BS EN ISO 8849:2021 pdf download

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BS EN ISO 8849:2021 pdf download.Small craft — Electrically operated bilge pumps.
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 generating surface temperatures in excess of 150 °C, at an ambient temperature of 60 °C, and without evidence of charring, burning or melting, — temperatures not exceeding 150 °C when the pump operates at 120 % of nominal voltage in an ambient temperature of 60 °C for 7 h.
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.BS EN ISO 8849 pdf download.

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