This book is the English version of the Low Voltage Electrician Certification Training Course (Video version) (ISBN: 978-7-122-35692-5). It includes 12 chapters: safety production instructions for electricians safety laws and regulations， basic knowledge of electrician， electrical tools and safety signs， low voltage electrical apparatus， asynchronous motor， electrical line， electrical lighting， power capacitor， use of safety tools， safe operation technology， elimination of potential safety hazards at the operation site， and emergency response at operation site. Furthermore， the examination question bank is also attached. It has all the characteristics of the new form of teaching materials.
Chapter 1 Safety Production Instructions for Electricians 001
1.1 Laws and regulations on safety production 002
1.1.1 Regulations on Management of Safety Technology Training and Assessment for Special Operation Personnel 002
1.1.2 The Production Safety Law of the People′s Republic of China 003
1.1.3 Other laws and regulations 006
1.2 Safety protection and electric shock prevention measures 008
1.2.1 Organizational measures to ensure the safety of electricians 008
1.2.2 Technical measures to prevent electric shock 011
1.3 Electrical accident and first aid for electric shock 019
1.3.1 Harm of electric current to human body 019
1.3.2 Causes and types of electric shock 021
1.3.3 Electric shock mode 022
1.3.4 Electrical accident 024
1.3.5 First aid operation for electric shock 025
1.4 Electrical fire protection， explosion-proof， lightning protection and anti-static 029
1.4.1 Electrical fire and explosion prevention 029
1.4.2 Electrical lightning protection and anti-static 032
Chapter 2 Basic knowledge of electrical safety technology 035
2.1 Basic knowledge of direct current (DC) circuit 036
2.1.1 Circuit and its basic physical quantities 036
2.1.2 Ohm′s Law 039
2.1.3 Series and parallel connection of resistance 040
2.1.4 Kirchhoff′s Law and its application 042
2.1.5 Series and parallel connection of capacitors 043
2.2 Basic electromagnetic knowledge 044
2.2.1 Magnetic field of current 044
2.2.2 Basic physical quantity of magnetic field 046
2.2.3 Left-hand rule 047
2.2.4 Electromagnetic induction phenomenon and Lenz′s Law 048
2.2.5 Self-inductance and mutual inductance 050
2.3 Fundamentals of alternating current (AC) 051
2.3.1 Single phase sinusoidal AC 051
2.3.2 Three phase AC 054
2.4 Fundamentals of electronic technology 061
2.4.1 Crystal diode and rectifier circuit 061
2.4.2 Crystal triode and its amplification circuit. 066
2.4.3 Voltage stabilizing circuit 070
Chapter 3 Electrical tools and safety signs 073
3.1 Use of electrical tools and safety tools 074
3.1.1 Use of common electrical tools 074
3.1.2 Use of other electrical tools 077
3.1.3 Use of manual electric tools 080
3.1.4 Use of electrical safety appliances 082
3.2 Use of common electrical instruments 083
3.2.1 Use of multimeter 083
3.2.2 Use of clamp ammeter 094
3.2.3 Use of insulation resistance meter 097
3.2.4 Use of electric energy meter 100
3.2.5 Use of ammeter 102
3.2.6 Use of voltmeter 104
3.3 Electrical safety signs 105
3.3.1 Electrical safety color 105
3.3.2 Electrical safety sign board 106
Chapter 4 Low-voltage electrical apparatus 109
4.1 Basic knowledge of low-voltage apparatus 110
4.1.1 Classification of low-voltage apparatus 110
4.1.2 Common terms of low-voltage apparatus 113
4.1.3 Selection and installation of low-voltage electrical apparatus 114
4.2 Low-voltage circuit breaker and leakage protector 116
4.2.1 Low-voltage circuit breaker 116
4.2.2 Leakage protector 118
4.3 Contactor and Relay 119
4.3.1 Contactor 119
4.3.2 Relay 122
4.4 Fuse and master switch 128
4.4.1 Fuse 128
4.4.2 Master switch 130
Chapter 5 Asynchronous motor 133
5.1 Basic knowledge of asynchronous motor 134
5.1.1 Brief introduction to motor 134
5.1.2 Structure and principle of asynchronous motor 138
5.1.3 Characteristics of asynchronous motor 142
5.2 Starting and running of asynchronous motor 145
5.2.1 Starting of asynchronous motor 145
5.2.2 Running of asynchronous motor 150
5.3 Fault inspection and maintenance of asynchronous motor 152
5.3.1 Fault inspection and maintenance of three phase cage asynchronous motor 153
5.3.2 Fault inspection and maintenance of three phase wound asynchronous motor 157
Chapter 6 Electrical line 159
6.1 Types and characteristics of electrical line 160
6.1.1 Overhead line 160
6.1.2 Cable line 163
6.1.3 Indoor line 165
6.2 Safety of electrical lines 165
6.2.1 Conductivity 165
6.2.2 Mechanical strength 166
6.2.3 Spacing 167
6.2.4 Identification and connection of conducting wires 168
6.2.5 Line protection 175
6.2.6 Line management 176
Chapter 7 Electrical lighting 179
7.1 Electrical lighting mode and type 180
7.1.1 Modes of electric lighting 180
7.1.2 Types of electrical lighting 182
7.2 Installation and maintenance of lighting equipment 183
7.2.1 Installation of lighting equipment 183
7.2.2 Lighting circuit trouble shooting 189
Chapter 8 Power capacitor 195
8.1 Brief introduction to power capacitor 196
8.1.1 Classification and application of power capacitors 196
8.1.2 Structure and compensation principles of power capacitor 197
8.2 Installation requirements and wiring of power capacitor 198
8.2.1 Installation requirements of power capacitor 198
8.2.2 Wiring of power capacitor 200
8.3 Safe operation of power capacitor 202
8.3.1 Operation and maintenance of capacitor 202
8.3.2 Trouble shooting of capacitors 203
Chapter 9 Use of safety tools (K1) 205
9.1 Safe use of electrical instruments (K11) 206
9.2 Use of electrical safety appliances (K12) 219
9.3 Identify electrical safety signs (K13) 223
Chapter 10 Safe operating technology (K2) 227
10.1 Practical examination platform and examination instructions 228
10.1.1 Cognition of practical examination platform 228
10.1.2 Instruction to practical examination 232
10.2 Simulation equipment examination training project 234
10.2.1 Wiring and safe operation of electric drive circuit 234
10.2.2 Wiring and safe operation of lighting circuit 244
10.3 Equipment examination training project 255
10.3.1 Wiring and safe operation of electric drive circuit 255
10.3.2 Wiring and safe operation of lighting circuit 267
Chapter 11 Elimination of potential safety hazards at the operation site (K3) 275
Chapter 12 Emergency response at operation site (K4) 287
12.1 Emergency response and first aid for electric shock 288
12.2 Fire extinguishing simulation with fire extinguisher 294
Appendix 1 Single choice question bank 299
Appendix 2 Judgment question bank 349
References 405
內容試閱：
Working with certificates for special operations is a mandatory requirement of The Production Safety Law of the People′s Republic of China， the Regulations on the Administration of Safety Technology Training and Assessment for Special Operation Personnel (Order No. 30 of the State Administration of Work Safety) and other local laws and regulations， which is related to safe production and the safety of the national economy and people′s lives and property.
The Low-voltage Electrician Certificate is one of the most widely used and representative one， but it currently has the following problems:
① Although there are hundreds of thousands of foreign employees in China， there are many deficiencies and blanks in relevant training and certification， one of which is the lack of textbooks;
② With the new Vocational Education Law of the People′s Republic of China as the prelude， the reform of vocational education in the new era would go overseas: the recruitment and training of foreign students in vocational education has been in full swing， but the teaching materials are almost blank;
③ The anti-globalization originated by the west would accelerate the ″going overseas″ of China′s industry and production capacity， especially for BRI countries， which would inevitably be accompanied by the ″going overseas″ of technology and standards， but the relevant carrier medias are extremely limited or even blank.
Therefore， the translating team hopes to help solve the above problems through the publishing of this book.
The translation of this book has received strong support from all parties: Prof. Qingde Yang， the chief editor of the Chinese version， has made a decision to support this job from stranger to full support through a 5-minute phone call， and has provided countless direct and comprehensive help throughout the translation process. After knowing that the funds were limited， Prof. Yang and his team immediately decided to waive the copyright fee. Their noble character and integrity contributed to the publication of the book; Mr. Gang Li， secretary of the Automobile Engineering School of Beijing Polytechnic， and Mr. Weijie Gou， director of the Automobile Manufacturing Technology Department of the same college， provided support in the whole process from project approval， funds， and until solving other difficulties in the process， making the publication of the book possible; Ms. Na Yu， the senior manager of the training department of Beijing Benz Automobile Co.， Ltd.， immediately provided various supports and volunteered to become a member of the translating team after knowing this job， sharing a lot of translation and proofreading work. I would like to express my sincere thanks to the numerous leaders， colleagues and friends who have given us help.
The translation and publishing time of the book is extremely tight， and the translating members have their own main jobs， all the jobs are completed in spare time， which is very heavy and urgent even if they are full-time. Here， I also pay high tribute to the members of the translating team.
Due to the limited capability of translation and the limited time， it is inevitable that there will be some mistakes or omissions. We hope our potential readers could give us your advice (qinhe848@163.com)， with a view to revising it when it is republished.
Guoping Huang (Mr.)
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