MARINAS AND BOATYARDS

70-629 553-10. Equipment Grounding. (a) Electrical Systems. All enclosures and exposed metal parts of electrical systems shall be bonded to the grounding bus. (b) Cord-Connected Appliances. Where required to be grounded, cordconnected appliances shall be grounded by means of an equipment grounding conductor in the cord and a grounding-type attachment plug. 553-11. Bonding of Noncurrent-Carrying Metal Parts. All metal parts in contact with the water, all metal piping, and all noncurrent-carrying metal parts that may become energized, shall be bonded to the grounding bus in the panelboard. ARTICLE 555 - MARINAS AND BOATYARDS 555-1. Scope. This article covers the installation of wiring and equipment in the areas comprising fixed or floating piers, wharfs, docks, and other areas in marinas, boatyards, boat basins, and similar establishments that are used, or intended for use, for the purpose of repair, berthing, launching, storage, or fueling of small craft and the moorage of floating buildings. 555-2. Application of Other Articles. Wiring and equipment for marinas and boatyards shall comply with this article and also with the applicable provisions of other articles of this Code. (FPN No. 1): See fine print notes following Sections 210-19(a) and 215-2(b) for voltage drop on branch circuits and feeders, respectively. (FPN No. 2): For disconnection of auxiliary power from boats, see Pleasure and Commercial Motor Craft, NFPA 302-1989 (ANSI). 555-3. Receptacles. Where shore power is supplied, those accommodations for boats 20 feet (6.1 m) or less in length shall be equipped with shore-power receptacles of a locking and grounding type rated at not less than 20 amperes. Where shore power is supplied to accommodations for boats longer than 20 feet (6.1 m) in length, shore-power receptacles of a locking and grounding type rated at 30 amperes or more shall be provided. Fifteen- and 20-ampere, single-phase, 125-volt receptacles other than those supplying shore power to boats located at piers, wharfs, and other locations shall be protected by ground-fault circuit-interrupters. (FPN No. 1): For various configurations and ratings of locking- and groundingtype receptacles and caps, see Dimensions of Caps, Plugs, and Receptacles, ANSI C73-1972, and Supplement ANSI C73a-1980. (FPN No. 2): For locking- and grounding-type receptacles for auxiliary power to boats, see Marinas and Boatyards, NFPA 303-1990 (ANSI). (FPN No. 3): In locating receptacles, consideration should be given to the maximum tide level and wave action. See Marinas and Boatyards, NFPA 303-1990 (ANSI), for establishment of datum plane. 555-4. Branch Circuits. Each single receptacle that supplies shore power to boats shall be supplied from a power outlet or panelboard by an individual or multiwire branch circuit of the voltage class and rating corresponding to the rating of the receptacle. 70-630 NATIONAL ELECTRICAL CODE (FPN): Supplying receptacles at voltages other than the voltages marked on the receptacle may cause overheating or malfunctioning of connected equipment; for example, supplying single-phase, 120/240V, 3-wire loads for a 208Y/120V, 3-wire source. 555-5. Feeders and Services. The load for each ungrounded feeder and service conductor supplying receptacles that supply shore power for boats shall be calculated as follows: For 1-4 receptacles 100% of the sum of the rating of the receptacles For 5-8 90% " " " " For 9-14 80% " " " " For 15-30 70% " " " " For 31-40 60% " " " " For 41-50 50% " " " " For 51-70 40% " " " " For 71-100 30% " " " " For 101 plus 20% " " " " (FPN): These demand factors may be inadequate in areas of extreme hot or cold temperature with loaded circuits for heating, air-conditioning, or refrigerating equipment. 555-6. Wiring Methods. The wiring method shall be of a type identified for use in wet locations. Extra-hard usage portable power cable listed for both wet locations and sunlight resistance shall be permitted for a feeder where flexibility is required. Open wiring shall be permitted only by special permission. (FPN No. 1): In granting special permission, major factors include possible contact of open wires with masts, cranes, or similar structures or equipment. (FPN No. 2): For further information on wiring methods for various locations and for establishment of datum plane, see Marinas and Boatyards, NFPA 303-1990 (ANSI). 555-7. Grounding. (a) Equipment to Be Grounded. The following items shall be connected to an equipment grounding conductor run with the circuit conductors in a raceway or cable: (1) Boxes, cabinets, and all other metal chclosures. (2) Metal frames of utilization equipment. (3) Grounding terminals of grounding-type receptacles. (b) Type of Equipment Grounding Conductor. The equipment grounding conductor shall be an insulated copper conductor with a continuous outer finish that is either green or green with one or more yellow stripes. Exception: The equipment grounding conductor of Type MI cable shall be permitted to be identified at terminations. (c) Size of Equipment Grounding Conductor. The insulated copper equipment grounding conductor shall be sized in accordance with Section 250-95 but not smaller than No. 12. ARTICLE 555 - MARINAS AND BOATYARDS 70-631 (d) Branch-Circuit Equipment Grounding Conductor. The insulated equipment grounding conductor for branch circuits shall terminate at a grounding terminal in a remote panelboard or the grounding terminal in the main service equipment. (e) Feeder Equipment Grounding Conductors. Where a feeder supplies a remote panelboard, an insulated equipment grounding conductor shall extend from a grounding terminal in the service equipment to a grounding terminal in the remote panelboard. 555-8. Wiring Over and Under Navigable Water. Wiring over and under navigable water shall be subject to approval by the authority having jurisdiction. 555-9. Gasoline Dispensing Stations - Hazardous (Classified) Locations. Electrical equipment and wiring located in gasoline dispensing stations shall comply with Article 514. (FPN): For further information, see Automotive and Marine Service Station Code, NFPA 30A-1990, and Marinas and Boatyards, NFPA 303-1990 (ANSI). 555-10. Location of Service Equipment. The service equipment for floating docks or marinas shall be located adjacent to, but not on or in, the floating structure. 70-633 Chapter 6. Special Equipment