Section 6 Electrical installation
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 6 Control, Electrical, Refrigeration and Fire - Chapter 3 Refrigerated Cargo Installations - Section 6 Electrical installation

Section 6 Electrical installation

Parent topic: Chapter 3 Refrigerated Cargo Installations

6.1 General

6.1.1 Where the refrigerating machinery is to be electrically driven, the requirements of Pt 6, Ch 2, 2 Main source of electrical power are to be complied with, as applicable.

6.1.2 The generating capacity available for the refrigerated installation is to be sufficient to supply power to the installation during cooling down of a complete cargo to, and maintenance of, the notation temperature conditions in all refrigerated spaces at the Rule maximum ambient and sea-water temperatures.

6.1.3 Electrical equipment is not to be installed in spaces in which ammonia refrigerant is used or stored unless it is essential for operational purposes. Where electrical equipment is installed in such spaces the requirements of Pt 6, Ch 3, 6.2 Electrical equipment for use in explosive gas atmospheres are to be complied with.

6.2 Electrical equipment for use in explosive gas atmospheres

6.2.1 Lighting fittings are to be of a certified safe-type and be arranged on at least two independent final branch circuits. Switches and protective devices are to interrupt all lines or phases and are to be located outside the space.

6.2.2 Where electric motors driving ventilation fans are located within the spaces, within ventilation ducts, or within three metres of ventilation openings, they are to be of a certified safe-type.

6.2.3 Monitoring control and alarm systems which are required to operate under conditions of ammonia leakage are to be of a certified safe-type.

6.2.4 Electrical equipment which is not of a certified safe-type is to de-energise automatically if the ammonia concentration within the space exceeds 1,0 per cent by volume.

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