IEC 61892-4:2007

INTERNATIONAL IEC
STANDARD 61892-4
First edition
2007-06
Mobile and fixed offshore units –
Electrical installations –
Part 4:
Cables
Reference number
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INTERNATIONAL IEC
STANDARD 61892-4
First edition
2007-06
Mobile and fixed offshore units –
Electrical installations –
Part 4:
Cables
PRICE CODE
Commission Electrotechnique Internationale X
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
For price, see current catalogue

– 2 – 61892-4 © IEC:2007(E)
CONTENTS
FOREWORD.4

INTRODUCTION.6

1 Scope.7

2 Normative references .7

3 Terms and definitions .8

4 Types, installation and operating conditions of cables .10

4.1 Types of cables .10
4.2 Voltage rating.10
4.2.1 Power frequency cables .10
4.2.2 Control and instrumentation cables.11
4.3 Cross-sectional areas of conductors and current-carrying capacities .11
4.3.1 Cross-sectional areas of conductors .11
4.3.2 Current-carrying capacities.13
4.3.3 Current-carrying capacities for continuous service.13
4.3.4 Correction factors for different ambient air temperatures .17
4.3.5 Correction factors for short time duty.18
4.3.6 Correction factors for cable grouping .21
4.4 Voltage drop.22
4.5 Estimation of lighting loads.22
4.6 Parallel connection of cables.22
4.7 Separation of circuits.22
4.8 Short circuit capacity (withstand capability). .22
4.9 Conductor .22
4.10 Insulation material.23
4.11 Screen, core screen or shield .23
4.12 Sheathing material .23
4.13 Metallic braid armour.23
4.14 Fire performance.23
4.15 Bending radius .24

Annex A (informative) Tabulated current-carrying capacities – Defined installations .26

Annex B (Informative) Fire stops.40
Annex C (Informative) Jet fire test for hydrocarbon (HCF) fire resistant cables .41
Annex D (Informative) Drilling fluid test procedure and requirements .42

Bibliography.

Table 1 – Choice of cables for a.c. systems .11
∗
Table 2 – Sizes of earth continuity conductors and equipment earthing connections.13
Table 3 – Coefficient related to maximum permissible temperature of the conductor.14
Table 4 – Current-carrying capacities in continuous service at maximum rated
conductor temperature of 70 °C (ambient air temperature 45 °C) .15

61892-4 © IEC:2007(E) – 3 –
Table 5 – Current-carrying capacities in continuous service at maximum rated

conductor temperature of 90 °C (ambient air temperature 45 °C) .16

Table 6 – Current-carrying capacities in continuous service at maximum rated

conductor temperature of 95 °C (ambient air temperature 45 °C) .17

Table 7 – Correction factor for various ambient air temperatures (reference ambient
temperature of 45 °C) .18

Table 8 – Correction factor for various ambient air temperatures (reference ambient

temperature of 30 °C) .18

Table 9 – Bending radii for cables rated up to 1,8/3 kV .25

Table 10 – Bending radii for cables rated at 3,6/6,0(7,2) kV and above.25

Table A.1 – Current-carrying capacities in amperes – Copper conductor temperature
60 °C and reference ambient air temperature 45 °C .29
Table A.2 – Current-carrying capacities in amperes – Copper conductor temperature
70 °C and reference ambient air temperature 45 °C .30
Table A.3 – Current-carrying capacities in amperes – Copper conductor temperature
85 °C and reference ambient air temperature 45 °C .31
Table A.4 – Current-carrying capacities in amperes – Copper conductor temperature
60 °C and reference ambient air temperature 30 °C .32
Table A.5 – Current-carrying capacities in amperes – Copper conductors temperature
70 °C and reference ambient temperature 30 °C .33
Table A.6 – Current-carrying capacities in amperes – Copper conductors temperature
85 °C and reference ambient temperature 30 °C .34
Table A.7 – Current-carrying capacities in amperes – Copper conductors temperature
90 °C and reference ambient temperature 45 °C .35
Table A.8 – Current-carrying capacities in amperes – Copper conductors temperature
95 °C and reference ambient temperature 45 °C .36
Table A.9 – Correction factors for groups of more than one circuit or of more than one
multi-core cable to be used with current-carrying capacities of Tables A.1 to A.8.37
Table A.10 – Correction factors for group of more than one multi-core cable to be
applied to reference ratings for multi-core cables in free air – Method of installation E
in Tables A.1 to A.8 .38
Table A.11 – Correction factors for groups of more than one circuit of single-core
cables to be applied to reference rating for one circuit of single-core cables in free air
– Method of installation F in Tables A.1 to A.8 .39

Figure 1 – Time constant of cables .19
Figure 2 – Correction factors for half-hour and one-hour service.20
Figure 3 – Correction factor for intermittent service.21
Figure C.1 – International recognized HC fire curve .41

– 4 – 61892-4 © IEC:2007(E)
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
MOBILE AND FIXED OFFSHORE UNITS –

ELECTRICAL INSTALLATIONS –
Part 4: Cables
FOREWORD
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International Standard IEC 61892-4 has been prepared by IEC technical committee 18:
Electrical installations of ships and of mobile and fixed offshore units, in cooperation with
SC 18A: Cables and cable installations.
The text of this standard is based on the following documents:
FDIS Report on voting
18/1052/FDIS 18/1058/RVD
Full information on the voting for the app
...