ISO 13297:2020 小型工芸品—電気システム—交流および直流設備 | ページ 5

3.1

craft’s ground/earth

protective grounding

connection, provided for safety purposes, that is established by a conducting connection with the common ground/earth (potential of the earth's surface)

3.2

equipotential bonding conductor

normally non-current-carrying conductor used to put various exposed conductive parts (3.15) of direct current electrical devices and extraneous conductive parts (3.33) at a substantially equal potential

3.3

engine negative terminal

terminal on the engine, starter or solenoid to which the negative battery cable is connected

3.4

main grounding

earthing point

main point that provides connection for the DC negative conductor, AC protective grounding conductor (3.10) and bonding conductor to the craft's ground that is established by a conducting connection (intended or accidental) with the common ground (potential of the earth's surface)

Note 1 to entry: It can include any conductive part of the wetted surface of the hull in permanent contact with the water, depending on the overall system design.

3.5

overcurrent protection device

device designed to interrupt the circuit when the current flow exceeds a predetermined value for a predetermined time

3.6

residual current device

RCD

electro-mechanical switching device or association of devices designed to make, carry and break currents under normal service conditions and to cause the opening of contacts when the residual current attains a given value under specified conditions

Note 1 to entry: RCDs serve to reduce the risk of injury to people from electrical shock hazard, and damage to equipment from leakage of stray currents to earth or to other circuits.

3.7

polarization transformer

transformer that automatically orientates the neutral and active (phase) conductors (3.12) in the system in the same polarity orientation as the polarized system (3.17) of the craft

3.8

isolation transformer

transformer installed in the shore power supply circuit on a craft to electrically isolate all the normally live conductors (3.11) and the protective conductor (3.10) on the craft from the AC system conductors of the shore power supply

3.9

neutral conductor

conductor intentionally maintained at ground potential and capable of contributing to the transmission of electrical energy

3.10

protective conductor

protective grounding conductor

3.11

live conductor

conductor or conductive part intended to be energized in normal use, including a neutral conductor (3.9)

3.12

active (phase) conductor

conductor that is maintained at a difference of potential from the neutral conductor (3.9) or protective conductor (3.10)

Note 1 to entry: In a system that does not include a neutral or protective conductor, all conductors are considered active conductors.

3.13

ignition-protected

<equipment> designed and constructed to give protection against ignition of surrounding flammable gases

Note 1 to entry: The protection against ignition of surrounding flammable gases is covered in ISO 8846:1990.

3.14

system voltage

nominal voltage supplied to the craft from a power source

3.15

exposed conductive part

conductive part of electrical equipment, which can be touched and which is not normally live, but which can become live under fault conditions

3.16

panel board

switchboard

assembly of devices for the purpose of controlling and/or distributing electrical power

Note 1 to entry: It can include devices such as circuit breakers, fuses (3.29) , switches, instruments, and indicators.

3.17

polarized system

system in which the live conductors (3.11) (active and neutral) are connected in the same relation to all terminals on devices or receptacles (socket outlets) in a circuit

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

3.28

double-pole circuit breaker

device intended to interrupt both the neutral conductor (3.9) and active (phase) conductors (3.12) in a circuit simultaneously when a designated current is exceeded for a predetermined time

3.29

fuse

protective device that interrupts the circuit irreversibly when the current flow reaches a specified value for a specific time

[SOURCE:ISO 8820‑1:2014, 3.2, modified – Note 1 to entry has been deleted.]

3.30

galvanic isolator

device which can be installed in series with the AC protective conductor (3.10) of the shore power cable to block low voltage DC galvanic current flow, but permits the passage of AC normally associated with the protective conductor

3.31

inverter

device powered by a DC source, designed primarily to provide AC power at a required voltage and frequency

3.32

inverter/charger

device designed to supply either AC power to a craft’s electrical system or to utilize the craft’s AC electrical distribution system to charge or maintain a battery or batteries supplying DC

3.33

extraneous conductive part

conductive part liable to introduce a potential, generally ground/earth potential, and not forming part of the electrical installation

3.34

ground plate

means to conduct the electrical current from a craft's conductive element to the water

3.35

craft

small craft

recreational boat, and other watercraft using similar equipment, of up to 24 m length of hull (L_H)

Note 1 to entry: The measurement methodology for the length of hull is defined in ISO 8666.

[SOURCE:ISO 8666:2020, 3.15, modified – Note 1 to entry has been added.]