IEC 60364-7-704:2017

FOREWORD
INTRODUCTION
704 Construction and demolition site installations
704.1 Scope
704.2 Normative references
704.3 Terms and definitions
704.30 Assessment of general characteristics
704.31 Purposes, supplies and structure
704.313 Supplies
704.4 Protection for safety
704.41 Protection against electric shock
704.410 Introduction
704.411 Protective measure: automatic disconnection
of supply
704.414 Protective measure: Extra-low voltage provided
by SELV and PELV
704.44 Protection against voltage disturbances and
electromagnetic disturbances
704.443 Protection against transient overvoltages of
atmospheric origin or due to switching
704.5 Select ion and erection of equipment
704.51 Common rules
704.511 Compliance with standards
704.512 Operational conditions and external influences
704.52 Wiring systems
704.53 Isolation, switching and control
704.536 Isolation and switching
704.56 Safety services
704.6 Verification
Annex A (informative) - List of notes concerning certain
        countries
Bibliography

IEC 60364-7-7-704:2017 lays down requirements which apply to installations for construction and demolition sites for use during the period of the construction or demolition work which are intended to be taken out of service upon completion of the works. Examples include the following:
- construction work of new buildings;
- repair, alteration, extension or demolition of existing buildings or parts of existing buildings;
- engineering works;
- earthworks;
- work of similar nature. The requirements apply to fixed or moveable installations. This new edition includes the following significant technical changes with respect to the previous edition:
- clarification of the scope;
- clarification of compliance with standards;
- clarification of devices for isolation.