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PREVIOUS | TABLE OF CONTENTS | NEXT 13. Installation of Cables13.1 All cables shall be so constructed, installed and protected as to prevent danger to the ship and personnel. 13.2 The rated voltage of any cable shall be not less than the maximum voltage of the circuit for which it is used. 13.3 Cables exposed to voltage surges associated with highly inductive circuits shall, as a minimum, be insulated for 600 volts. 13.4 Cables or flexible cords shall not be installed in any location where the maximum conductor temperature, under normal conditions, exceeds the appropriate value set forth in Table 12-1. 13.5 Polyvinyl chloride insulated cables shall not be used in refrigerated spaces unless special low temperature PVC suitable for 40°C is used. 13.6 Cables having a sheath or covering of polyvinyl chloride shall not be used in refrigerated spaces or in any situation where it is necessary for them to pass through watertight bulkhead glands or deck tubes, unless special low temperature PVC is used in refrigerated spaces and heat?resisting quality PVC is used through bulkheads or decks. 13.7 In machinery spaces and refrigerated spaces, or in wet or damp locations, cables shall, unless run in steel conduit or steel pipe, be:
13.9 All cables, other than travelling cables, installed for any purpose in an elevator shaft, shall, unless enclosed in rigid metal conduit, be:
13.11 Cables, unless adequately protected shall not be laid under machines or floor plates. 13.12 Cables shall not be led across expansion joints in the superstructure unless this is unavoidable; where cables must cross an expansion joint they shall be arranged with a loop suitably supported and having an internal radius not less than twelve times the overall diameter of the largest cable, to ensure the necessary flexibility. 13.13 All cables within 9 metres of any receiving antenna system, radio room or radio navigation apparatus, unless a metallic deck or bulkhead intervenes, shall be metal?sheathed, metal?braided or otherwise adequately screened, or arranged so as to prevent the radiation or reception of interfering spurious signals. 13.14 Cables, other than those feeding services in a radio room shall not be installed therein, but cables which must pass through a screened radio room shall be run throughout their length within the room, in continuous metallic conduit or trunking which shall be bonded to the screening of the room at the points of entry and exit. 13.15 All cables which must enter the radio room shall be grouped together, so far as is practicable, so that they enter at one point only and when the radio room is screened, the screening of the cables entering the room shall be bonded to the room screening at the point of entry. 13.16 All cables supplying the services to an unscreened radio room shall pass through suitable interference filters at the point of entry of the cables into the screened sections, unless they terminate in equipment which in itself provides adequate screening and suppression. 13.17 Cables carrying pulses of high amplitude, and power cables supplying units in which such pulses are present, shall be segregated from cables for other services. 13.18 Where a cable is bent, the internal radius of the bend shall be not less than the appropriate value set forth in Table 13-1. TABLE 13-1 Bending Radius of Cables
13.19 Portable cords or portable cables shall not be used for fixed wiring. 13.20 Cables terminating in equipment capable of generating high temperatures, such as lighting fixtures, electric heaters, etc. shall be suitable for operation at the temperature of the fixture without sustaining damage to the insulation. 13.21 With the exception of low voltage communications circuits, joints in all electrical conductors are to be made in junction or outlet boxes; the splicing of cables shall comply with the requirements of subsections 13.39, 13.40 and 13.41. 13.22 Connections and terminations shall comply with the following:
13.24 Where the weight of cables is independently supported by a metallic cable support system, the spacing of the cable clips or restraints may be increased to maximum of 1 metre. 13.25 Metallic staples shall not be used for fixing any cables. 13.26 Permanently installed cables shall be secured by corrosion-resistant, flame-retardant cable restraints having smooth edges and so rounded that the cables remain tight without their coverings or insulation being damaged. 13.27 Where non-metallic cable restraints are used to secure cables in wireways or metallic trays which are mounted in the vertical or inverted position, metallic brackets or metallic cable straps suitably positioned and adequate to support the weight of the cables, shall be provided. 13.28 All metal coverings of cable shall be electrically continuous throughout their entire length and shall be effectively grounded to the hull of the ship at both ends, except for branch circuits which may be grounded at the supply end only; the metallic braid or sheath shall be terminated at the gland or connector at which the cable enters the enclosure and shall be in good electrical contact with the enclosure. 13.29 Metallic cable support systems used for supporting cables, unless of corrosion-resistant material, shall be galvanized, or provided with equally effective protective coatings applied before erection. 13.30 All cables passing through watertight decks or watertight bulkheads shall be provided with deck tubes or watertight glands or transits as appropriate. 13.31 Where cables passing through beams, non-watertight bulkheads, etc., the openings through which they pass shall be finished in a manner that will prevent chaffing of cables during installation and throughout the life of the vessel. 13.32 Where single-core cables are used for ac circuits and dc circuits with high ripple content rated in excess of 20 amperes:
13.34 The ends of mineral-insulated, copper-sheathed cables shall be so sealed as to prevent the ingress of moisture; such sealing materials and any material used to insulate the conductors where they emerge from the insulation shall have adequate insulating and moisture-resisting properties and shall retain these properties throughout the range of temperatures to which the cable-end is to be subjected in service. 13.35 Cables shall not be installed in, or be in direct contact with, oil fuel tanks. 13.36 Except as provided hereafter, conductors of similar conductivity in sizes #1/0 AWG (53.5 mm²) and larger may be in parallel provided they are:
13.39 Where the following conditions apply, the method of splicing cables shall be in accordance with subsections 13.40 and 13.41.:
13.44 Fiber Optic and speciality cables which have unique construction qualities such as coaxial cables etc. that are not in accordance with Section 12.3 shall be installed in accordance with the following:
13.46 When equipment or cables to be installed which may produce or be susceptible to Electro-Magnetic Induction (EMI) then consideration should be given to the following:
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