8 CABLING AND WIRING
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Radiocommunication and Search and Rescue - COMSAR/Circ.32 - Harmonization of GMDSS Requirements for Radio Installations on Board SOLAS Ships - (16 August 2004) - Annex - Guidelines for the Harmonization of GMDSS Requirements for Radio Installations on Board SOLAS Ships - 8 CABLING AND WIRING

8 CABLING AND WIRING

  • .1 The cabling and wiring in the radio installation should be designed so as to prevent electrical interference to radio and navigational equipment.

  • .2 Cables should have the correct dimension to prevent voltage reduction to radio equipment when full load. The voltage reduction in copper conductors is calculated as follows: Voltage drop = 0,035 x length (m) x total load (A) divided by the cross section in squared mm.

  • .3 In order to reduce interference it is essential to have good separation between signal cables and those cables carrying higher voltages.

  • .4 All cabling and wiring should be of a type approved and suitable for use on board ships.

 8.1 Battery circuits – fuses and breakers

  • .1 Each radio system should have separate fuses for both AC and DC voltages to which it is connected. AC and DC fuse boards should be located on the bridge or in close proximity to the bridge.

  • .2 A single fault in one of the power units should not affect both the basic and duplicated radio equipment.

  • .3 All fuses and breakers should be clearly marked and labelled to clearly indicate which equipment is being protected.

Note: - A VHF with DSC, a MF/HF DSC transceiver, a NBDP with printer and Inmarsat equipment with a VDU and printer are each considered as a "radio system".

Parent topic: Annex - Guidelines for the Harmonization of GMDSS Requirements for Radio Installations on Board SOLAS Ships
Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.