Section 1 General

101. Application

1. Electrical equipment is generally to be in accordance with the requirements

Rules for the Classification of Steel Ships with the exclusion of those in

in Pt 6, Ch 1 of

Ch 17 and 19 and

of those for test in each Chapter in the said Part. However, electrical equipment complying with

any relevant regulation of the National Authority of the country in which the unit is to be regis- tered or international standards may be accepted, provided that they are used solely for operating purpose. The design and installation of other equipment including that used for drilling operations are to be such that there is minimal risk of fire due to its failure.

2. Where the requirements in Pt 6, Ch 1 of Rules for the Classification of Steel Ships are ap- plied in accordance with requirements in (1), the electrical equipment may be in accordance with the requirements in the following Sec 2 instead of the requirements in Pt 6, Ch 1, 201. 2, 509. 1 to 3 and 601. 2 and Ch 14 and 16 in the said Part. For the tests of the electrical equipment the requirements in Ch 5, 209. are to be applied.

102. General

1. All electrical services necessary for maintaining the unit in normal operational and habitable con- ditions will be assured without recourse to the emergency source of power.

2. Electrical services essential for safety will be assured in case of failure of the main source of elec- trical power.

3. Electrical and electronic equipment on the bridge are to be so installed that electromagnetic interfer- ence does not affect the proper function of navigational systems and equipment.

4. The safety of personnel and unit from electrical hazards will be assured.

103. Condition of inclinations

The emergency generator and its prime mover and any emergency accumulator battery are to be designed to function at full rated power when upright and when inclined up to the maximum angle of heel in the intact and damaged condition, as determined in accordance with Ch 4. However, in no case need the equipment be designed to operate when inclined more than:

(1) 25° in any direction on a column-stabilized;

(2) 15° in any direction on a self-elevating unit;and

(3) 22.5° about the longitudinal axis and/or when inclined 10° about the transverse axis on a sur-

face unit.

104. Alternative design and arrangements

When alternative design or arrangements deviate from the prescriptive provisions of the Code, an engineering analysis, evaluation and approval of the design and arrangements should be carried out in accordance with SOLAS regulation II-1/55.