|
|
13 | (1) |
|
Basic Grounding Connections |
|
|
14 | (1) |
|
Grounding Electrode Conductors for AC Systems |
|
|
15 | (1) |
|
Types of Grounding Methods per the NEC® |
|
|
16 | (1) |
|
Grounding a Basic Nonmetallic Underground Service Raceway |
|
|
17 | (1) |
|
Grounding a Basic Overhead Electrical Service |
|
|
18 | (1) |
|
General Requirements for Grounding and Bonding Services |
|
|
19 | (1) |
|
Grounding a Typical Residential Wiring System |
|
|
20 | (2) |
|
Grounded Primary Distribution System |
|
|
22 | |
|
|
|
1 | (1) |
|
Designing Motor Branch Circuits |
|
|
1 | (1) |
|
Motor Branch-Circuit Requirements |
|
|
2 | (2) |
|
NEMA Ratings of AC Motor Starters in Amps Per HP, Phase, and Voltage |
|
|
4 | (1) |
|
Full-Load Currents in Amps for Various Three-Phase AC Motors |
|
|
5 | (1) |
|
Three-Phase AC Motor Requirements |
|
|
6 | (2) |
|
Full-Load Currents in Amps for Single-Phase AC Motors |
|
|
8 | (1) |
|
|
|
8 | (1) |
|
Full-Load Currents in Amps for Direct Current Motors |
|
|
9 | (1) |
|
Direct Current Motor Requirements |
|
|
10 | (1) |
|
DC Motor Performance Characteristics |
|
|
11 | (1) |
|
Maximum Acceleration Time |
|
|
11 | (1) |
|
Horsepower Ratings for 240 Volt AC Safety Switches |
|
|
12 | (2) |
|
Maximum Rating or Setting of Motor Branch-Circuit Overcurrent Protective Devices in Percent of Full-Load Current |
|
|
14 | (1) |
|
Overload Device Placement |
|
|
15 | (1) |
|
|
|
16 | (1) |
|
|
|
16 | (1) |
|
|
|
16 | (1) |
|
|
|
16 | (1) |
|
Locked Rotor Current Formulas |
|
|
17 | (1) |
|
|
|
18 | (1) |
|
|
|
18 | (1) |
|
Motor Torque per Motor Speed |
|
|
19 | (3) |
|
|
|
22 | (1) |
|
Direct Current Motor Data |
|
|
23 | (1) |
|
Applications for Direct Current and Single-Phase Motors |
|
|
24 | (2) |
|
|
|
26 | (1) |
|
Applications for Squirrel-Cage Motors |
|
|
27 | (1) |
|
|
|
28 | (1) |
|
|
|
29 | (1) |
|
Applications for Wound-Rotor and Synchronous Motors |
|
|
30 | (1) |
|
Types of Motor Enclosures |
|
|
31 | (1) |
|
|
|
31 | (1) |
|
|
|
32 | (1) |
|
Shaft Coupling Selections |
|
|
32 | (1) |
|
|
|
33 | (1) |
|
|
|
33 | (1) |
|
NEMA Motor Frame Dimensions |
|
|
34 | (1) |
|
Frontal View of a Typical Motor |
|
|
35 | (1) |
|
Reference Page 6-34 for Dimensions |
|
|
35 | (1) |
|
Side View of a Typical Motor |
|
|
35 | (1) |
|
Rotation and Terminal Markings for Direct Current Motors |
|
|
36 | (1) |
|
Rotation and Terminal Markings for Single-Phase Motors |
|
|
37 | (1) |
|
Split-Phase, Squirrel-Cage Motors |
|
|
37 | (2) |
|
Split-Phase Motor Rotation |
|
|
39 | (1) |
|
Delta-Wound Motor Connections 240/480 V |
|
|
40 | (1) |
|
Wye-Wound Motor Connections 240/480 V |
|
|
40 | (1) |
|
Dual-Voltage, 3 φ, Wye-Connected Motors |
|
|
41 | (1) |
|
Dual-Voltage, 3φ, Delta-Connected Motors |
|
|
42 | (1) |
|
Star-Connected, Polyphase Motor |
|
|
43 | (1) |
|
Reversing Three-Phase Motors |
|
|
43 | (1) |
|
Motor Control Circuit Schematics |
|
|
44 | (1) |
|
Wiring Diagram of a Single-Phase Motor Connected to a Three-Phase Motor Starter |
|
|
45 | (1) |
|
Wiring Diagram of Hand Off Motor Control |
|
|
46 | (1) |
|
Wiring Diagram of Jogging with Control Relay |
|
|
47 | (1) |
|
Contactor and Motor Starter Troubleshooting Guide |
|
|
48 | (2) |
|
Direct Current Motor Troubleshooting Guide |
|
|
50 | (2) |
|
Three-Phase Motor Troubleshooting Guide |
|
|
52 | (2) |
|
Split-Phase Motor Troubleshooting Guide |
|
|
54 | |
|
|
|
1 | (1) |
|
Sizing Transformer Circuits |
|
|
1 | (1) |
|
|
|
2 | (1) |
|
|
|
3 | (1) |
|
Feeder Tap and Transformer Tap Installation Guidelines |
|
|
4 | (1) |
|
Transformer Feed Tap Not Over 25 Feet Long |
|
|
5 | (1) |
|
Sizing Single-Phase Transformers |
|
|
6 | (1) |
|
Sizing Three-Phase Transformers |
|
|
7 | (1) |
|
Transformer Deratings Resulting from Higher Ambient Temperatures |
|
|
8 | (1) |
|
Calculating Derated kVA Capacity from Higher Ambient Temperatures |
|
|
8 | (1) |
|
Current-Voltage Relationship Between High Side and Low Side of a Transformer |
|
|
9 | (1) |
|
Testing a Transformer for Polarity |
|
|
9 | (1) |
|
Diagram of a Current Transformer |
|
|
9 | (1) |
|
Single-Phase Transformer Circuits |
|
|
10 | (1) |
|
Single-Phase Transformer Connections |
|
|
11 | (3) |
|
Various Transformer Connections |
|
|
14 | (1) |
|
Three-Phase Transformer Connections |
|
|
15 | (8) |
|
|
|
23 | (1) |
|
An Additive-Polarity Transformer |
|
|
23 | (1) |
|
|
|
24 | (1) |
|
Loads Connected Between Transformer Supply Points |
|
|
24 | (1) |
|
|
|
25 | (1) |
|
Typical Boost Transformer Connections |
|
|
26 | (1) |
|
Typical Buck Transformer Connections |
|
|
27 | (1) |
|
|
|
28 | (1) |
|
Transforming Winding Ratios |
|
|
28 | (1) |
|
Satisfactory Voltage Levels |
|
|
28 | |
|
Chapter 8 Communications and Electronics |
|
|
1 | (1) |
|
|
|
1 | (1) |
|
Standard Telecom Color Coding |
|
|
2 | (1) |
|
Separation and Physical Protection for Premises Wiring |
|
|
3 | (1) |
|
Minimum Separation Distance from Power Source at 480 V or Less |
|
|
3 | (1) |
|
Conductors Entering Buildings |
|
|
4 | (1) |
|
Circuit Protection Requirements |
|
|
4 | (1) |
|
Interior Communications Conductors |
|
|
5 | (1) |
|
|
|
6 | (1) |
|
|
|
6 | (1) |
|
Twisted-Pair Plugs and Jacks |
|
|
6 | (1) |
|
|
|
6 | (1) |
|
|
|
7 | (1) |
|
|
|
7 | (1) |
|
Installation Requirements |
|
|
7 | (1) |
|
|
|
7 | (1) |
|
Standard Configurations for Several Common Networks |
|
|
8 | (1) |
|
Ethernet 10BaseT, Straight-Thru Patch Cord |
|
|
8 | (1) |
|
Ethernet 10ESaseT, Crossover Patch Cord |
|
|
8 | (1) |
|
EIA-606 Colors and Functions of Cabling |
|
|
8 | (1) |
|
|
|
9 | (1) |
|
Wiring Guide for Thermostat, Furnace, and Air Conditioning |
|
|
9 | (1) |
|
|
|
10 | (1) |
|
Twin-Type Thermostat Circuit |
|
|
11 | (1) |
|
Intruder Alarm Circuit with Annunciator and Relay |
|
|
12 | (1) |
|
Electronic Wiring Color Codes |
|
|
13 | (1) |
|
Color Codes for Resistors |
|
|
14 | (1) |
|
Standard Values for Resistors |
|
|
15 | (1) |
|
|
|
15 | (1) |
|
Color Codes for Capacitors |
|
|
16 | (1) |
|
Color Codes for Ceramic Capacitors |
|
|
16 | (1) |
|
Characteristics of Lead-Acid Batteries |
|
|
17 | (1) |
|
Magnetic Permeability of Some Common Materials |
|
|
17 | (1) |
|
Transistor Circuit Abbreviations |
|
|
17 | (1) |
|
Radio Frequency Classifications |
|
|
17 | (1) |
|
|
|
18 | |
|
Chapter 9 Electrical and Job Safety |
|
|
1 | (1) |
|
Electrical Safety Guidelines |
|
|
1 | (1) |
|
Effect of Electric Current on the Human Body |
|
|
2 | (1) |
|
Electrical Safety Checklist |
|
|
3 | (1) |
|
Lockout/Tagout Procedures |
|
|
4 | (1) |
|
|
|
5 | (1) |
|
|
|
5 | (1) |
|
Top OSHA Electrical Violations |
|
|
6 | (1) |
|
Wiring Design and Protection for Construction Sites |
|
|
7 | (3) |
|
Required Working Clearance---Minimum Depth in Feet |
|
|
10 | (1) |
|
Minimum Elevation of Unguarded Live Parts Above Working Space in Feet |
|
|
10 | (1) |
|
Minimum Clearance---Live Parts |
|
|
11 | (1) |
|
|
|
12 | (1) |
|
Electrical Glove Inspection |
|
|
13 | (1) |
|
Tree Trimming and Removal Safety |
|
|
14 | (1) |
|
Portable Generator Safety |
|
|
15 | (1) |
|
|
|
16 | (4) |
|
Types of Fire Extinguishers |
|
|
20 | |
|
Chapter 10 Materials and Tools |
|
|
1 | (1) |
|
Strength Gain vs. Pull Angle |
|
|
1 | (1) |
|
Length of Wire Cable Per Reel |
|
|
1 | (1) |
|
Sheet Metal Screw Characteristics |
|
|
2 | (1) |
|
Wood Screw Characteristics |
|
|
3 | (1) |
|
Hex Head Bolt and Torque Characteristics |
|
|
4 | (2) |
|
Whitworth Hex Head Bolt and Torque Characteristics |
|
|
6 | (1) |
|
Metric Hex Head Bolt and Torque Characteristics |
|
|
7 | (1) |
|
Allen Head and Machine Screw Bolt and Torque Characteristics |
|
|
8 | (1) |
|
Tightening Torque in Pound-Feet-Screw Fit |
|
|
9 | (1) |
|
|
|
9 | (1) |
|
|
|
10 | (1) |
|
Taps and Dies---Metric Conversions |
|
|
11 | (1) |
|
Recommended Drilling Speeds |
|
|
12 | (1) |
|
Torque Lubrication Effects in Foot-Pounds |
|
|
13 | (1) |
|
|
|
13 | (1) |
|
|
|
14 | (1) |
|
|
|
14 | (1) |
|
|
|
14 | (1) |
|
Properties of Welding Gases |
|
|
15 | (1) |
|
|
|
15 | (1) |
|
|
|
16 | (2) |
|
Standard V Belt Lengths in Inches |
|
|
18 | (2) |
|
Extension Cord Sizes for Portable Tools |
|
|
20 | |
|
Chapter 11 Conversion Factors, Mathematics, and Units of Measurement |
|
|
1 | (1) |
|
Commonly Used Conversion Factors |
|
|
1 | (4) |
|
|
|
5 | (1) |
|
Decimal Equivalents of Fractions |
|
|
6 | (1) |
|
Millimeter and Decimal Inch Equivalents |
|
|
7 | (1) |
|
|
|
8 | (2) |
|
|
|
10 | (2) |
|
|
|
12 | (4) |
|
Commonly Used Geometrical Relationships |
|
|
16 | (1) |
|
Common Engineering Units and Their Relationship |
|
|
17 | (1) |
|
Conversion Table for Temperature---°F/°C |
|
|
18 | (2) |
|
|
|
20 | (1) |
|
|
|
20 | (1) |
|
Common Electrical Quantities |
|
|
20 | (1) |
|
|
|
20 | |
|
|
|
1 | (1) |
|
|
|
1 | (1) |
|
|
|
2 | (2) |
|
|
|
4 | (2) |
|
|
|
6 | (3) |
|
Panelboards, Switchboards, and Related Equipment |
|
|
9 | (1) |
|
|
|
9 | (1) |
|
|
|
10 | (4) |
|
|
|
14 | (1) |
|
Pushbutton, Momentary, or Spring Return |
|
|
14 | (1) |
|
Pushbutton, Maintained, or No-Spring Return |
|
|
14 | |
|
|
|
1 | |
