<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:10pt"><div id="yiv6706265721"><div><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;"><div id="yiv6706265721"><div id="yiv6706265721yui_3_13_0_ym1_1_1390521352927_2521"><div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; font-size: 10pt;" class="yiv6706265721yui_3_13_0_ym1_1_1390521352927_2413" id="yiv6706265721yui_3_13_0_ym1_1_1390521352927_2520"><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The emergency power supply has to be adequate to simultaneously supply</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">any
electrical system needed for surfacing plus emergency lighting, emergency </div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">communications equipment, life support equipment, essential monitoring & alarm</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">equipment
such as fire alarm system, breathing air monitoring, H2 monitoring,</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">locating equipment & signal lamps.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> For charging there needs to be an indicator on the main switchboard to show whether </div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">the shore
connection line is live.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The batteries have to be sufficient for the mission when charged to 80% ( that's how I</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">interpret it)</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> All equipment running off batteries has to be able to operate at a voltage</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">of 25% (30% if operating while charging) above normal voltage or 25% below.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><span style="font-size:10pt;" id="yiv6706265721yui_3_13_0_ym1_6_1390521352927_43">It looks like they require the battery voltage to be above the lower limits in the above</span><br></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">paragraph, at the end of your day. I got a bit lost here, they refer you to GL rules for
ships</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">electrical installations (1-1-3), section 1, F. & section 3, C.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Batteries aren't allowed to leak at
angles of up to 45 degrees.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Where the battery capacity is 1000 Ah or more the battery is to be divided in to smaller units</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">so that in the event of a fault there is still some operational ability.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The use of rigid interconnection links between batteries is to be avoided.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The rating data of the battery is to be indicated on "rating plates".</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The weight of the biggest battery can't exceed 100kg.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Electrical distribution systems are to be designed so that a fault in one circuit can't impair</div><div
id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">the operation of another circuit or the power supply.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Circuits at protective low voltage aren't allowed to be routed with higher voltage circuits in</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">a joint conductor bundle or cable duct.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> All consumer circuits are to be fitted with switches. The switching action has to be on all poles.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Fuses may be used for overload protection up to a rated current of 63 A ??? don't know whether </div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">this includes circuit breakers, <span style="font-size: 10pt;">seems a bit low.</span></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">
A continuously operating insulation monitoring system is to be installed with an alarm on the control</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">stand that is tripped if the insulation value drops below a preset limit. (in general 50ohm for 1V)</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Electrical enclosures outside the hull are to be G.L. approved.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> There is a chart for the selection & dimensioning of wires in the electrical rules for ships 1-1-3 section 12.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Only halogen free materials are to be used in wire insulations.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Bus bar temperatures aren't allowed to exceed 100 C.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Where bus bars
are used for connecting equipment only sealed or insulated systems may be employed.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">This does not include switchboards & enclosed electrical service spaces.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Pressure hull penetrations are to be gas & watertight, even if they are damaged or shorn off. ( there goes the</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">blue globe cable glands)</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The positive & negative conductors from a power source aren't allowed to pass through the same hull penetration.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> Electrical conductors within the penetrating device shall be of solid material.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> The minimum insulation resistance
is 5 MOhm for the type test.</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895">Alan</div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><br></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><br></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"> </div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><br></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><br></div><div id="yiv6706265721yui_3_13_0_ym1_1_1390503922582_2895"><br></div></div></div></div></div></div></div></div></body></html>