ISO 10133:2012 pdf download – Small craft-Electrical systems — Extra-low-voltage d.c. installations
ISO 10133:2012 pdf download – Small craft-Electrical systems — Extra-low-voltage d.c. installations.
7.3 Conductors and cables shall be supported throughout their length in conduits, cable trunking or trays, or by individual supports at maximum intervals of 450 mm.
7.4 Sheathed conductors and battery conductors to the battery disconnect switch shall be supported at maximum intervals of 300 mm with the first support not more than 1 m from the terminal, and other sheathed conductors at maximum intervals of 450 mm
EXCEPTION Sheathed outboard starter motor conductors.
7.5 Conductors which could be exposed to physical damage shall be protected by sheaths, conduits or other equivalent means. Conductors which could be exposed to physical damage, Including those passing through bulkheads or structural members, routing near sharp edges and any area where chafing may occur, shall be protected against insulation damage by chafing.
7.6 Conductors shall have minimum dimensions in accordance with TableA.2, or the conductor manufacturer’s rated current amperage and allowable voltage drop for the load to be carried. See 4.7 and 4.8.
7.7 Each conductor longer than 200 mm installed separately shall have an area of at least 1 mm2. Each
conductor in a multi-conductor sheath shall have an area of at least 0.75 mm2 and can extend out of the sheath
a distance not exceeding 800 mm.
EXCEPTION Conductors of minimum 0,75 mm2 used as Internal wiring In panel boards.
7.8 Conductors of a d.c. circuit shall not be contained in the same wiring system as an ac. circuit, unless one of the following methods of separation is used
a) for a multicore cable or cord, the cores of the d.c. circuit are separated from the cores of the ac. circuit by an earthed metal screen of equivalent current-carrying capacity to that of the largest core In either circuit;
b) the cables are insulated for their system voltage and installed in a separate compartment of a cable conduit or trunking system;
c) the cables are installed on a tray or ladder where physical separation is provided by a partition;
d) separate conduits. sheathings or trunking systems are used;
e) the d.c and a.c. conductors are fixed directly to a surface and separated by at least 100 mm.
7.9 All equipotential bonding conductors shall be identified by green or green with a yellow stripe insulation, or can be uninsulated. Conductors with green or green with a yellow stripe insulation shall not be used for current-carrying conductors.
NOTE The protective conductors of the ac. electrical system (see ISO 13297) also uses green or green with a yellow stripe insulation and may be connected to the craft engine d,c negative terminal
7.10 Means of Hlentification other than colour for d.c. positive conductors is permitted if properly identified on the craft wiring diagrams of the electrical system(s).
7.11 All d.c. negative conductors shall be identified by black or yellow insulation. If the craft is equipped with an ac. electrical system in accordance with ISO 13297. which can use black insulation for live conductors, yellow insulation shall be used for d.c. negative conductors of the d.c. system. Black or yellow insulation shall not be used for d.c. positive conductors,
NOTE 1 In conformance with IEC 6O446l. conductor insulation colours of the ac, system are:
— live conductors: black or brown;
— neutral conductors: while or light blue;
— polecbve conductors: green or green with a yellow stripe.
NOTE 2 A colour stripe may be added to conductor msulatlon for identification In the system
Crafts with ac. and d.c. systems shall avoid the use of brown, white or light blue insulation colour in the d.c. system, unless clearly separated from the ac. conductors and identified as d.c.
NOTE 3 For additional conductor spec*ftcations see ISO 67221’l.
7.12 Current.carrying conductors of the d.c. system shall be routed above areas where water can accumulate, e.g. bilges, and at least 25 mm above the level at which the automatic bilge pump switch activates.
EXCEPTION If conductors have to be routed below anticipated bilge water level, the wiring and connections shall be In an IEC 60529 lP67 enclosure, as a minimum, and there shall be no connection below the foreseeable water level.
7.13 Conductors shall be routed away from exhaust pipes and other heat sources which can damage the insulation. The minimum clearance is 50 mm from wateccooled exhaust components and 250 mm from dry exhaust components, unless an equivalent thermal barrier is provided.