The primary purpose of this handbook is to improve the safety of polyphase electrical systems and components by addressing the associated risks and hazards
and by offering solutions for eliminating or reducing them. Tofacilitate its use, the handbook is divided into two major parts:(1) general safety considerations presented in Chapters 2 and 3 and(2) design safety for
specific items of electrical equipment presented in Chapters 4 through 8. Furthermore, the chapters conform to the following standardized format to assist the reader: introduction, induced environment, hazards, design
considerations, compatibility and interoperability,test criteria for design and item acceptance, and operational precautions. The handbook content, although
broad, is sufficiently specific to satisfy the needs of the design engineer, safety. manager, safety engineer, and equipment user.This handbook was developed under the auspices of the Army Materiel Command's Engineering Design Handbook Program, which is under the direction of the US Army Management Engineering College.. The handbook was written by the Research Triangle Institute under Contract No. DAAA08-80-C-0247.