Section 1 General

101. Electrical Installations

Electrical Installations installed in floating structures are to be complied with the requirements in Pt 6, Ch 1 of the Rules. In this case, the main source of electrical power(including generating in- stallations) and the emergency source of electrical power are to comply with 102. and 103.

102. Main source of electrical power

Electrical power supply installations of usage that can supply enough electrical power for in- stallations such as electrical appliances, etc. installed in floating structures should be provided. In this case, capacity calculation should consider diversity factor.

103. Emergency source of electrical power

1. Independent emergency source of electrical power complied with either requirement of the following items should be installed in the floating structures.

(1) Battery (discharge indicator is to be installed) that necessary electric power is always charged and electric power is to provide without excessive voltage drop.

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Society. In this case, emergency switchboard is to be installed to emergency source of electrical power as closely as possible.

2. Emergency source of electrical power by Par 1 is to be provided automatically in case main source of electrical power is out of order and then it is lost.

3. Emergency source of electrical power installed by Par 1 is to be provided not less than 6 hours at least for the following each item.

(1) Anchor lights

(2) Emergency electric lighting system installed in the following each station

(A) Corridor, stairway, ladder and exit

(B) Main generating system room and engine control room

(C) Others considered station necessary by this Society

(3) Electrical alarm system and indicators

(4) Fire detection system and manual fire alarm system

(5) Communication systems

(6) Fire pumps

(7) Automatic sprinkler systems

(8) Elevator

(9) Emergency indicating lights

4. Emergency source of electrical power installed by Par 1 is to be installed in accordance with the requirements of following each item.

(1) It is to be above the uppermost continuous deck.

(2) The operation of the emergency services are not to be influenced due alties of engine room spaces.

(3) It is to be segregated and purged from firing and electric sparks.

5. Wires used for the emergency source of electrical power system are to be

to firing and other casu-

flame-retardant.