Section 8 Testing and Trials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Construction & Classification of Submersibles & Diving Systems, July 2022 - Part 6 Electrical Installations and Control Engineering Systems - Chapter 1 Electrical Installations - Section 8 Testing and Trials

Section 8 Testing and Trials

Parent topic: Chapter 1 Electrical Installations

8.1 General

8.1.1 High voltage and insulation resistance tests, in accordance with the Rules and Regulations for the Classification of Ships, July 2022, Pt 6, Ch 2, 21.1 Testing 21.1.2 to Pt 6, Ch 2, 21.1 Testing 21.1.4, are to be satisfactorily carried out on all electrical equipment, complete, or in sections, at the manufacturer’s premises and a test report issued by the manufacturer.

8.1.2 All electrical systems and equipment are to be tested before the diving system is put in service.

8.2 Trials

8.2.1 Before a new installation, or any alteration or addition to an existing installation, is put into service the applicable trials in Rules and Regulations for the Classification of Ships, July 2022, Pt 6, Ch 2, 21.2 Trials 21.2.2 to Pt 6, Ch 2, 21.2 Trials 21.2.7 are to be carried out. These trials are in addition to any acceptance tests which may have been carried out at the manufacturer’s works and are to be to the Surveyor’s satisfaction.

8.2.2 Electrical protective devices are to be checked; in addition, an insulation test is to be performed on the electrical equipment in the compression chambers.

8.2.3 The insulation resistance is to be measured of all circuits and electrical equipment, using a direct current insulation tester, between:
  1. all current carrying parts connected together and earth and, so far as is reasonably practicable;
  2. all current carrying parts of different polarity or phase; The minimum values of test voltage and insulation resistance are given in the Rules and Regulations for the Classification of Ships, July 2022, Table 2.21.2 Test voltage and minimum insulation. The installation may be subdivided and appliances may be disconnected if initial tests produce results less than these figures.
8.2.4 Tests are to be made to verify the effectiveness of:
  1. earth continuity conductor;
  2. the earthing of non-current carrying exposed metal parts of electrical equipment and cables not exempted by the Rules and Regulations for the Classification of Ships, July 2022, Pt 6, Ch 2, 11.12 Installation of electric and optical fibre cables in protective casings 11.12.2;
  3. Bonding for the control of static electricity.

8.2.5 All essential and other important items of equipment are to be operated under service conditions, though not necessarily at full load or simultaneously, for a sufficient length of time to demonstrate that they are satisfactory.

8.2.6 Voltage drop is to be measured, where necessary, to verify that this is not in excess of that specified in Pt 6, Ch 1, 1.5 Design and construction 1.5.10 or Pt 6, Ch 1, 1.5 Design and construction 1.5.12, as relevant.

8.2.7 On completion of the public address system tests, the Surveyor is to be provided with two copies of the test schedule, detailing the measured sound pressure levels. Such schedules are to be signed by the Surveyor and the Builder.

8.3 High voltage cables

8.3.1 Where any supply is taken from a high voltage system, cabling is to be tested in accordance with the Rules and Regulations for the Classification of Ships, July 2022, Pt 6, Ch 2, 21.3 High voltage cables.

8.4 Hazardous areas

8.4.1 All electric equipment located in hazardous areas is to be examined to ensure that it is of a type permitted by the Rules, has been installed in compliance with its certification, and that the integrity of the protection concept has not been impaired.

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