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NORSOK STANDARD
E-001
Edition 5, July 2007
Electrical systems
This NORSOK standard is developed with broad petroleum industry participation by interested parties in the
Norwegian petroleum industry and is owned by the Norwegian petroleum industry represented by The Norwegian
Oil Industry Association (OLF), The Federation of Norwegian Industry, Norwegian Shipowners’ Association and
The Petroleum Safety Authority Norway. Please note that whilst every effort has been made to ensure the accuracy
of this NORSOK standard, neither OLF nor The Federation of Norwegian Industry or any of their members will
assume liability for any use thereof. Standards Norway is responsible for the administration and publication of this
NORSOK standard.
Standards Norway
Strandveien 18, P.O. Box 242
N-1326 Lysaker
NORWAY
Copyrights reserved
Telephone: + 47 67 83 86 00
Fax: + 47 67 83 86 01
Email: petroleum@standard.no
Website: www.standard.no/petroleum
NORSOK standard E-001
Edition 5, July 2007
Foreword
Introduction
1
2
2.1
2.2
3
3.1
3.2
4
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
4.10
4.11
4.12
4.13
4.14
5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
6
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.13
6.14
7
8
9
9.1
9.2
9.3
Scope
Normative and informative references
Normative references
Informative references
Terms, definitions and abbreviations
Terms and definitions
Abbreviations
General requirements and conditions (see IEC 61892-1)
General (see IEC 61892-1, 4.1)
Acceptance of substitutes or alternatives (see IEC 61892-1, 4.4)
Environmental conditions (see IEC 61892-1, 4.7)
Materials
Power supply system characteristics (see IEC 61892-1, 4.9)
Clearance and creepage distances (see IEC 61892-1, 4.12)
Insulation (see IEC 61892-1, 4.13)
Maintenance and inspection (see IEC 61892-1, 4.14)
Cable entries (see IEC 61892-1, 4.15)
Location of electrical equipment in units (see IEC 61892-1, 4.17)
Spaces and compartments (see IEC 61892-1, 4.18)
Spare requirements for future modifications
Mechanical protection (see IEC 61892-1, 4.19)
Protection from heat, water, steam and oil (see IEC 61892-1, 4.20)
System design (see IEC 61892-2)
Sources of electrical power (see IEC 61892-2, Clause 4)
System earthing (see IEC 61892-2, Clause 5)
Distribution systems (see IEC 61892-2, Clause 6)
Distribution system requirements (see IEC 61892-2, Clause 7)
Diversity (demand) factors (see IEC 61892-2, Clause 8)
System study and calculations (see IEC 61892-2, Clause 9)
Protection (see IEC 61892-2, Clause 10)
Lighting (see IEC 61892,2, Clause 11)
Control and instrumentation (see IEC 61892-2, Clause 12)
Degrees of protection by enclosures (see IEC 61892-2, Clause 13)
Equipment (see IEC 61892-3)
General
Generators and motors (see IEC 61892-3, Clause 4)
Transformers for power and lighting (see IEC 61892-3, Clause 5)
Switchgear and control gear assemblies (see IEC 61892-3, Clause 6)
Electrical indicating instruments
Semiconductor converters (see IEC 61892-3, Clause 7)
Secondary cells and batteries (UPS) (see IEC 61892-3, Clause 7 and Clause 8)
Luminaires (see IEC 61892-3, Clause 9)
Heating and cooking appliances (see IEC 61892-3, Clause 10)
Trace and surface heating (see IEC 61892-3, Clause 11)
Communication (see IEC 61892-3, Clause 12)
Underwater systems and appliances (see IEC 61892-3, Clause 13)
Control and instrumentation (see IEC 61892-3, Clause 14)
Accessories (see IEC 61892-3, Clause 15)
Cables (see IEC 61892-4)
Mobile units (see IEC 61892-5)
Installation (see IEC 61892-6)
Equipment earthing and bonding (see IEC 61892-6, Clause 4)
Cables and wiring (see IEC 61892-6, Clause 5)
Generators and motors (see IEC 61892-6, Clause 6)
3
3
4
4
4
6
6
6
6
7
7
7
7
7
7
7
8
8
8
8
9
9
9
9
9
9
13
14
15
16
16
18
21
22
22
23
23
23
26
27
29
30
35
36
36
36
37
37
37
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38
38
38
38
39
43
Page 1 of 112
NORSOK standard
NORSOK standard E-001
9.4
9.5
9.6
9.7
9.8
9.9
9.10
9.11
9.12
9.13
10
10.1
10.2
10.3
10.4
Transformers (see IEC 61892-6, Clause 7)
Switchgear and control gear assemblies (see IEC 61892-6, Clause 8)
Secondary cells and batteries (see IEC 61892-6, Clause 10)
Luminaires (see IEC 61892-6, Clause 11)
Trace and surface heating (see IEC 61892-6, Clause 13)
Lightning protection (see IEC 61892-6, Clause 16)
Test of completed installation (see IEC 61892-6, Clause 17)
Documentation (see IEC 61892-6, Clause 18)
Marking and labelling
Bulk materials
Hazardous areas (see IEC 61892-7)
Electrical systems (see IEC 61892-7, Clause 4 and Clause 5)
Electrical equipment (see IEC 61892-7, Clause 6)
Installation (see IEC 61892-7, Clause 7)
Documentation (see IEC 61892-7, Clause 10)
Edition 5, July 2007
43
44
44
44
44
44
45
45
45
46
47
47
48
48
48
49
101
109
Annex A (Normative) Data sheets
Annex B (Informative) Typical installation drawings
Bibliography
NORSOK standard
Page 2 of 112
NORSOK standard E-001
Edition 5, July 2007
Foreword
The NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety,
value adding and cost effectiveness for petroleum industry developments and operations. Furthermore,
NORSOK standards are, as far as possible, intended to replace oil company specifications and serve as
references in the authorities’ regulations.
The NORSOK standards are normally based on recognised international standards, adding the provisions
deemed necessary to fill the broad needs of the Norwegian petroleum industry. Where relevant, NORSOK
standards will be used to provide the Norwegian industry input to the international standardisation process.
Subject to development and publication of international standards, the relevant NORSOK standard will be
withdrawn.
The NORSOK standards are developed according to the consensus principle generally applicable for most
standards work and according to established procedures defined in NORSOK A-001.
The NORSOK standards are prepared and published with support by The Norwegian Oil Industry Association
(OLF), The Federation of Norwegian Industry, Norwegian Shipowners’ Association and The Petroleum Safety
Authority Norway.
NORSOK standards are administered and published by Standards Norway.
Annex A is normative.
Introduction
This NORSOK standard is based on equipment and practices which are in current use, but it is not intended
in any way to impede development of new or improved techniques.
Each clause in this NORSOK standard refers to the equivalent clause in the IEC 61892, Edition 1, series of
standards.
NORSOK standard
Page 3 of 112

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