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PREVIOUS | TABLE OF CONTENTS | NEXT 12. Construction of Cables12.1 Electrical cables and flexible cords for lighting, power, propulsion and communication circuits for marine installations shall be constructed and tested by a certifying authority to one of the most recent editions of the following standards: IEEE Std 45-1998 Recommended Practice for Electric Installations on Shipboard IEC 60092-3 Part 3 Cables (Construction and Testing and Installation) IEC 60092-350 Low Voltage Shipboard Power Cables 0 to 0.6 kV IEC 60092-351 Insulating Materials for Shipboard Power Cables IEC 60092-353 Single and Multi Power Cables Extruded Solid Insulation 0.6, 1 kV IEC 60092-354 Single and Three Conductor Power Cables Extruded Solid Insulation 0.6, 1 kV 6kV, 10kV & 15kV IEC 60092-376 Multi Cores UL 1309/CSA C22.2 No. 245 Marine Shipboard Cables C22.1 Canadian Electrical Code Part 1 (Flexible Cables and Cords) 12.2 Cables and flexible cords for lighting, power, propulsion and communication circuits in marine installations shall have stranded copper conductors and, where necessary for compatibility with the insulation shall be tinned or alloy-coated. 12.3 Marine cables shall be of the "flame-retardant" type, except for final circuits where installed in metallic conduit; the "flame-retardant" tests shall be conducted in accordance with the most recent edition of :
12.5 All marine cables shall have a impervious non-metallic jacket, which shall be compatible with the insulation and; be in accordance with subsections 12.3 and 12.6; if an armour is provided it shall be a basket weave bronze braid type; other materials for the armour may be aluminum alloy, galvanized wire, or tinned coated copper.. 12.6 The use of a protective covering of steel wire armour, steel tape armour, metal braid armour marine cables for use in circuits where the nominal voltage exceeds 1000 volts, shall be optional only where cable is not installed in hazardous locations. 12.7 In addition to subsection 12.1 marine cables for power, propulsion, lighting and control shall include a low temperature performance rating measured by impact at -35°C and bending tests at -40°C in accordance with the most recent C.S.A. Standard C22.2 number 0.3. 12.8 Marine cables shall be provided with a durable printing or embossing on the jacket or a marker under the cable jacket in accordance with IEEE Standard 45 1998 Clause 8.8, UL1309/CSA C22.2 No 245 Clause 5, or IEC 92-3. 12.9 The current carrying capacities of the various marine cable types shall be in accordance with the following:
12.11 Fiber Optic cables shall be flame retardant type with tests conducted in accordance with subsection (3), where this is not possible installation shall be in accordance with Section 13.44. 12.12 The construction of fiber optic cable which may pass through or enter a hazardous zone shall be such that escape of gases to a safe area is not possible through the cable. 12.13 Conductor colour coding shall be identified by either coloured conductor insulation, tapes or by printing the colour nomenclature on the insulation or covering; coloured conductors of distribution systems shall be identified by the following; three conductors black, white or blue, red four conductors black, white or blue, red, orange, or green *; * If a conductor is being used as a grounding conductor(normally not a current carrying conductor) in a distribution system it must be coloured green. 12.13.1 The use of a numbering system printed on the insulation would be an acceptable alternative to colour coding provided the ground conductor is identified as above. 12.14 Portable cables employed on travelling cranes and similar installations shall be C.S.A. certified extra hard usage in accordance with Table 11 of CSA 22.2 Part 1. 12.15 Branch circuit feeders shall not have conductors less than AWG #14 (1.5 mm²) wire. 12.16 Where the allowable current carrying capacity of the conductor does not correspond with a standard rating or setting of fuses or circuit breakers the next higher rating or setting may be selected provided it does not exceed 150 % of the allowable current carrying capacity of the conductor and the ambient operating temperature differs from 45° C, Table 12-1 (5) shall be considered with the exception of section 10.3 steering gear circuits and branch circuits section 11.25. 12.17 The cross sectional area of conductors shall be not less than the following:
TABLE 12-1 Maximum Current Carrying Capacity for Insulated Copper Wires and Cables (Single or Double Banked) Values in amperes 45°C Ambient 750 Volts or Less (AC or DC)
NOTES
A maximum conductor temperature of 250°C is permissible for special applications and standard end fittings may be used provided the temperature does not exceed 85° C at the end fittings, however, when the temperature at the end fitting is higher than 85° C special consideration will be given to an appropriate end fitting. |
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