Troubleshooting and repairing commercial electrical equipment

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A PRACTICAL GUIDE that shows maintenance and construction electricians how to successfully repair commercial and industrial electrical equipment

Troubleshooting and Repairing Commercial Electrical Equipment is the first work that offers a practical approach to diagnosing and repairing commercial/industrial electrical equipment - covering everything from motors, computers, elevators, and fire alarm systems to heavy-duty ovens and audio equipment. If you are a licensed construction or maintenance electrician who repairs malfunctioning industrial electrical equipment, this one-of-a-kind guide can help you become more competent in your profession.

Inside you'll find ways to become faster, more efficient, and able to achieve a much higher success rate in restoring large electrical equipment without damaging it, introducing an additional defect, or creating a hazard. This invaluable resource also includes information for those seeking licensing and certification, as well as different measures that should be taken to ensure that a UL or other agency listing is not voided.

Presents a new system of diagnostics based on the difficulty of each procedure and the probability of its success Emphasizes a practical approach to ensure that equipment is fixed properly Uses a blend of basic electrical theory and sophisticated mathematical equations that both experienced technicians and apprentices can learn from Includes separate chapters on elevators, fire alarm systems, motors, largescale stereo equipment, and industrial appliances Discusses related licensing and certification as they pertain to troubleshooting and repair Written by a Master Electrician with more than 35 years of experience

Author Notes

David Herres is the owner and operator of a residential and commercial construction company. He obtained a Journeyman Electrician's License in 1975, and has certificates in welding and wetland delineation, along with experience with elevators. Beginning in 2001, Mr. Herres has focused primarily on electrical work, upgrading his license to Master status. He is the author of 2011 National Electrical Code Chapter-By-Chapter . The author of an article for Electrical, Construction, and Maintenance on complimentary wiring methods, Mr. Herres has written nearly 70 articles on electrical and telecom wiring.

Preface	p. ix
1 Troubleshooting Techniques	p. 1
Entering the Field	p. 3
Getting Started	p. 5
Electronic Components	p. 7
What's the Significance?	p. 8
Frequency Is All-Important	p. 12
Multiple Circuit Elements	p. 15
Looking at Transformers	p. 17
What Is an Autotransformer?	p. 17
Inside a Diode	p. 19
Testing a Diode	p. 23
Transistors Have Multiple Uses	p. 24
Using the Diode Check Function	p. 27
What Is a MOSFET?	p. 30
Varieties of Test Equipment	p. 34
More Advanced Testing	p. 38
More PCB Repair Techniques	p. 38
An Essential Skill	p. 41
2 Electric Motors	p. 47
Easy Motor Repairs	p. 47
Two Parts of All Motors	p. 48
Slip in an Induction Motor	p. 52
A Common Fault	p. 55
Going Deeper	p. 57
Other Motor Test Procedures	p. 61
Additional Considerations	p. 65
NEC and the Motor	p. 67
The Relevance of Article 725	p. 72
Types of Motor Controllers	p. 75
3 Residential Wiring	p. 77
Problem Solving	p. 78
A Hazardous Situation	p. 79
A Thought Experiment	p. 84
Nuisance Tripping	p. 87
An Easy Job	p. 89
4 Commercial and Industrial Wiring	p. 91
Using Type NM	p. 91
Simple Conduit Bends	p. 93
Identifying Wires	p. 96
PLC Anatomy	p. 97
5 Electrical Power Distribution Systems Including Transformers	p. 101
Problem Solving	p. 102
SCADA and Remote Monitoring	p. 105
Wye and Delta	p. 106
Code Navigation	p. 107
Solar Difficulties	p. 108
6 Telephone Systems	p. 111
PBX and Multiplexing	p. 112
Phone Diagnosis and Repair	p. 114
Dead Phone Syndrome	p. 115
Why Use Cat 5e?	p. 116
7 Audio and Video Equipment	p. 119
Optimum Sound	p. 120
Audio Fundamentals	p. 122
TV Repair Procedures	p. 124
8 Computer Troubleshooting and Repair	p. 127
BIOS Start-Up	p. 128
Hardware versus Software	p. 129
More Mac Subsystems	p. 131
HTML Coding	p. 133
Principle HTML Tags	p. 134
9 Understanding Ethernet and Learning to Create a Simple Network	p. 137
Ethernet Terminations	p. 138
Mitigating Fire Hazards	p. 140
Building Ethernet Cables	p. 142
10 Satellite Dishes for Communication Systems	p. 145
Waveguide Technology	p. 145
What Is Characteristic Impedance?	p. 149
Dish System Inner Workings	p. 153
Troubleshooting Dish Systems	p. 155
11 Elevators	p. 157
Elevator Wiring Protection	p. 158
Specialized Requirements	p. 160
The Next Step	p. 163
Fire Service Mode	p. 165
12 Fire Alarm Systems	p. 167
Fire Alarm System Fundamentals	p. 169
Altered States	p. 172
Sprinkler Varieties	p. 174
Easy Remedies	p. 176
Drastic Measures	p. 179
13 Troubleshooting Refrigeration Equipment	p. 181
Refrigerant Circuit	p. 183
Refrigeration Repairs	p. 184
Compressor Fault Modes	p. 186
Back to NEC	p. 189
14 Healthcare Facilities	p. 191
Know Your Definitions	p. 192
When You Need Redundant Grounding	p. 194
How Many Receptacles?	p. 195
Systems within Systems	p. 198
15 Solar and Wind Power	p. 203
Joining the Grid	p. 205
Batteries (When Needed)	p. 207
Mandatory Disconnects	p. 211
When Output Declines	p. 217
Big Machines	p. 221
16 Oscilloscopes Revisited	p. 223
Further Developments	p. 224
Improved Scopes	p. 225
Probes	p. 227
Acquiring a Good Display	p. 229
17 What Lies Ahead?	p. 233
Probing the Universe	p. 234
Leaving Earth	p. 237
Coherent Light	p. 239
Disorganized Light	p. 240
Finding the Fault	p. 245
Index	p. 249

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Author Notes

Table of Contents