Resolución 2535: adopta el Código Eléctrico Nacional, versión 1993. (Sustituye el Anejo A del Reglamento 4435)

(FPN): In determining the above dimensions, the distance to be measured is the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, doorway with hinged or sliding door, window opening, or other effective permanent barrier. (b) Lighting Fixtures, Lighting Outlets, and Ceiling Fans. (1) Lighting fixtures, lighting outlets, and ceiling fans shall not be installed over the pool or over the area extending 5 feet (1.52 m) horizontally from the inside walls of a pool unless no part of the lighting fixture or ceiling fan is less than 12 feet (3.66 m) above the maximum water level. Exception No. 1: Existing lighting fixtures and lighting outlets located less than 5 feet (1.52 m) measured horizontally from the inside walls of a pool shall be at least 5 feet (1.52 m) above the surface of the maximum water level and shall be rigidly attached to the existing structure. Exception No. 2: In indoor pool areas, the limitations of Section 680-6(b)(1) shall not apply if all of the following conditions are complied with: (1) fixtures are of totally enclosed type; (2) a ground-fault circuitinterrupter is installed in the branch circuit supplying the fixture(s) or ceiling fans; and (3) the distance from the bottom of the fixture or ceiling fan to the maximum water level is not less than 7.5 feet (2.29 m). (2) Lighting fixtures and lighting outlets installed in the area extending between 5 feet (1.52 m) and 10 feet (3.05 m) horizontally from the inside walls of a pool shall be protected by a ground-fault circuit-interrupter unless installed 5 feet (1.52 m) above the maximum water level and rigidly attached to the structure adjacent to or enclosing the pool. (3) Cord-connected lighting fixtures shall meet the same specifications as other cord- and plug-connected equipment as set forth in Section 680-7 where installed within 16 feet (4.88 m) of any point on the water surface, measured radially. (c) Switching Devices. Switching devices on the property shall be located at least 5 feet (1.52 m) horizontally from the inside walls of a pool unless separated from the pool by a solid fence, wall, or other permanent barrier. 680-7. Cord- and Plug-Connected Equipment. Fixed or stationary equipment rated 20 amperes or less, other than an underwater lighting fixture for a permanently installed pool, shall be permitted to be connected with a flexible cord to facilitate the removal or disconnection for maintenance or repair. For other than storable pools, the flexible cord shall not exceed 3 feet (914 mm) in length and shall have a copper equipment grounding conductor not smaller than No. 12 with a grounding-type attachment plug. (FPN): See Section 680-25(e) for connection with flexible cords. 70-698 NATIONAL ELECTRICAL CODE 680-8. Overhead Conductor Clearances. The following parts of pools shall not be placed under existing service-drop conductors or any other open overhead wiring; nor shall such wiring be installed above the following: (1) pools and the area extending 10 feet (3.05 m) horizontally from the inside of the walls of the pool; (2) diving structure; or (3) observation stands, towers, or platforms. Exception No. 1: Structures listed in items (1), (2), and (3) above shall be permitted under supply lines or service drops where such installations provide the following clearances: Insulated supply or service All other supply or service drop cables, 0-750 volts drop conductors to ground, supported on and cabled together with an effec- Voltage to Ground tively grounded bare messenger or effectively grounded greater than neutral conductor 0-15 kV 15 to 50kV A. Clearance in any direction to the water level, edge of water surface, base of diving platform, or permanently- 18 feet 25 feet 27 feet anchored raft (5.49 m) (7.62 m) (8.23 m) B. Clearance in any direction to the diving platform or 14 feet 16 feet 18 feet tower (4.27 m) (4.88 m) (5.49 m) C. Horizontal limit of clearance measured This limit shall extend to the outer edge of the from inside wall of structures listed in (1) and (2) above but not less the pool than 10 feet (3.05 m). B B B B A B A Observation stand C C Pool Figure 680-8, Exception No. 1 ARTICLE 680 - SWIMMING POOLS, FOUNTAINS 70-699 Exception No. 2: Utility-owned, -operated, and -maintained communication conductors, community antenna system coaxial cables complying with Article 820, and the supporting messengers shall be permitted at a height of not less than 10 feet (3.05 m) above swimming and wading pools, diving structures, and observation stands, towers, or platforms. (FPN): See Sections 225-18 and 225-19 for clearances for conductors not covered by this section. 680-9. Electric Pool Water Heaters. All electric pool water heaters shall have the heating elements subdivided into loads not exceeding 48 amperes and protected at not more than 60 amperes. The ampacity of the branch-circuit conductors and the rating or setting of overcurrent protective devices shall not be less than 125 percent of the total load of the nameplate rating. 680-10. Underground Wiring Location. Underground wiring shall not be permitted under the pool or within the area extending 5 feet (1.52 m) horizontally from the inside wall of the pool. Exception No. 1: Wiring necessary to supply pool equipment permitted by this article shall be allowed within this area. Exception No. 2: Where space limitations prevent wiring from being routed 5 feet (1.52 m) or more from the pool, such wiring shall be permitted where installed in rigid metal conduit, intermediate metal conduit, or a nonmetallic raceway system. All metal conduit shall be corrosion-resistant and suitable for the location. The minimum burial depth shall be as follows: Minimum Burial Wiring Method (inches) Rigid Metal Conduit 6 Intermediate Metal Conduit 6 Rigid Nonmetallic Conduit Approved for Direct Burial without Concrete Encasement 18 Other Approved Raceways* 18 For SI units: one inch = 25.4 millimeters *Note: Raceways approved for burial only where concrete-encased shall require a concrete envelope not less than 2 inches (50.8 mm) thick. 680-11. Equipment Rooms and Pits. Electric equipment shall not be installed in rooms or pits that do not have adequate drainage to prevent water accumulation during normal operation or filter maintenance. B. Permanently Installed Pools 680-20. Underwater Lighting Fixtures. Paragraphs (a) through (d) of this section apply to all lighting fixtures installed below the normal water level of the pool. 70-700 NATIONAL ELECTRICAL CODE (a) General. (1) The design of an underwater lighting fixture supplied from a branch circuit either directly or by way of a transformer meeting the requirements of Section 680-5(a) shall be such that, where the fixture is properly installed without a ground-fault circuit-interrupter, there is no shock hazard with any likely combination of fault conditions during normal use (not relamping). In addition, a ground-fault circuit-interrupter shall be installed in the branch circuit supplying fixtures operating at more than 15 volts, so that there is no shock hazard during relamping. The installation of the groundfault circuit-interrupter shall be such that there is no shock hazard with any likely fault-condition combination that involves a person in a conductive path from any ungrounded part of the branch circuit or the fixture to ground. Compliance with this requirement shall be obtained by the use of an approved underwater lighting fixture and by installation of an approved ground-fault circuit-interrupter in the branch circuit. (2) No lighting fixtures shall be installed for operation on supply circuits over 150 volts between conductors. (3) Lighting fixtures mounted in walls shall be installed with the top of the fixture lens at least 18 inches (457 mm) below the normal water level of the pool. A lighting fixture facing upward shall have the lens adequately guarded to prevent contact by any person. Exception: Lighting fixtures identified for use at a depth of not less than 4 inches (102 mm) below the normal water level of the pool shall be permitted. (4) Fixtures that depend on submersion for safe operation shall be inherently protected against the hazards of overheating when not submerged. (b) Wet-Niche Fixtures. (1) Forming shells shall be installed for the mounting of all wet-niche underwater fixtures and shall be equipped with provisions for conduit entries. Conduit shall extend from the forming shell to a suitable junction box or other enclosure located as provided in Section 680-21. Conduit shall be rigid metal, intermediate metal, or rigid nonmetallic. Metal conduit shall be of brass or other approved corrosion-resistant metal. Where rigid nonmetallic conduit is used, a No. 8 insulated copper conductor shall be installed in this conduit with provisions for terminating in the forming shell, junction box or transformer enclosure, or ground-fault circuit-interrupter enclosure. The termination of the No. 8 conductor in the forming shell shall be covered with, or encapsulated in, a listed potting compound to protect such connection from the possible deteriorating effect of pool water. Metal parts of the fixture and forming shell in contact with the pool water shall be of brass or other approved corrosion-resistant metal. ARTICLE 680 - SWIMMING POOLS, FOUNTAINS 70-701 (2) The end of the flexible-cord jacket and the flexible-cord conductor terminations within a fixture shall be covered with, or encapsulated in, a suitable potting compound to prevent the entry of water into the fixture through the cord or its conductors. In addition, the grounding connection within a fixture shall be similarly treated to protect such connection from the deteriorating effect of pool water in the event of water entry into the fixture. (3) The fixture shall be bonded to and secured to the forming shell by a positive locking device that assures a low-resistance contact and requires a tool to remove the fixture from the forming shell. (c) Dry-Niche Fixtures. A dry-niche lighting fixture shall be provided with (1) provision for drainage of water and (2) means for accommodating one equipment grounding conductor for each conduit entry. Approved rigid metal conduit, intermediate metal conduit, or rigid nonmetallic conduit shall be installed from the fixture to the service equipment or panelboard. A junction box shall not be required but, if used, shall not be required to be elevated or located as specified in Section 680-21(a)(4) if the fixture is specifically identified for the purpose. Exception: Electrical metallic tubing shall be permitted to be used to protect conductors where installed on or within buildings. (d) No-Niche Fixtures. A no-niche fixture shall: (1) Be listed for the purpose. (2) Be installed in accordance with the requirements of Section 680-20(b). Where connection to a forming shell is specified, the connection shall be to the mounting bracket. 680-21. Junction Boxes and Enclosures for Transformers or Ground- Fault Circuit-Interrupters. (a) Junction Boxes. A junction box connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche fixture shall be: (1) Equipped with threaded hubs or bosses or a nonmetallic hub listed for the purpose; and (2) Of copper, brass, suitable plastic, or other approved corrosionresistant material; and (3) Provided with electrical continuity between every connected metal conduit and the grounding terminals by means of copper, brass, or other approved corrosion-resistant metal that is integral with the box; and (4) Located not less than 4 inches (102 mm), measured from the inside of the bottom of the box, above the ground level, or pool deck, or not less than 8 inches (203 mm) above the maximum pool water level, whichever provides the greatest elevation, and located not less than 4 feet (1.22 m) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier. 70-702 NATIONAL ELECTRICAL CODE Exception: On lighting systems of 15 volts or less, a flush deck box shall be permitted provided: a. An approved potting compound is used to fill the box to prevent the entrance of moisture; and b. The flush deck box is located not less than 4 feet (1.22 m) from the inside wall of the pool. (b) Other Enclosures. An enclosure for a transformer, ground-fault circuit-interrupter, or a similar device connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche fixture shall be: (1) Equipped with threaded hubs or bosses or a nonmetallic hub listed for the purpose; and (2) Provided with an approved seal, such as duct seal at the conduit connection, that prevents circulation of air between the conduit and the enclosures; and (3) Provided with electrical continuity between every connected metal conduit and the grounding terminals by means of copper, brass, or other approved corrosion-resistant metal that is integral with the enclosures; and (4) Located not less than 4 inches (102 mm), measured from the inside bottom of the enclosure, above the ground level or pool deck, or not less than 8 inches (203 mm) above the maximum pool water level, whichever provides the greater elevation, and located not less than 4 feet (1.22 mm) from the inside wall of the pool, unless separated from the pool by a solid fence, wall, or other permanent barrier. (c) Protection. Junction boxes and enclosures mounted above the grade of the finished walkway around the pool shall not be located in the walkway unless afforded additional protection, such as by location under diving boards, adjacent to fixed structures, and the like. (d) Grounding Terminals. Junction boxes, transformer enclosures, and ground-fault circuit-interrupter enclosures connected to a conduit that extends directly to a forming shell or mounting bracket of a no-niche fixture shall be provided with a number of grounding terminals that shall be at least one more than the number of conduit entries. (e) Strain Relief. The termination of a flexible cord of an underwater lighting fixture within a junction box, transformer enclosure, ground-fault circuit-interrupter, or other enclosure shall be provided with a strain relief. 680-22. Bonding. (FPN): It is not the intent of this subsection to require that the No. 8 or larger solid copper bonding conductor be extended or attached to any remote panelboard, service equipment, or any electrode, but only that it be employed to eliminate voltage gradients in the pool area as prescribed. (a) Bonded Parts. The following parts shall be bonded together: (1) All metallic parts of the pool structure, including the reinforcing metal of the pool shell, coping stones, and deck. (2) All forming shells and mounting brackets of a no-niche fixture. (3) All metal fittings within or attached to the pool structure. ARTICLE 680 - SWIMMING POOLS, FOUNTAINS 70-703 (4) Metal parts of electric equipment associated with the pool water circulating system, including pump motors. (5) Metal parts of equipment associated with pool covers, including electric motors. (6) Metal-sheathed cables and raceways, metal piping, and all fixed metal parts that are within 5 feet (1.52 m) horizontally of the inside walls of the pool, and within 12 feet (3.66 m) above the maximum water level of the pool, or any observation stands, towers, or platforms, or from any diving structures, and that are not separated from the pool by a permanent barrier. Exception No. 1: The usual steel tie wires shall be considered suitable for bonding the reinforcing steel together, and welding or special clamping shall not be required. These tie wires shall be made tight. Exception No. 2: Isolated parts that are not over 4 inches (102 mm) in any dimension and do not penetrate into the pool structure more than 1 inch (25.4 mm) shall not require bonding. Exception No. 3: Structural reinforcing steel or the walls of bolted or welded metal pool structures shall be permitted as a common bonding grid for nonelectrical parts where connections can be made in accordance with