AS/NZS 3003:2003

1 - AS/NZS 3003:2003 ELECTRICAL INSTALLATIONS - PATIENT AREAS OF HOSPITALS, MEDICAL AND DENTAL PRACTICES AND DIALYZING LOCATIONS
4 - PREFACE
6 - CONTENTS
9 - 1 SCOPE AND GENERAL
9 - 1.1 Scope
9 - 1.2 Application
10 - 1.3 Referenced documents
11 - 1.4 Definitions
11 - 1.4.1 Applied part,Type B
12 - 1.4.2 Body-protected electrical area
12 - 1.4.3 Body-type procedure
12 - 1.4.4 Cardiac-protected electrical area
13 - 1.4.5 Cardiac-type procedure
13 - 1.4.6 Class I equipment
13 - 1.4.7 Class II equipment
13 - 1.4.8 Class III equipment
13 - 1.4.9 Equipotential (EP)junction
13 - 1.4.10 Equipotential (EP)terminal
14 - 1.4.11 Leakage protective device (LPD)
14 - 1.4.12 Line isolation monitor (LIM)
14 - 1.4.13 Medical electrical equipment
14 - 1.4.14 Overload monitor
14 - 1.4.15 Patient
14 - 1.4.16 Patient area
15 - 1.4.17 Patient environment
15 - 1.4.18 Patient location
16 - 1.4.19 Prospective hazard current
16 - 1.4.20 Return earth
16 - 1.4.21 Supply,essential (essential supply)
16 - 1.4.22 Supply,normal (normal supply)
16 - 1.4.23 Supply,uninterruptible (uninterruptible supply or UPS)
16 - 1.4.24 Transformer-isolated supply
17 - 2 GENERAL REQUIREMENTS FOR BODY-PROTECTED AND CARDIAC- PROTECTED ELECTRICAL AREAS
17 - 2.1 General
17 - 2.2 Supply of electricity to patient areas – New Zealand only
17 - 2.3 Low-voltage a.c.supplies
17 - 2.3.1 Protection of wiring systems against mechanical damage
17 - 2.3.2 LPD protection required
18 - 2.3.3 LPD protection not required
18 - 2.3.4 Low-voltage uninterruptible supplies (UPS)
19 - 2.4 Low-voltage d.c.supplies
20 - 2.5 Access to controls and indicators
20 - 2.6 Low-voltage socket-outlets
20 - 2.6.1 Number of socket-outlets
20 - 2.6.2 Marking and protection of socket-outlets for cleaning purposes
20 - 2.6.3 Marking and identification of socket-outlets
21 - 2.6.4 Type of socket-outlet
21 - 2.7 Residual current devices (RCDs)
21 - 2.7.1 General
22 - 2.7.2 Number of poles
22 - 2.7.3 Number and disposition of points controlled by RCDs
22 - 2.7.4 Indication
22 - 2.7.5 Marking
22 - 2.7.6 Permanently-wired equipment
23 - 2.8 Low-voltage isolated supplies
23 - 2.8.1 General
23 - 2.8.2 Isolation transformers
23 - 2.8.3 Overload monitor
23 - 2.8.4 Line isolation monitor
23 - 2.8.5 Overcurrent circuit-breaker
24 - 2.8.6 System prospective hazard current
24 - 2.8.7 Number of socket-outlets
24 - 2.8.8 Permanently-wired equipment
24 - 2.9 Isolation switches
25 - 2.10 Marking
25 - 2.10.1 General
25 - 2.10.2 Marking of patient areas
25 - 2.11 Commissioning
25 - 2.12 Inspection and documentation – New Zealand only
26 - 3 ADDITIONAL REQUIREMENTS FOR BODY-PROTECTED ELECTRICAL AREAS
26 - 3.1 General
26 - 3.2 Earthing
26 - 3.3 Home dialysis installations
27 - 4 ADDITIONAL REQUIREMENTS FOR CARDIAC-PROTECTED ELECTRICAL AREAS
27 - 4.1 General
27 - 4.2 Extra-low-voltage supplies
27 - 4.2.1 General
27 - 4.2.2 Source of extra-low-voltage supply
27 - 4.2.3 Earth-free
27 - 4.2.4 Batteries
27 - 4.3 Disposition of points controlled by RCDs
27 - 4.4 Earthing and equipotential bonding
27 - 4.4.1 General
28 - 4.4.2 Equipotential earthing system
31 - 4.4.3 Return earths
31 - 4.4.4 Equipotential terminal (EP terminal)
37 - APPENDIX A - RATIONALE FOR THE REQUIREMENTS OF THIS STANDARD
37 - A1 Section 1 – General and scope
37 - A2 Section 2 – General requirements for patient areas
37 - A2.1 General
37 - A2.2 Electricity supply
37 - A2.3 and A2.4 LPD protection and supply wiring
37 - A2.5 Access to protective devices
38 - A2.6 Socket-outlets
38 - A2.7 Residual current devices (RCD)
39 - A2.8 Low-voltage isolated supplies
40 - A2.9 Isolation switches
40 - A2.10 Marking
40 - A2.11 Commissioning
40 - A3 Section 3 –Additional requirements for body-protected electrical areas
40 - A3.1 General
40 - A3.2 Earthing
40 - A3.3 Home dialysis installations
40 - A4 Section 4 –Additional requirements for cardiac-protected electrical areas
40 - A4.1 General
40 - A4.2 Extra-low-voltage supplies
41 - A4.3 Disposition of points controlled by RCDs
41 - A4.4 Earthing
42 - APPENDIX B - PLANNING OF AREAS
42 - B1 Choosing RCD-protected or isolation-protected supply systems
42 - B1.1 General
42 - B1.2 Summary
43 - B2 Deciding on the number and disposition of final subcircuits
43 - B2.1 Socket-outlets
43 - B2.2 Number of protective devices
44 - APPENDIX C - MARKING OF PATIENT AREAS
44 - C1 General
44 - C2 Body-protected electrical area sign
44 - C3 Cardiac-protected electrical area sign
45 - APPENDIX D - COMMISSIONING FOR PATIENT AREAS
45 - D1 Commissioning inspection check list
51 - D2 Testing
51 - D3 Documentation
52 - APPENDIX E - SAMPLE RECORDING FORMS
56 - APPENDIX F - MEASURES FOR AVOIDING INTERFERENCE FROM MAGNETIC FIELDS
56 - F1 General
56 - F2 Location of equipment
56 - F3 Underfloor heating
57 - APPENDIX G - METHOD FOR MEASURING MAGNETIC FIELDS
59 - APPENDIX H - INSTRUMENT FOR MEASURING POTENTIAL DIFFERENCES IN AN INSTALLATION
61 - APPENDIX I - CALCULATIONS FOR EQUIPOTENTIAL EARTHING
61 - I1 Requirements of the Standard
61 - I2 Examples of resistance calculations
61 - I2.1 General
61 - I2.2 Equipotential earthing system
61 - I2.3 Connections to the EP junction
63 - APPENDIX J - ALTERATIONS TO EQUIPOTENTIAL EARTHING SYSTEMS IN EXISTING INSTALLATIONS
63 - J1 General
63 - J2
64 - J3

Specifies requirements, in addition to those AS/NZS 3000 for electrical installations in hospitals and medical and dental practices where electromedical procedures are performed on a regular basis. In addition, specifies requirements for cardiac-protected and body-protected electrical areas. Included in the appendices are typical forms for commissioning tests for patient areas, methods of measuring magnetic fields and resistance calculations in equipotential areas.

This Standard sets out requirements for electrical installations in PATIENT AREAS of hospitals, medical and dental practices, and dialyzing locations.Areas other than PATIENT AREAS are not covered by this Standard, but are covered by the relevantrequirements of AS/NZS 3000.NOTES –(1)Attention is drawn to AS/NZS 2500,which outlines the procedure for determining whereCARDIAC-PROTECTED ELECTRICAL AREAS are required. These decisions are made by the governingbody or proprietor of the health care facility, based on the classification of the medicalprocedures undertaken in each area and the protection against electric shock provided inthe MEDICAL ELECTRICAL EQUIPMENT available for these procedures.(2)A rationale for the requirements of this Standard is given in Appendix A.(3)Requirements for mobile trolleys supporting electrical equipment are given inAS/NZS 3200.1.1 and AS/NZS 4510.(4)Requirements for emergency lighting are given in AS/NZS 2293.1.(5)Requirements for emergency power systems in hospitals are given in AS/NZS 3009.

First published as part of AS 3003-1976.
Second edition 1985.
Jointly revised and redesignated in part as AS/NZS 3003:1999.
Gourth edition 2003.