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Section E4202 Wiring Methods for Pools, Spas, Hot Tubs and Hydromassage Bathtubs
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Wiring methods used in conjunction with permanently installed swimming pools, spas or hot tubs that are installed in corrosive environments described in Section E4202.2.1 shall comply with Table E4202.1, Sections E4202.2 and E4205 and Chapter 38 except as otherwise stated in this section. Wiring methods used in conjunction with permanently installed swimming pools, spas or hot tubs that are not installed in corrosive environments shall comply with Chapter 38. Storable swimming pools shall comply with Section E4207. Hydromassage bathtubs shall comply with Section E4209. [680.7; 680.14 (A) and (B); 680.21(A); 680.23(B) and (F); 680.25(A); 680.42; 680.43; and 680.70]
PERMITTED WIRING METHODS IN CORROSIVE ENVIRONMENTS
| WIRING LOCATION OR PURPOSE (Application allowed where marked with an "A") | IMCb, RMCb, RNCe | LFMC | LFNMC | MCg | FLEX CORD |
| Panelboard(s) that supply pool equipment: from service equipment to panelboard | Af | — | A | — | — |
| Wet-niche and no-niche luminaires: from branch circuit OCPD to deck or junction box | A | — | A | — | — |
| Wet-niche and no-niche luminaires: from deck or junction box to forming shell | Aj | — | A | — | Ad |
| Dry niche: from branch circuit OCPD to luminaires | A | — | A | — | — |
| Pool-associated motors: from branch circuit OCPD to motorh | A | Ac | Ac | A | Ad |
| Packaged or self-contained outdoor spas and hot tubs with underwater luminaire: from branch circuit OCPD to spa or hot tub | A | A | A | — | Ad |
| Packaged or self-contained outdoor spas and hot tubs without underwater luminaire: from branch circuit OCPD to spa or hot tub | A | A | A | — | Ad |
| Indoor spas and hot tubs, and other pool, spa or hot tub associated equipment: from branch circuit OCPD to equipment | A | A | A | — | Ad |
| Connection at pool lighting transformers or power supplies | A | Ai | A | — | — |
For SI: 1 foot = 304.8 mm.
- For all wiring methods, see Section E4205 for equipment grounding conductor requirements.
- See Section E4202.2.1 for use of metal conduits in corrosive environments.
- Limited to where necessary to employ flexible connections at or adjacent to a pool motor.
- Flexible cord shall be installed in accordance with Section E4202.2.
- Nonmetallic conduit shall be rigid polyvinyl chloride conduit Type PVC or reinforced thermosetting resin conduit Type RTRC.
- Aluminum conduits shall not be permitted in the pool area where subject to corrosion.
- Where installed as direct burial cable or in wet locations, Type MC cable shall be listed and identified for the location.
- See Section E4202.3 for listed, double-insulated pool pump motors.
- Limited to use in individual lengths not to exceed 6 feet. The total length of all individual runs of LFMC shall not exceed 10 feet.
- Metal conduit shall be constructed of brass or other approved corrosion-resistant metal.
Areas where pool sanitation chemicals are stored, areas with circulation pumps, automatic chlorinators or filters, open areas under decks adjacent to or abutting the pool structure and similar locations shall be considered to be corrosive environments. The air in such areas shall be considered to be laden with acid, chlorine and bromine vapors or any combination of acid, chlorine or bromine vapors; and any liquids or condensation in those areas shall be considered to be laden with acids, chlorine and bromine vapors, or any combination of acid, chlorine or bromine vapors. [680.14 (A)]
Wiring methods in the areas described in Section E4202.2 shall be listed and identified for use is such areas. Rigid metal conduit (RMC), intermediate metal conduit (IMC), rigid polyvinyl chloride conduit (RNC) and reinforced thermosetting resin conduit shall be considered to be resistant to the corrosive environment specified in Section E4202.2. [680.14 (B)]
Flexible cords used in conjunction with a pool, spa, hot tub or hydromassage bathtub shall be installed in accordance with the following:
- For other than underwater luminaires, fixed or stationary equipment shall be permitted to be connected with a flexible cord to facilitate removal or disconnection for maintenance or repair. For other than storable pools, the flexible cord shall not exceed 3 feet (914 mm) in length. Cords that supply swimming pool equipment shall have a copper equipment grounding conductor not smaller than 12 AWG and shall terminate in a grounding-type attachment plug. [680.8(A), (B), and (C); 680.21(A)(5)]
- Other than listed low-voltage lighting systems not requiring grounding, wet-niche luminaires that are supplied by a flexible cord or cable shall have all exposed noncurrent-carrying metal parts grounded by an insulated copper equipment grounding conductor that is an integral part of the cord or cable. Such grounding conductor shall be connected to a grounding terminal in the supply junction box, transformer enclosure, or other enclosure and shall be not smaller than the supply conductors and not smaller than 16 AWG. [680.23(B)(3)]
- A listed packaged spa or hot tub installed outdoors that is GFCI protected shall be permitted to be cord-and-plug-connected provided that such cord does not exceed 15 feet (4572 mm) in length. [680.42(A)(2)]
- A listed packaged spa or hot tub rated at 20 amperes or less and installed indoors shall be permitted to be cord-and-plug-connected to facilitate maintenance and repair. (680.43 Exception No. 1)
- For other than underwater and storable pool lighting luminaire, the requirements of Item 1 shall apply to any cord-equipped luminaire that is located within 16 feet (4877 mm) radially from any point on the water surface. [680.22(B)(5)]
A listed cord- and plug-connected pool pump incorporating an approved system of double insulation that provides a means for grounding only the internal and nonaccessible, noncurrent-carrying metal parts of the pump shall be connected to any wiring method recognized in Chapter 38 that is suitable for the location. Where the bonding grid is connected to the equipment grounding conductor of the motor circuit in accordance with Section E4204.2, Item 6.1, the branch circuit wiring shall comply with Sections E4202.1 and E4205.5. [680.21(B)]
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