BS EN ISO 13297:2021+A11:2023 ISO 13297:2020+A1:2022


3.18 fully insulated two-wire DC system


system in which both positive and negative poles remain isolated from the ground (earth), e.g. not


connected to the water through a metallic hull, the propulsion system or earthed through the AC protective conductor (3.10)


Note 1 to entry: Some systems can use a momentary ground connection for engine starting purposes and can remain isolated.


3.19 self-limiting


device whose maximum output is restricted to a specified value by its magnetic or electrical characteristics


3.20 two-wire DC system with negative ground system in which the DC negative is connected to the ground


3.21 shore power appliance inlet


fitting designed for mounting on a craft, of a shrouded male type, to connect to the female connector on the craft end of the shore power cable in order to make the electrical connection for transmission of electrical energy


3.22 trip-free circuit breaker


mechanical switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and breaking currents under specified abnormal circuit conditions such as those of overload or short circuit, and which is designed so that the resetting means cannot be manually held in place to override the current-interrupting mechanism


3.23 accessible


capable of being reached for inspection, removal or maintenance without removal of permanent craft structure


3.24 readily accessible


capable of being reached for use, inspection, removal or maintenance without the use of tools


3.25 sheath


uniform and continuous tubular protective covering of metallic or non-metallic material around one or more insulated conductors


Note 1 to entry: Examples of appropriate materials include moulded rubber, moulded plastic, woven sleeving or flexible tubing.


3.26 conduit


part of a closed wiring system of circular or non-circular cross-section for insulated conductors and/or cables in electrical installations, allowing them to be drawn in and/or replaced


3.27 cable trunking


system of closed enclosures comprising a base with a removable cover intended for the complete surrounding of insulated conductors, cables, cords and for the accommodation of other electrical equipment


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© ISO 2022 – All rights reserved


Distributed by the RYA under licence number 2020ET001 © BSI


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