E 11 AC AND DC ELECTRICAL SYSTEMS ON BOATS JULY 2008

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E 11 AC and DC ELECTRICAL SYSTEMS ON BOATS Based on ABYC s assessment of the existing technology and the problems associated with achieving the goals of this standard ABYC recommends compliance with this standard for all systems and associated equipment manufactured and or installed after July 31 2009 11 1 PURPOSE These standards are guides for the design construction and installation of

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ELECTRICAL PROJECT TECHNICAL COMMITTEE,William Drake Chairman. Richard Blackman Paul Fleury Thomas Marhevko,Nigel Calder Charles Game Vinod Mehta. Robert Carlson Robert Green Aaron Meyer,Pete Chisholm Mark Gropper Paul Michalczyk. James Clausen Clyde Head John Page,Ben Craig Roger Jarman Dave Potter. Wm Brian Craig Ralph Lambrecht Donald Reed,Dennis Dodge Robert Loeser Bruce Slaughter.
Jim Eichner Keith Lovegren Robert Unger,Ward Eshleman Kim MacCartney. This list represents the membership at the time the Committee was balloted. NOTE Membership on a committee shall not in and of itself constitute an endorsement of ABYC. or any document developed by the committee on which the member serves. This Standard was developed under procedures accredited as meeting the criteria for American National. Standards The Project Technical Committee that approved the Standard was balanced to ensure that. individuals from competent and concerned interests have had an opportunity to participate. This Standard which is the result of extended and careful consideration of available knowledge and. experience on the subject is intended to provide minimum performance requirements. ABYC s Project Technical Committee meetings are open to the public All inquiries regarding standards. activity interpretations or meeting attendance should be directed to the ABYC Technical Department at. comments abycinc org, ABYC and its committees do not approve certify or endorse any item construction or proprietary. REQUEST FOR INTERPRETATIONS, Upon written request the Electrical PTC will render an interpretation of any requirement of the Standard. The request for interpretation should be clear and unambiguous Requests should be presented to the PTC. in a manner in which they may be answered in a yes or no fashion. The committee reserves the right to reconsider any interpretation when or if additional information which. might affect it becomes available to the PTC Persons aggrieved by an interpretation may appeal to the. Committee for reinterpretation,2008 American Boat Yacht Council Inc. E 11 AC and DC Electrical Systems on Boats,Table of Contents.
11 1 PURPOSE 1,11 2 SCOPE 1,11 3 REFERENCED ORGANIZATIONS 1. 11 4 DEFINITIONS 2,11 5 GENERAL REQUIREMENTS 5,11 6 POWER SOURCE 9. 11 7 ISOLATION OF GALVANIC CURRENTS 13,11 8 LOAD CALCULATIONS 14. 11 9 PANELBOARD 17,11 10 OVERCURRENT PROTECTION 18. 11 11 GROUND FAULT PROTECTION AC SYSTEMS 22,11 12 SWITCHES 23.
11 13 PLUGS AND RECEPTACLES 23,11 14 SYSTEM WIRING 24. 11 15 APPLIANCES AND EQUIPMENT 30,11 16 DC GROUNDING AND BONDING 31. 11 17 APPLICATION OF TYPES OF SHORE POWER CIRCUITS 32. NOTE GREY SHADING INDICATES AN AC ONLY REQUIREMENT. LACK OF SHADING INDICATES GENERAL OR DC ONLY REQUIREMENTS. 2008 American Boat Yacht Council Inc,E 11 AC and DC ELECTRICAL SYSTEMS ON BOATS. Based on ABYC s assessment of the existing technology and the problems associated with achieving the. goals of this standard ABYC recommends compliance with this standard for all systems and associated. equipment manufactured and or installed after July 31 2009. 11 1 PURPOSE, These standards are guides for the design construction and installation of alternating current AC electrical. systems on boats and of direct current DC electrical systems on boats. NOTE The United States Coast Guard has promulgated mandatory requirements for electrical. systems in Title 33 CFR 183 Subpart I Section 183 Refer to the CFR for current federal. requirements,11 2 SCOPE,These standards apply, 11 2 1 to alternating current AC electrical systems on boats operating at frequencies of 50 or 60.
hertz and less than 300 volts including shore powered systems up to the point of connection to the shore. outlet and including the shore power cable and, 11 2 2 to direct current DC electrical systems on boats that operate at potentials of 50 volts or less. EXCEPTION Any conductor that is part of an outboard engine assembly and does not extend. beyond the outboard engine manufacturer s supplied cowling. 11 3 REFERENCED ORGANIZATIONS, ABYC American Boat Yacht Council Inc 613 Third Street Suite 10 Annapolis MD 21403 Phone. 410 990 4460 Fax 410 990 4466 Website www abycinc org. ABYC A 1 Marine Liquefied Petroleum Gas LPG Systems. ABYC A 3 Galley Stoves,ABYC A 16 Electric Navigation Lights. ABYC A 22 Marine Compressed Natural Gas CNG Systems. ABYC A 28 Galvanic Isolators,ABYC A 31 Battery Chargers and Inverters. ABYC E 2 Cathodic Protection,ABYC E 10 Storage Batteries.
ABYC H 2 Ventilation of Boats Using Gasoline,ABYC H 24 Gasoline Fuel Systems. ABYC H 33 Diesel Fuel Systems,ABYC T 5 Safety Signs and Labels. ABYC TE 4 Lightning Protection, ABYC TH 22 Educational Information About Carbon Monoxide. ABYC TH 23 Design Construction and Testing of Boats in Consideration of Carbon. 2008 American Boat Yacht Council Inc, CFR Code Of Federal Regulations and other government publications Obtain from the Superintendent Of. Documents United States Government Information POB 371 954 Pittsburgh PA 15250 7954 Phone. 202 512 1800 or Fax 202 512 2250 Website www access gpo gov An excerpted edition of the CFR is. also available from ABYC Inc,33 CFR 183 410 a, IEC International Electrotechnical Commission 3 rue de Varembe PO Box 131 CH 1211 GENEVA 20.
Switzerland Phone 41 22 919 0211 Fax 41 22 919 0300 Website www iec ch. IEC Standard 60529 Type IP67,IEC Standard 60529 Type IP 54. NEMA National Electrical Manufacturer s Association 1300 North 17 St Suite 1847 Rosslyn VA 22209. Phone 703 841 3200 Fax 703 841 5900 Website www nema org. Standard 250 Type 6P,Standard 250 Type 3, NFPA National Fire Protection Association One Batterymarch Park Quincy MA 02269 9101 Phone. 617 770 3000 Fax 617 770 0700 Website www nfpa org. NFPA 70 The National Electrical Code, SAE Society of Automotive Engineers 400 Commonwealth Drive Warrendale PA 15096 Phone. 724 776 4841 Fax 724 776 5760 Website www sae org, SAE J1171 External Ignition Protection of Marine Electrical Devices. SAE J378 Marine Engine Wiring,SAE J1127 Battery Cable.
SAE J1128 Low Tension Primary Cable, USCG United States Coast Guard USCG Headquarters Washington DC 25093 0001 Coast Guard. Website www uscgboating org, UL Underwriters Laboratories Marine Department POB 13995 12 Laboratory Drive Research Triangle. Park NC 27709 Phone 919 549 1400 Fax 919 547 6000 Website www ul com. UL 83 Thermoplastic Insulated Wires and Cables,UL 94 Tests For Flammability Of Plastic Materials. UL 310 Electrical Quick Connect Terminals, UL 489 Molded Case Circuit Protectors For Circuit Breaker Enclosures. UL 498 Attachment Plugs and Recepticles,UL 514A Metallic Outlet Boxes.
UL 514B Nonmetallic Outlet Boxes Flush Device Boxes and Covers. UL 943 Ground Fault Circuit Interrupters, UL 1053 Ground Fault Sensing and Relaying Equipment. UL 1059 Terminal Blocks, UL 1077 Supplementary Protectors For Use In Electrical Equipment. UL 1426 Cables for Boats, UL 1500 Ignition Protection Test For Marine Products. UL 1561 Dry Type General Purpose and Power Transformers. 11 4 DEFINITIONS, For the purposes of this standard the following definitions apply. 11 4 1 AC grounded conductor A current carrying conductor that is intentionally maintained at ground. NOTE This may be referred to as the neutral white conductor in AC electrical systems. 2008 American Boat Yacht Council Inc, 11 4 2 AC grounding conductor green or green with a yellow stripe A conductor not normally carrying.
current used to connect the metallic non current carrying parts of AC electrical equipment to the AC. grounding bus engine negative terminal or its bus and to the source ground. NOTE The source of electrical power may be the shore AC power an inverter an isolation. transformer or a generator, 11 4 3 Battery cold cranking performance rating 0 F 17 8 C The discharge load in amperes that a. battery at 0 F 17 8 C can deliver for 30 seconds and maintain a voltage of 1 2 volts per cell or higher. e g 7 2 volts for a 12 volt battery, 11 4 4 Battery reserve capacity The number of minutes a new fully charged battery at 80 F 26 7 C can. be continuously discharged at 25 amperes and maintain a voltage of 1 75 volts or higher per cell e g 10 5. volts for a 12 volt battery, 11 4 5 DC grounded conductor A current carrying conductor connected to the side of the power source. that is intentionally maintained at boat ground potential. 11 4 6 DC grounding conductor A normally non current carrying conductor used to connect metallic non. current carrying parts of direct current devices to the engine negative terminal or its bus. 11 4 7 Double insulation system A system comprised of basic insulation and supplementary insulation. with the two insulations physically separated and so arranged that they are not simultaneously subjected to. the same deteriorating influences e g temperature contaminants to the same degree. 11 4 8 Engine negative terminal The point on the engine at which the negative battery cable is. 11 4 9 Equipment enclosure The outside shell of equipment that provides personnel protection from. electrical hazards burns rotating machinery sharp edges and provides protection to the device from. mechanical damage or weather, 11 4 10 Equipment Leakage Circuit Interrupter ELCI A residual current device which detects equipment. ground fault leakage current and disconnects all ungrounded 110 V 240V and grounded 110 V neutral. current carrying conductors from the supply source at a preset trip threshold. 11 4 11 Galvanic isolator A device installed in series with the AC grounding green conductor of the. shore power cable to effectively block low voltage DC galvanic current but permit the passage of. alternating current AC normally associated with the AC grounding green conductor. 11 4 12 Ground The potential of the earth s surface The boat s ground is established by a conducting. connection intentional or accidental with the earth including any conductive part of the wetted surface of a. 11 4 13 Ground fault circuit interrupter GFCI A device intended for the protection of personnel that. functions to de energize a circuit or portion thereof within an established period of time when a current to. ground exceeds some predetermined value that is less than that required to operate the overcurrent. protective device of the supply circuit, 11 4 14 Ground fault protector GFP A device intended to protect equipment by interrupting the electric.
current to the load when a fault current to ground exceeds some predetermined value that is less than that. required to operate the overcurrent protection device of that supply circuit. 11 4 15 Ignition protection The design and construction of a device such that under design operating. conditions, a it will not ignite a flammable hydrocarbon mixture surrounding the device when an ignition source causes. an internal explosion or, b it is incapable of releasing sufficient electrical or thermal energy to ignite a hydrocarbon mixture or. c the source of ignition is hermetically sealed,2008 American Boat Yacht Council Inc. 1 A flammable hydrocarbon mixture is a mixture of gasoline and air CNG and air or propane LPG. and air between the lower explosive limit LEL and upper explosive limit UEL. 2 It is not intended to require such devices to be explosion proof as that term is defined in the. National Electrical Code of the NFPA pertaining to shore systems. 3 It is intended that the protection provided be generally equivalent to that of wiring permitted by. this standard wherein a definite short or break would be necessary to produce an open spark. 4 Devices that are explosion proof are considered to be ignition protected when installed with the. appropriate fittings to maintain their explosion proof integrity. 5 It is not intended to require such devices to be intrinsically safe per Article 504 of the National. Electrical Code of the NFPA, 6 Devices that are intrinsically safe are considered to be ignition protected. 7 Test standards to determine ignition protection include SAE J1171 External Ignition Protection of. Marine Electrical Devices and UL 1500 Ignition Protection Test For Marine Products and the. electrical system requirements for boats in Title 33 CFR 183 410 a. 11 4 16 Loom A flexible covering designed to protect conductors. 11 4 17 Overcurrent protection device A device such as a fuse or circuit breaker designed to interrupt the. circuit when the current flow exceeds a predetermined value. 11 4 18 Panelboard An assembly of devices for the purpose of controlling and or distributing power on a. boat It includes devices such as circuit breakers fuses switches instruments and indicators. 11 4 19 Pigtails Conductors provided integral to an electrical component or appliance for the purpose of. connection to external circuits, 11 4 20 Polarized system AC A system in which the grounded and ungrounded conductors are connected.
in the same relation to terminals or leads on devices in the circuit. 11 4 21 Polarized system DC A system in which the grounded negative and ungrounded positive. conductors are connected in the same relation to terminals or leads on devices in the circuit. 11 4 22 Readily accessible Capable of being reached quickly and safely for effective use under. emergency conditions without the use of tools, 11 4 23 Self limiting A device whose maximum output is restricted to a specified value by its magnetic or. electrical characteristics, 11 4 24 Sheath A material used as a continuous protective covering such as overlapping electrical tape. woven sleeving molded rubber molded plastic loom or flexible tubing around one or more insulated. conductors, 11 4 25 Shore power inlet The fitting designed for mounting on the boat of a reverse service type. requiring a female connector on the shore power cable in order to make the electrical connection. 11 4 26 Switchboard An assembly of devices for the purpose of controlling and or distributing power on a. boat It may include devices such as circuit breakers fuses switches instruments and indicators They. are generally accessible from the rear as well as from the front and are not intended to be installed in. 11 4 27 Transformer isolation A transformer meeting the requirements of E 11 7 1 installed in the shore. power supply circuit on a boat to electrically isolate all AC system conductors including the AC grounding. conductor green on the boat from the AC system conductors of the shore power supply. 2008 American Boat Yacht Council Inc, 11 4 28 Transformer polarization An isolated winding transformer i e a dry type encapsulated lighting. transformer installed in the shore power supply circuit on the boat to electrically isolate the normally current. carrying AC system conductors but not the AC grounding conductor green from the normally current. carrying conductors of the shore power supply, NOTE Electrostatic shields that are available on some lighting transformers generally do not meet.
the fault current ampacity requirements of E 11 7 1 3. 11 4 29 Trip free circuit breaker A resettable overcurrent protection device designed so that the means of. resetting cannot override the current interrupting mechanism. 11 4 30 Watertight Constructed so that water will not enter the enclosure under the test conditions. specified in NEMA Standard 250 Type 6P or IEC Standard 60529 Type IP67. 11 4 31 Weatherproof Constructed or protected so that exposure to the weather will not interfere with. successful operation under the test conditions specified in NEMA Standard 250 Type 3 or IEC Standard. 60529 Type IP 54,11 5 GENERAL REQUIREMENTS, 11 5 1 AMBIENT TEMPERATURE The ambient temperature of machinery spaces is considered to. be 50 C 122 F and of all other spaces is considered to be 30 C 86 F The ambient temperature for rating. of shore power cables shall be 30 C 86 F,11 5 2 MARKING. 11 5 2 1 Marking of Controls All switches and electrical controls shall be marked to indicate their. EXCEPTION A switch or electrical control whose purpose is obvious and whose mistaken operation. will not cause a hazardous condition, 11 5 2 2 Marking of Equipment Electrical equipment except a part of an identified assembly such as. an engine shall be marked or identified by the manufacturer to indicate. 11 5 2 2 1 manufacturer s identification,11 5 2 2 2 product identification or model number. 11 5 2 2 3 AC electrical rating in volts and amperes or volts and watts OR. 11 5 2 2 4 DC electrical rating in volts as appropriate. 11 5 2 2 5 DC electrical equipment rated amperage or wattage. 11 5 2 2 6 the terminal polarity or identification if necessary to operation. 11 5 2 2 7 phase and frequency if applicable and, 11 5 2 2 8 Ignition Protected if applicable This shall be identified by a marking such as SAE.
J1171 Marine UL Marine Ignition Protected or Ignition Protected. 11 5 2 2 9 Self Limiting if applicable followed by percent of rated output or maximum amperage. 2008 American Boat Yacht Council Inc,11 5 3 IGNITION PROTECTION. 11 5 3 1 Potential electrical sources of ignition located in spaces containing gasoline powered. machinery or gasoline fuel tank s or joint fitting s or other connection s between components of a. gasoline system shall be ignition protected unless the component is isolated from a gasoline fuel source as. described in E 11 5 3 3 See FIGURE 1 FIGURE 2 FIGURE 3 FIGURE 4 FIGURE 5 FIGURE 6 FIGURE. 7 and FIGURE 8,1 Boats using diesel fuel as the only fuel source. 2 Outboard engines mounted externally or in compartments open to the atmosphere in accordance. with the requirements of ABYC H 2 Ventilation of Boats Using Gasoline. 11 5 3 2 If LPG or CNG is provided on the boat all electrical potential sources of ignition located in. compartments containing LPG CNG appliances cylinders fittings valves or regulators shall be ignition. EXCEPTION For boats with LPG CNG systems installed in accordance with ABYC A 1 Marine. Liquefied Petroleum Gas LPG Systems or ABYC A 22 Marine Compressed Natural Gas CNG. Systems and stoves that comply with ABYC A 3 Galley Stoves electrical devices in the following. compartments are excepted,1 Accommodation spaces, 2 Open compartments having at least 15 square inches 968 mm of open area per cubic foot. 0 03 m of net compartment volume exposed to the atmosphere outside of the craft. 11 5 3 3 An electrical component is isolated from a gasoline fuel source if. 11 5 3 3 1 a bulkhead that meets the requirements of E 11 5 3 4 See FIGURE 7 FIGURE 8 is. between the electrical components and the gasoline fuel source or. 11 5 3 3 2 the electrical component is, 11 5 3 3 2 1 lower than the gasoline fuel source and a means is provided to prevent gasoline fuel and. gasoline fuel vapors that may leak from the gasoline fuel sources from becoming exposed to the electrical. component or, 11 5 3 3 2 2 higher than the gasoline fuel source and a deck or other enclosure is between it and the.
gasoline fuel source or, 11 5 3 3 2 3 the distance between the electrical component and the gasoline fuel source is at least two. feet 610mm and the space is open to the atmosphere See FIGURE 6. 11 5 3 4 Each bulkhead required by E 11 5 3 3 1 shall See FIGURE 7 FIGURE 8. 11 5 3 4 1 separate the electrical component from the fuel source and extend both vertically and. horizontally the distance of the open space between the gasoline fuel source and the ignition source and. 11 5 3 4 2 resist a water level that is 12 inches 305 mm high or one third of the maximum height of. the bulkhead whichever is less without seepage of more than one quarter fluid ounce 7 5 cc of fresh. water per hour and, 11 5 3 4 3 shall have no opening higher than 12 inches 305 mm or one third the maximum height of. the bulkhead whichever is less unless the opening is used for the passage of conductors piping ventilation. ducts mechanical equipment and similar items or doors hatches and access panels and the maximum. annular space around each item or door hatch or access panel must not be more than one quarter inch. 2008 American Boat Yacht Council Inc, 11 5 3 5 To minimize the potential for migration of carbon monoxide from machinery compartments. containing gasoline engines to adjacent accommodation compartments bulkhead and deck penetrations. shall be in accordance with the requirements of ABYC H 2 Ventilation of Boats Using Gasoline. NOTE For additional information see ABYC TH 22 Educational Information About Carbon. Monoxide and ABYC TH 23 Design Construction and Testing of Boats in Consideration of Carbon. 11 5 4 GENERAL REQUIREMENTS DC SYSTEMS, 11 5 4 1 Two Wire System All direct current DC electrical distribution systems shall be of the two. wire type See FIGURE 9A FIGURE 9B FIGURE 10A and FIGURE 10B. EXCEPTION Engine mounted equipment, 11 5 4 2 DC Grounding Systems and Bonding A metallic hull or the bonding and DC grounding.
systems shall not be used as a return conductor See FIGURE 9A FIGURE 9B FIGURE 10A and. FIGURE 10B and E 11 16, 11 5 4 3 Grounded Systems If one side of a two wire direct current system is connected to ground it. shall be the negative side and polarized as defined in E 11 4. 11 5 4 4 Multiple Engine Installation If a boat has more than one engine with a grounded cranking. motor which includes auxiliary generator engine s the engines shall be connected to each other by a. common conductor that can carry the cranking motor current of each of the grounded cranking motor. circuits Outboard engines shall be connected at the battery negative terminals See FIGURE 10A. 11 5 4 5 Crossover Parallel Cranking Motor Circuits In multiple inboard engine installations which. includes auxiliary generator s with cross over parallel grounded cranking motor systems the engines shall. be connected together with a cable large enough to carry the cranking motor current This cable and its. terminations shall be in addition to and independent of any other electrical connections to the engines. including those required in E 11 5 4 4 See FIGURE 10A. 11 5 4 6 If a paralleling switch is installed it shall be capable of carrying the largest cranking motor. NOTE A paralleling switch may be either of the maintained contact or momentary contact type. 11 5 4 7 DC System Negative Connections, 11 5 4 7 1 If an alternating current AC system is installed the main AC system grounding bus shall. be connected to, 11 5 4 7 1 1 the engine negative terminal or the DC main negative bus on grounded DC systems or. 11 5 4 7 1 2 the boat s DC grounding bus in installations using ungrounded DC electrical systems. See Figure 18, 11 5 4 7 2 The negative terminal of the battery and the negative side of the DC system shall be. connected to the engine negative terminal or its bus On boats with outboard motors the load return lines. shall be connected to the battery negative terminal or its bus unless specific provision is made by the. outboard motor manufacturer for connection to the engine negative terminal. 11 5 4 7 3 If an accessory negative bus with provision for additional circuits is used for the. connection of accessories the ampacity of this bus and the conductor connected to the engine negative. terminal or the DC main negative bus shall be at least equal to the ampacity of the feeder s to the. panelboard s supplying the connected accessories See Figure 9A Figure 9B Figure 10A and Figure 10B. and E 11 16,2008 American Boat Yacht Council Inc, 11 5 4 7 4 If the negative side of the DC system is to be connected to ground the connection shall.
be made only from the engine negative terminal or its bus to the DC grounding bus This connection shall. be used only as a means of maintaining the negative side of the circuit at ground potential and is not to carry. current under normal operating conditions, 11 5 4 7 5 Continuously energized parts such as positive battery terminals and both ends of all wire. connected thereto shall be physically protected with boots or other form of protection that cover all. energized surfaces to prevent accidental short circuits. EXCEPTION Circuits that have overcurrent protection at the source of power in accordance with E. 11 5 5 GENERAL REQUIREMENTS AC SYSTEMS, 11 5 5 1 The system shall be polarized as defined in E 11 4. 11 5 5 2 Grounded Neutral A grounded neutral system is required The neutral for AC power sources. shall be grounded only at the following points, 11 5 5 2 1 The shore power neutral is grounded through the shore power cable and shall not be. grounded on board the boat, 11 5 5 2 2 The secondary neutral of an isolation transformer or polarization transformer shall be. grounded at the secondary of an isolation or polarization transformer See DIAGRAM 6 DIAGRAM 7. DIAGRAM 8 and DIAGRAM 9 See EXCEPTION, 11 5 5 2 3 The generator neutral shall be grounded at the generator See DIAGRAM 2 or DIAGRAM.
11 5 5 2 4 The inverter output neutral shall be grounded at the inverter The inverter output neutral. shall be disconnected from ground when the inverter is operating in the charger or the feed through. mode s See ABYC A 31 Battery Chargers and Inverters. EXCEPTION Exception to E 11 5 5 2 2 E 11 5 5 2 3 and E 11 5 5 2 4 For systems using an isolation. transformer or polarization transformer both the generator or inverter neutral and the transformer. secondary neutrals may be grounded at the AC main grounding bus instead of at the generator. inverter or transformer secondaries See DIAGRAM 5, 11 5 5 3 The main AC system grounding bus shall be connected to. 11 5 5 3 1 the engine negative terminal or the DC main negative bus on grounded DC systems or. 11 5 5 3 2 the boat s DC grounding bus in installations using ungrounded DC electrical systems. 11 5 5 4 In AC circuits all current carrying conductors and the grounding conductor shall be run. together in the same cable bundle or raceway, 11 5 5 5 There shall be no switch or overcurrent protection device in the AC grounding green. 11 5 5 5 1 Where isolation of galvanic currents is desirable only devices meeting the requirements of. ABYC A 28 Galvanic Isolators shall be used in the grounding path. 11 5 5 6 Isolation of Sources Individual circuits shall not be capable of being energized by more than. one source of electrical power at a time Each shore power inlet generator or inverter is considered a. separate source of power, 11 5 5 6 1 Transfer of Power The transfer of power to a circuit from one source to another shall be. made by a means that opens all current carrying conductors including neutrals before closing the alternate. source circuit to maintain isolation of power sources. 2008 American Boat Yacht Council Inc, 11 5 5 6 2 Multiple Shore Power Inlets Where more than one shore power inlet is used the shore. power neutrals shall not be connected together on board the boat. EXCEPTION Exception to E 11 5 5 6 and its subsections The grounded neutral from a polarization. transformer isolation transformer generator or inverter may be permanently connected to the same. main AC grounding bus See E 11 17 DIAGRAM 5 and is not required to be switched. 11 5 5 7 Power Source Disconnecting Means A means for disconnecting all power sources from the. load shall be provided at the same location, 11 5 5 8 Guarding of Energized Parts Energized parts of electrical equipment shall be guarded against.
accidental contact by the use of enclosures or other protective means Access to energized parts of the. electrical system shall require the use of hand tools An electrical enclosure shall not be used for any other. 11 6 POWER SOURCE,11 6 1 BATTERY,11 6 1 1 Battery Capacity. 11 6 1 1 1 The battery or battery bank shall have at least the cold cranking amperage required by. the engine manufacturer, 11 6 1 1 2 The battery or battery bank shall have a rated reserve capacity so that. 11 6 1 1 2 1 for boats with one battery charging source the battery shall be capable of supplying the. total load of Column A in TABLE II for a minimum of 1 1 2 hours or. 11 6 1 1 2 2 for boats with multiple simultaneous battery charging sources the capacity of all charging. sources except the largest charging source shall be subtracted from the total load of Column A The battery. shall be capable of supplying the resulting differences for a minimum of 1 1 2 hours. 11 6 1 1 3 The values of batteries reserve capacity are found in TABLE I or use the following. formula derived from Peukert s equation to calculate the required reserve capacity. T 0 0292 x I x 60 where,T battery reserve capacity in minutes. I total current of column A in amperes per E 11 8 1 1. 2008 American Boat Yacht Council Inc, TABLE I RESERVE CAPACITY OF BATTERIES DERIVED FROM PEUKERT S EQUATION. Reserve Capacity Reserve Ampere,Amperes Minutes Hours C20 Rate.
Reserve 2 amp,10 29 14 5,20 69 34 5,30 113 56 5,45 185 92 5. 50 211 105 5,55 237 118 5,60 264 132,65 291 145 5,70 318 159. 75 347 173 5,80 375 187 5,85 404 202,90 433 216 5,95 463 231 5. 100 493 246 5,105 523 261 5,110 554 277,Based on conventional lead acid technology. 1 Table I is calculated using Peukert s equation, 2 For banks constructed of multiple paralleled batteries divide the amperage requirement by the.
number of batteries Reserve minutes apply to each individual battery in the bank. 11 6 1 2 Battery Switch, 11 6 1 2 1 A battery switch shall be installed in the positive conductor s from each battery or battery. bank with a CCA rating greater than 800 amperes, Trolling motor conductors connected to dedicated trolling motor batteries provided with overcurrent. protection at the battery and a manual means of electrical disconnect separate from the trolling. motor controls, NOTE Conductors supplying the following may be connected to the battery side of the switch See. a Electronic equipment with continuously powered memory. b Safety equipment such as bilge pumps alarms CO detectors and bilge blowers. c Battery charging equipment,2008 American Boat Yacht Council Inc. 11 6 1 2 2 A battery switch shall be mounted in a readily accessible location as close as practicable. to the battery, 11 6 1 2 3 Battery Switch Ratings The intermittent rating of a battery switch shall not be less than.
the maximum cranking current of the largest engine cranking motor that it serves The minimum continuous. rating of a battery switch shall be the total of the ampacities of the main overcurrent protection devices. connected to the battery switch or the ampacity of the feeder cable to the switch whichever is less. 11 6 2 POWER SOURCE FOR AC SYSTEMS,11 6 2 1 AC System Voltage. 11 6 2 2 Nominal system voltages for AC electrical systems shall be selected from the following. 11 6 2 2 1 120 volts AC single phase,11 6 2 2 2 240 volts AC single phase. 11 6 2 2 3 120 240 volts AC single phase,11 6 2 2 4 120 240 volts AC delta three phase or. 11 6 2 2 5 120 208 volts AC Wye three phase,11 6 3 SHORE POWER. 11 6 3 1 Shore Power Supply, 11 6 3 1 1 Power Inlet The receptacle or receptacles installed to receive a connecting cable to.
carry AC shore power aboard shall be a male type connector. 11 6 3 1 1 1 Power inlets installed in locations subject to rain spray or splash shall be weatherproof. whether or not in use, 11 6 3 1 1 2 Power inlets installed in areas subject to flooding or momentary submersion shall be. watertight whether or not in use, 11 6 3 1 1 3 Metallic power inlets installed on metallic or carbon fiber reinforced boats using an. isolation transformer or a galvanic isolator shall be insulated from metallic structure and components On. non metallic boats using an isolation transformer or a galvanic isolator the power inlet shall be insulated. from metallic components connected to the boat s ground. 11 6 3 1 2 Shore Power Cable On each boat equipped with an AC shore power system a shore. power cable that contains the conductors for the power circuit and a grounding green conductor shall be. 11 6 3 1 2 1 Except where the shore power cable is permanently connected to the boat the boat end. of this cable shall be terminated with a locking and grounding female type connector to match the boat. power inlet See FIGURE 13 and FIGURE 14, 11 6 3 1 2 2 The shore power cable shall be flexible cord with the minimum properties of Type SOW. STW STOW SEOW or STOOW and shall be suitable for outdoor use The shore connection end of this. cable shall be fitted with a locking and grounding type plug with the required number of poles and shall. comply with Article 555 of the National Electrical Code See FIGURE 13 or and Table VII A. EXCEPTION Pin and sleeve devices in accordance with Figure14. 11 6 3 2 Shore Power Inlet Warning, 11 6 3 2 1 Labels and warnings shall comply with ABYC T 5 Safety Signs and Labels. 2008 American Boat Yacht Council Inc, 11 6 3 2 2 Labels shall include the following informational elements.
11 6 3 2 2 1 the signal word for the level of hazard intensity. 11 6 3 2 2 2 nature of the hazard, 11 6 3 2 2 3 consequences that can result if the instructions to avoid the hazard are not followed and. 11 6 3 2 2 4 instructions on how to avoid the hazard. 11 6 3 2 3 A permanently mounted waterproof warning label shall be located at each shore power. inlet location on the boat,NOTE An example of such a label follows. Electrical shock and fire hazard,Failure to follow these instructions. may result in injury or death,1 Turn off the boat s shore power connection. switch before connecting or disconnecting the,shore power cable.
2 Connect shore power cable at the boat first,3 If polarity warning indicator is activated. immediately disconnect cable,4 Disconnect shore power cable at shore outlet. 5 Close shore power inlet cover tightly,DO NOT ALTER SHORE POWER CABLE. CONNECTORS,EXCEPTIONS, 1 Item 3 is not required if a polarity indicator is not installed See E 11 6 3 3. 2 Items 2 and 4 are not required for permanently connected shore power cables. 11 6 3 3 Shore Power Polarity Devices, 11 6 3 3 1 Reverse polarity indicating devices providing a continuous visible or audible signal shall.
be installed in 120 V AC shore power systems and must respond to the reversal of the ungrounded black. and the grounded white conductors See E 11 17 1 DIAGRAM 3 if. 11 6 3 3 1 1 the polarity of the system must be maintained for the proper operation of the electrical. devices in the system or, 11 6 3 3 1 2 a branch circuit is provided with overcurrent protection in only the ungrounded current. carrying conductors per E 11 10 2 6 1 Exception,2008 American Boat Yacht Council Inc.

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