BS EN ISO 10133:2017 ISO 10133:2012(E)


9.2 Connections and components on panel boards shall be in locations protected from the expected conditions in conformity with IEC 60529:


— minimum IP 67 if exposed to short-term immersion; — minimum IP 55 if exposed to splashing water; — minimum IP 20 if located in protected locations inside the craft.


9.3 Panel boards (switchboards) shall be permanently marked with the nominal system voltage. EXAMPLE


12 V d.c. (or 6 V, 24 V, 32 V d.c., as appropriate for the craft). 9.4 NOTE Craft equipped with both d.c. and a.c. electrical systems shall have their distribution from either separate


panel boards or a common one with a partition or other positive means provided to separate clearly the a.c. and d.c. sections from each other. Wiring diagrams to identify circuits, components and conductors shall be included.


Electrical controls required for proper operation of the craft (e.g. horns, navigation light) should be apparent to the operator when in normal use.


10 Wiring connections and terminals 10.1 Conductor connections shall be in locations protected from the weather or in IEC 60529 IP 55 enclosures as a minimum. Connections above deck exposed to intermittent immersion shall be in IEC 60529 IP 67 enclosures as a minimum.


10.2 Metals used for terminal studs, nuts and washers shall be corrosion-resistant and galvanically compatible with the conductor and terminal. Aluminium and unplated steel shall not be used for studs, nuts or washers in electrical circuits.


10.3 All conductors shall have suitable terminals installed, i.e. no bare wires to stud or screw connections.


10.4 Screw-clamp terminals or screwless terminal blocks shall clamp conductors to ensure reliable mechanical linkage and electrical contact is properly maintained without bearing directly on conductor strands. Other terminals shall be of the ring or captive spade type not dependent on screw or nut tightness alone for retention on the screw or stud. Captive spade terminals shall be of the self-locking type.


10.5 Friction type connectors on conductors can be used in circuits not exceeding 20 A if the connection does not separate when subjected to a force of 20 N.


10.6 Twist-on connectors (wire nuts) shall not be used.


10.7 Exposed shanks of terminals shall be protected against accidental shorting by the use of insulation barriers or sleeves, except for those in the grounding system.


10.8 Solderless crimp-on terminals and connectors shall be attached with the type of crimping tool designed for the termination used and for a connection meeting the following requirements.


Conductor-to-connector and conductor-to-terminal connections shall be capable of withstanding a tensile force equal to at least the value shown in Table 1 for the smaller conductor in the connection, without separating.


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