2.10.1 All electrical equipment and installation,
including power supply arrangements, should be designed for the environment
in which they will operate to minimize the risk of fire, explosion,
electrical shock and emission of toxic gases to personnel, and galvanic
action of the surface compression chamber or diving bell.
2.10.2 In the event of failure of the main source
of electrical power supply to the diving system an independent source
of electrical power should be available for the safe termination of
the diving operation. It is admissible to use the ship's emergency
source of electrical power as an emergency source of electrical power
if it has sufficient electrical power capacity to supply the diving
system and the emergency load for the vessel at the same time.
2.10.3 The alternative source of electrical power
should be located outside the machinery casings to ensure its functioning
in the event of fire or other casualty causing failure to the main
electrical installation.
2.10.4 Each surface compression chamber and diving
bell should have adequate means of normal and emergency lighting to
allow an occupant to read gauges and operate the system within each
compartment.