BS EN ISO 8849:2021 pdf – Small craft — Electrically operated bilge pumps

BS EN ISO 8849:2021 pdf – Small craft — Electrically operated bilge pumps.
1 Scope This document specifies requirements for electrically operated bilge pumps intended for use in removing bilge water. It applies to: — direct current (DC) bilge pumps which operate at a nominal voltage not exceeding 50 V; and — single phase alternating current (AC) bilge pumps which operate at a nominal voltage not exceeding 250 V. It does not cover pumps intended for damage control. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 8846:1990, Small craft — Electrical devices — Protection against ignition of surrounding flammable gases ISO 13297:2020, Small craft — Electrical systems — Alternating and direct current installations IEC 60529:2013, Degrees of protection provided by enclosures (IP Code) 3? Terms? and? definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: — ISO Online browsing platform: available at https://www.iso.org/obp — IEC Electropedia: available at http://www.electropedia.org/ 3.1 automatic pump pump equipped with a sensing means that activates and deactivates the pump’s operation at predetermined liquid levels 3.2 nominal voltage voltage commonly used on small craft (3.5) with direct current (DC), such as 6 V, 12 V or 24 V, and alternating current (AC) such as 110/120 V or 230/240 V 3.3 submersible pump pump designed to be operated completely immersed in water 3.4 design voltage 113 % of nominal voltage (3.2)
switch(es) in the circuit and the bonding connection, if applicable. The recommended overcurrent protection for non-integrally protected bilge pumps shall be stated. 4.9 Centrifugal and axial flow pumps shall be capable of operating dry at their design voltage for at least 7 h without creating a fire hazard. Alternatively, a means integral with the pumps shall be provided to shut the pump off automatically to prevent a fire hazard. 4.10 Positive or semi-positive displacement pumps, i.e. those in which the impeller can be in continuous contact with the housing when operating dry, shall be capable of operating dry at their design voltage for at least 5 min without damage to the impeller or housing and for at least 1 h without creating a fire hazard. Alternatively, a means integral with the pumps shall be provided to shut the pump off automatically to prevent a fire hazard. Information shall be provided in the owner’s manual cautioning against operating the pump dry for more than 1 min. 5 Electrical requirements 5.1 Submersible pumps shall have watertight electrical connections, IP 67, in accordance with IEC 60529:2013. The use of a length of watertight electrical cable sealed at the pump connection is recommended, so that connections to the power supply can be made above the critical bilge-water level. 5.2 Metallic parts of a DC pump housing that can be exposed to contact with bilge water and can become a source of stray current leakage shall have provisions for equipotential bonding conductor connections. Pumps designed with a double-insulated electrical system, requiring a break in two distinct insulation systems before electrical leakage can reach exposed metallic parts, do not require a bonding connection. 5.3 Bilge pumps shall be protected against continuously locked rotor conditions by — integral overcurrent protection, or — overcurrent protection in the circuit of a size to protect the bilge-pump motor, — being capable of sustaining operation with a locked rotor for 7 h without genera
5.4 DC bilge pumps shall be capable of withstanding a DC voltage of 500 V for 1 min without leakage in excess of 1 mA. The test voltage shall be applied between the current-carrying parts and the non- current-carrying metal parts. If the pump is internally earthed, the earth connection shall be broken in order to carry out this test. AC bilge pumps shall be fitted with or supplied by a circuit protected by a residual current device (RCD). 5.5 Bilge pumps designed for automatic operation (automatic pumps) shall be provided with an override switch to permit manual operation if the automatic operation fails.