14.4.4 All electrical devices and circuits, including lighting, heating and galley equipment, should be tested under operating conditions to verify that they are suitable and satisfactory for their purposes.
14.4.5 Each communications system and alarm system should be thoroughly tested to determine its suitability and to verify its specified functioning.
14.4.6 Equipment installed to implement relevant Statutory requirements should be tested to ensure that all such requirements have been met. Where operation is required to be maintained from emergency sources of power, including automatic transfer of circuits to such emergency sources, correct functioning from and by such emergency supplies should be tested and the duration of the emergency supplies, where specified, should also be verified.
14.4.7 All equipment, including radio communication equipment, radio navigation aids, depth-sounding and broadcasting apparatus, should be tested for the purpose of detecting harmful interference. If objectionable interference is found, it should be reduced by suitable means to the level prescribed in the relevant standards.
14.4.8 Batteries should be subjected to an initial test to demonstrate their ability to supply their design loads for the duration required. The associated charging system for each battery should also be verified.
NOTE： Regular testing to demonstrate this capability should be carried out in accordance with the manufacture's recommended procedures.
14.4.9 The ventilation arrangements of vented type battery installations should be inspected to ensure that they are in accordance with the relevant IEC Standard; the arrangements for valve regulated sealed battery installations should comply with the relevant IEC Standard. Ventilation air flow should be tested to confirm that at least the minimun quantity is obtained.
14.4.10 Attention is drawn to the special tests for propulsion equipment which are detailed in the relevant IEC Standard.
14.4.11 Tests shall be made on consuming devices to verify that the allowable voltage drop has not been exceeded(see 9.4.2).
