ISO/DIS 13590 Small craft -- Personal watercraft(13)

Author: Add date: 07/24/2007 Publishing date: 07/24/2007 Hits: 9

Total 18 pages, Current page:13, Jump to page:

6.2.3 Clamps, straps or conduits shall be designed to prevent damage to the conductor insulation.
6.2.4 Conductors connecting components that can move with relation to each other shall be protected from
stress.
6.2.5 Conductors passing through bulkheads, junction boxes or other rigid surfaces shall be bushed with conduit
or grommets, or a sheath shall protect the conductor.
6.3 External ignition protection
A representative electrical system as installed in the personal watercraft, or in an enclosure simulating the personal
watercraft, shall not ignite a propane gas and air mixture that is 4,25 % to 5,25 %(V/V) propane surrounding the
electrical system when it is operated in the mode in which it draws its maximum current. The test voltage supply
shall be adjusted to 120 % of the nominal system voltage except magneto ignition systems.
6.4 Overcurrent protection
6.4.1 Except for conductors from self-limiting generators or alternators, each ungrounded current carrying
conductor shall be protected by a manual reset trip free circuit breaker or fuse. The fuse or breaker shall be within
180 mm of the origin of the conductor to be protected so long as the fuse or breaker is sized for the smallest
conductor in the circuit.
If a conductor is continuously protected from physical damage by a sheath or enclosure between its terminal ends,
the maximum distance to its protecting fuse or breaker may be increased to 500 mm from the power source
measured along the conductor.
An ungrounded supply conductor starting at a storage battery shall have its breaker or fuse within 900 mm of the
battery measured along the conductor (see figure 1).
6.4.2 The voltage rating of each circuit breaker or fuse shall not be less than the nominal voltage of the circuit it
is protecting.
6.4.3 The current ratings of the circuit breaker or fuse shall not be more than 150 % of the value in table 4 for the
conductor it is protecting including the correction factor if any part of the conductor is in an engine compartment.
6.4.4 Circuit breakers or fuses for non-self-limiting generators and alternators shall have a current rating not
exceeding 120 % of the maximum rated output at 60 °C.
ISO/DIS 13590:2001
12 © ISO 2001 – All rights reserved
Dimensions in millimetres
1) Up to 500 mm maximum is allowed if the conductor, throughout this distance, is contained in an enclosure or sheath such
as a junction box, control box or enclosed panel.
Figure 1 - Breaker/fuse location for an ungrounded supply conductor starting at a storage battery
6.5 Conductor terminations
6.5.1 All connections outside junction boxes or enclosures shall be made with closed ring, eyelet, captive spade,
or mechanical or spring lock type connectors. Wire nuts shall not be used on any connection.
6.5.2 Single or multi-connector plugs outside junction boxes or enclosures shall not separate under an axial load
of 25 N applied for 1 min.
6.5.3 A soldered joint shall not be the sole means of connection to any conductor except for battery terminal

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