Guide to Electrical Installations in Medical Locations Edition 2017 (PDF)

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About the book

First published 2017
Pages: 219
Publisher: IET
Language: English;
Size: 136 Mb;
ISBN: 9781849197687

Content

About the author
Acknowledgments
Foreword
Chapter 1 Introduction
Special location information
Who is Section 710 applicable to?
What type of installations does Section 710 cover?
What is not covered by Section 71O?
Background to Section 710
History
International Standards
Harmonization
HD 60364-7-710
Longevity of information
International specifications
Reading material
Chapter 2 Related reading
Definitions from Part 2 of BS 7671
Other terms not defined in Part 2 of BS 7671
Associated regulations
BS 7671 and compliance with the Electricity at Work Regulations
Chapter 3 Assessment of medical locations
Understanding the medical procedures
Determining the group rating
Over-specification
Under-specification
Specifications where the client does not require all elements
Chapter 4 Risk assessment
Variations to BS 7671
Common understanding
Chapter 5 Review of existing locations
Common causes of confusion when assessing a medical location
HTM 06-01 risk profiling
Assessment of risk: summary
Chapter 6 Risks to patients: shock
Development of appropriate thresholds
Leakage current: background
Normal equipment example
Medical electrical equipment (ME equipment)
Types of applied parts
Protective conductor current
Equipment type: summary
Chapter 7 Patient environment
Chapter 8 Risks to patients: lack of resilience
Resilience
Single point of failure
System selection
Chapter 9 Fire survival
Escape is not always the option
Application of fire survival considerations
Medical IT system supplies
Chapter 10 Comparison of the BS 7671 approach with HTM methodology
Tertiary power supplies (TPS)
Uninterruptable power supplies (UPS)
Safe approach to tertiary supplies
Tertiary supply resilience
UPS fault levels and supply impedance
Improving the resilience of IT systems
Chapter 11 Safety integration level (SIL) rating
SIL certification
Enhancement of standard automatic transfer
Chapter 12 Theatre operating lights
Chapter 13 Generator supplies
Generator ratings
Chapter 14 Equipotential bonding: medical locations
Simultaneously accessible exposed-conductive-parts
Additional protection: supplementary equipotential
Changing the terminology
Supplementary equipotential bonding in Group 2 medical locations
Other configurations
Supplementary equipotential bonding connection points
Chapter 15 Medical location lighting
Safety lighting
Chapter 16 Defining a medical location
Chapter 17 Group 0 design considerations
Chapter 18 Group I design considerations
Maximum disconnection times
Supplementary equipotential bonding: Group 1 medical locations
Use of RCDS
Operation of RCDs
Difficult to define locations
Chapter 19 Other types of medical care
Mental health units
Hemodialysis
Potential hazard
Unrealistic expectations
Chapter 20 Group 2 design considerations
Prevention of loss of supply
Use of RCDs
Supplementary equipotential bonding: Group 2 medical locations
Medical IT systems
Alarm annunciator
Medical IT system transformers
Insulation fault location systems (Earth fault detection systems)
Final circuits
TN circuits from medical IT cabinets
Medical IT socket-outlets
Isolated earth pin socket-outlets
Number of socket-outlets per final circuit
What is the maximum length of run of an IT circuit?
Can I only use 20 A type B MoBs on medical IT systems?
Do we need to provide TN socket-outlets in a Group 2 medical location?
Surgeon's control panels (SCPs)
Chapter 21 Inspection and testing
General requirements
Initial inspection and testing of medical locations
Periodic inspection and testing
Colour of IT circuit conductors
Testing ME equipment
Chapter 22 Imaging and diagnostics
General
Imaging-mains supply impedance
Interventional X-ray systems and UPS
Contactor control circuits
Illuminated warning signs
Chapter 23 Mobile medical locations
Appendix I Information supporting medical location assessment
Appendix 2 Common myths about medical locations
A2.1 Myth ii the purpose of an IPS is to protect the patient from
'microshocks'
A2.2 yth 2: medical locations should be single phase
A2.3 Myth 3: TN-C-S arrangements cannot be used in medical locations
A2.4 Myth 4: Group 2 medical locations touch voltages should be less than 10
A2.5 Myth 5: Sensor taps in Group 2 medical locations
Appendix 3 Generator fault levels
A31 Generator fault levels
Appendix 4 Supplementary information
A4.1 Extracts From Annex A of BS EN 60601-1:2006 + A1:2013
Appendix 5 Example risk assessment
Appendix 6 Typical medical IT system loads
A6.1 Typical medical IT system loadings
Appendix 7 Thermal effects on circuit-breakers
Appendix 8 Effects of inrush current
Appendix 9 Group 2 handover checklist
Appendix 10 Medical location supplementary test sheet
Appendix 11 Recommended frequencies for inspection and testing
A11.1 Regulation 622.11 frequency of periodic inspections
A11.2 Regulation 6222: alternative approach to periodic inspection
Index

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