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PD IEC TS 63527:2025 Safe management and operation of electrical installations, 2025
- undefined
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1 General
- 3.2 Personnel, organization and communication
- 3.3 Working zone
- 3.4 Working
- 3.5 Protective devices
- 3.6 Voltages
- 3.7 Distances
- 3.8 Miscellaneous
- 3.9 Symbols
- 4 Basic principles [Go to Page]
- 4.1 Safe operation (3.1.2)
- 4.2 Personnel
- 4.3 Organization [Go to Page]
- 4.3.1 General
- 4.3.2 The installation manager (3.2.1)
- 4.3.3 The operation controller (3.2.2)
- 4.3.4 The work controller (3.2.3)
- 4.3.5 The worker (3.2.4)
- 4.3.6 Skilled person in electricity
- 4.3.7 Instructed person in electricity
- 4.3.8 Ordinary person (3.2.7) in electricity
- 4.3.9 Complexity of work activity (3.4.1)
- 4.3.10 Objections for safety
- 4.4 Communication (transmission of information)
- 4.5 Work location
- 4.6 Tools, equipment and devices
- 4.7 Drawings and records
- 4.8 Signs
- 4.9 Emergency arrangements
- 4.10 Types of supervision (3.4.11)
- 4.11 Determination of distances [Go to Page]
- 4.11.1 General
- 4.11.2 Limit distances
- Figures [Go to Page]
- Figure 1 – Distances in air and zones
- Figure 2 – Example of eliminating limit zones by the use of an insulating protective device
- Figure 3 – Example of eliminating limit zones by the use of a barrier (3.5.2) (insulating or non-insulating) [Go to Page]
- 4.11.3 Determination of working distances
- 4.12 Assessment of competence (3.8.2) and authorization (3.4.9) of persons
- Tables [Go to Page]
- Table 1 – Estimated values for distances DL and DV
- 4.13 Planning the work
- 4.14 Electrical safety rules (3.2.9)
- 5 Operational procedures [Go to Page]
- 5.1 General
- 5.2 Operating activities
- 5.3 Measurement
- 5.4 Testing
- 5.5 Inspection
- 6 Working procedures [Go to Page]
- 6.1 General [Go to Page]
- 6.1.1 General requirements
- Figure 4 – Flowchart "planning working procedure" [Go to Page]
- 6.1.2 Specific requirements in case of induction
- 6.1.3 Specific requirements according to weather conditions
- 6.2 Dead working (3.4.8) [Go to Page]
- 6.2.1 General
- 6.2.2 Disconnect completely
- 6.2.3 Secure against re-connection
- 6.2.4 Verify absence of operating voltage (3.6.4)
- 6.2.5 Earthing and short-circuiting
- 6.2.6 Protection against adjacent live parts
- 6.2.7 Permission to start work (3.4.10)
- 6.2.8 Re-energizing after work
- 6.3 Live working (3.4.4) [Go to Page]
- 6.3.1 General
- 6.3.2 Training and qualification
- 6.3.3 Maintenance of personnel ability
- 6.3.4 Working methods
- 6.3.5 Working instructions
- 6.3.6 Tools, equipment and devices
- 6.3.7 Environmental conditions
- 6.3.8 Organization of work
- 6.3.9 Specific requirements for extra-low voltage installations
- 6.3.10 Specific requirements for low voltage installations
- 6.3.11 Specific requirements for high voltage installations
- 6.3.12 Specific works on live parts
- 6.4 Working within the vicinity zone (3.4.5) [Go to Page]
- 6.4.1 General
- 6.4.2 Protection by screen (3.5.1), barrier (3.5.2), enclosure (3.5.4) or protective cover (3.5.3)
- 6.4.3 Protection by safe distance and supervision (3.4.11)
- 6.5 Working outside the vicinity zone (3.3.3) [Go to Page]
- 6.5.1 General
- 6.5.2 Specific requirements for non-electrical work (3.4.3), e.g. construction work, and electrical work (3.4.2)
- 7 Maintenance procedures [Go to Page]
- 7.1 General
- 7.2 Personnel
- 7.3 Repair work
- 7.4 Replacement work [Go to Page]
- 7.4.1 Replacement of fuses
- 7.4.2 Replacement of lamps and accessories
- 7.5 Temporary interruption of maintenance work
- 7.6 End of maintenance work
- Annex A (informative) Guidance for distances in air for working procedures [Go to Page]
- A.1 Limit distances
- A.2 Working distances [Go to Page]
- A.2.1 General
- A.2.2 Determination of the distance value related to the voltage level
- A.2.3 Considerations of tools, devices or equipment
- A.2.4 Ergonomic considerations
- A.2.5 Working distance for live working
- A.2.6 Working distance for working within the vicinity zone
- A.2.7 Working distance for working outside the vicinity zone
- Figure A.1 – Example for determination of the minimum working distance for working within the vicinity zone (3.4.5)
- Figure A.2 – Example for determination of the minimum working distance for working outside the vicinity zone (3.3.3)
- Annex B (informative) Additional information for safe working [Go to Page]
- B.1 Example for responsibility levels [Go to Page]
- B.1.1 General scheme
- B.1.2 Domestic
- Figure B.1 – Responsibility levels [Go to Page]
- B.1.3 Small company or craftsman
- B.1.4 Large or Industrial company
- B.2 Example of application of live working
- B.3 Atmospheric conditions that are part of environmental conditions to be assessed [Go to Page]
- B.3.1 Precipitation
- B.3.2 Thick fog
- B.3.3 Thunderstorms
- B.3.4 Violent wind
- B.3.5 Salt storms
- B.3.6 Extra low temperature
- B.4 Fire protection and fire fighting
- B.5 Work location presenting explosion risks
- B.6 Emergency arrangements
- Annex C (informative) Hazards of electricity [Go to Page]
- C.1 Introduction
- C.2 Electric shock hazard
- C.3 Arc hazard [Go to Page]
- C.3.1 General
- Figure C.1 – Time and current zones for effects of alternating and direct current through human body
- Table C.1 – Summarized impacts of AC and DC current through human body (see Figure C.1) [Go to Page]
- C.3.2 Hazards
- C.3.3 Arc flash risk assessment
- C.4 Electromagnetic fields
- Annex D (informative) Risk assessment [Go to Page]
- D.1 General
- D.2 Principles of prevention
- D.3 Hierarchy of controls
- Figure D.1 – Hierarchy of risk controls: the most efficient way is to remove the hazard, and the least effective is using PPE
- D.4 Categories of risk assessment [Go to Page]
- D.4.1 General
- D.5 Design risk assessment [Go to Page]
- D.5.1 General
- D.5.2 Electrical installation risk assessment
- D.5.3 Work plan risk assessment
- D.5.4 Work location risk assessment
- D.5.5 Work start risk assessment
- D.5.6 Specific risk assessment
- D.6 Risk assessment formats [Go to Page]
- D.6.1 General
- D.6.2 As low as reasonably practicable (ALARP)
- Figure D.2 – A graphical tool for visualising the risk (3.1.3)
- Table D.1 – Risk classification for personal injuries
- Table D.2 – A matrix for assessing design risk with ALARP [Go to Page]
- D.6.3 Consequence/likelihood matrix (risk matrix or heat map)
- Figure D.3 – Example of consequence/likelihood matrix (IEC 31010 [15])
- Annex E (informative) Safe system of work and safety documents [Go to Page]
- E.1 Safe system of work
- E.2 Safety documents for dead working (3.4.8) (6.2) [Go to Page]
- E.2.1 General
- E.2.2 Switching plan
- E.2.3 Request for dead working
- E.2.4 Authorization for dead working
- E.2.5 Definition of the work location
- E.2.6 Authorization for electrical test, measurement and verification
- E.2.7 Permission to start work
- E.2.8 Cancellation of permission to start work
- E.2.9 Notification of readiness to re-energize
- E.3 Safety documents for live working (3.4.4) (6.3) [Go to Page]
- E.3.1 General
- E.3.2 Request for live working
- E.3.3 Authorization for live working
- E.3.4 Definition of work location
- E.3.5 Authorization for equipment used if required
- E.3.6 Permission to start work
- E.4 Safety documents for working within the vicinity zone (3.3.3) (sub-clause 6.4) [Go to Page]
- E.4.1 General
- E.4.2 Switching plan (3.8.3) (if necessary)
- E.4.3 Request for working within the vicinity zone (3.3.3)
- E.4.4 Authorization for working within the vicinity zone (3.3.3)
- E.4.5 Definition of work location (3.3.1)
- E.4.6 Authorization for electrical test, measurement and verification (if necessary)
- E.4.7 Permission to start work
- E.4.8 Notification of readiness to re-energize (if necessary)
- E.5 Safety documents for working outside the vicinity zone (6.5)
- Annex F (informative) Terms and definitions in alphabetic order [Go to Page]
- F.1 General
- F.2 English
- Table F.1 – Terms in English
- F.3 French
- Table F.2 – Terms in French
- F.4 German
- Table F.3 – Terms in German
- Bibliography [Go to Page]
