This book offers a comprehensive approach to the assessment of fire hazards of electrical cables. The first part of the book describes division of cables, main parameters of electrical cables, and fault scenarios of cables leading to fire or occupant injuries. The traditional approach to fire hazards of electrical cables assessment is also described in the first part. The second part of the book is focused on the creation and description of a new approach to fire hazard assessment of electrical cables. The new approach is based on the assessment of both ignition parameters of electrical cables and the impact of their fires on the surrounding area. The ignition parameters include critical heat flux, ignition temperature, and critical electrical current. The impact of cable fires on the surrounding area is expressed by the released heat, toxicity of combustion products (determined by the amount of released carbon oxides and oxygen consumed), and visibility (determined by the smoke extinction area). Newly created approach is practically illustrated on specific types of cables (power cables classified to B2ca and Fca reaction to fire class) in this book.
The book is intended mainly for academics in the fields of both fire protection engineering and electrical engineering. Besides that, the professionals in fire safety will find valuable information concerning impact of electrical cables on the safety of occupants and structures during fire in the book. In addition, the book sheds light on the issue of fire safety of electrical cables for the professionals in both electrical and power engineering. Last but not least, the book is appropriate also for students in the fields of fire, electrical, and power engineering in bachelor, master, and Ph.D. degree.
Author(s): Jozef Martinka
Series: SpringerBriefs in Fire
Publisher: Springer
Year: 2022
Language: English
Pages: 117
City: Cham
Preface
Summary
Introduction
Contents
About the Author
Nomenclature
1 Description and the Parameters of Electrical Cables
1.1 Types of Electrical Cables
1.2 Main Parameters of Electrical Cables
1.3 Materials for Electrical Cables
1.3.1 Materials for Electrical Conductors
1.3.2 Polymeric Materials for Electrical Cables
References
2 Fault Scenarios of Electrical Cables
2.1 Current Flow in Electrical Cables
2.1.1 Skin Effect
2.1.2 Proximity Effect
2.1.3 Equivalent Circuit Diagram of Electrical Cable
2.1.4 Voltage Drop
2.1.5 Insulation Resistance
2.1.6 Joule Heating
2.2 Fault Scenarios
2.2.1 Short Circuit
2.2.2 Overload
2.2.3 Increased Contact Resistance
2.2.4 Electric Arc
2.2.5 Power Supply of Critical Devices
References
3 Traditional Approach to Assessment of Fire Hazards of Electrical Cables
3.1 Fire Scenarios
3.1.1 Fire Scenarios for Construction Products
3.1.2 Fire Scenarios for Electrical Cables
3.2 Reaction to Fire Class of Electrical Cables
3.3 Circuit Integrity
References
4 New Approach to Assessment of Fire Hazards of Electrical Cables
4.1 Fire Scenarios for New Approach
4.2 Fire Hazard of Electrical Cables
4.2.1 Ignition Parameters of Electrical Cables
4.2.2 Impact of Cable Fire on Surrounding Area
4.2.3 Impact of Fire on Polymer Components of Cables and Subsequent Impact on Insulation Resistance
4.2.4 Impact of Fire on Ability of Cable to Power Critical Device
References
Conclusion