SPS 316.300 Note(1) Electrical requirements for private onsite wastewater treatment systems. These department rules apply to private onsite wastewater treatment systems and are in addition to the requirements of 2011 and 2017 NEC 300:
SPS 316.300(1)(a)(a) Wiring methods. All effluent pump circuit wiring shall comply with the approved wiring methods as specified in NEC 300 and all of the following requirements: SPS 316.300(1)(a)1.1. Effluent pumps shall be supplied by a separate branch circuit supplying no other loads. SPS 316.300(1)(a)3.3. All aboveground cables and flexible cords shall be enclosed to protect against physical damage. SPS 316.300(1)(a)5.5. Where the wiring enclosure for the alarm and pump circuit is located outside the pump chamber, any openings into the pump chamber for circuit wiring shall be sealed or plugged to prevent the passage of gas or vapor into the wiring enclosure. SPS 316.300 NoteNote: This prohibits use of a multi-wire branch circuit to supply both the alarm and pump.
SPS 316.300 NoteNote: See NEC 430.102 for location of disconnects.
SPS 316.300(1)(b)(b) Ground-fault circuit protection. A single receptacle located at the pump chamber that has an alarm or pump connected to it does not require ground-fault circuit-interrupter protection unless recommended or required by the alarm or pump manufacturer. SPS 316.300 NoteNote: Par. (b) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.300 Note(b) Ground-fault circuit protection. A single receptacle located at the pump chamber that has an alarm or pump connected to it does not require ground-fault circuit-interrupter protection.
SPS 316.300(2)(a)(a) The requirements specified in 2011 NEC 300.4 (D) are not included as part of this chapter. SPS 316.300 NoteNote: Par. (a) is repealed eff. 9-1-26 by CR 26-016. SPS 316.300(2)(b)(b) This is a department exception in addition to the exceptions under NEC 300.4 (D): Exception No. 4: This distance does not need to be maintained within 8 inches of a device, junction box, splice, or termination point. SPS 316.300 NoteNote: Par. (b) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.300 Note(b) This is a department exception in addition to the exceptions under 2017 NEC 300.4 (D): Exception No. 4: This distance does not need to be maintained within 8 inches of a device, junction box, splice, or termination point.
SPS 316.300 HistoryHistory: CR 08-047: cr. Register February 2009 No. 638, eff. 3-1-09: CR 13-042: cr. (1) (a) 5. Register November 2013 No. 695, eff. 12-1-13; CR 16-093: am. (1) (title), (intro.), renum. (2) to (2) (a) and am., cr. (2) (b) Register June 2018 No. 750, eff. 8-1-18; CR 26-016: am. (1) (intro.), (b), r. (2) (a), am. (2) (b) Register June 2026 No. 846, eff. 9-1-26. SPS 316.310(1)(1) This is a department rule in addition to the requirements in 2011 NEC 310.15 (B) (3) (a): The derating factors shown in NEC Table 310.15 (B) (3) (a) do not apply to branch circuits supplying an individual dwelling unit except under the following conditions: Exception No. 6: The derating factors shown in NEC Table 310.15 (B) (3) (a) do not apply to branch circuits supplying an individual dwelling unit except under the following conditions: SPS 316.310(1)(a)(a) Where more than two NM cables containing two or more current-carrying conductors are installed, without maintaining spacing between the cables, through the same opening in wood framing that is to be fire- or draft-stopped using thermal insulation, caulk or sealing foam, the allowable ampacity of each conductor shall be adjusted in accordance with Table 310.15 (B) (3) (a) and the provisions of 310.15 (A) (2) shall not apply. SPS 316.310(1)(b)(b) Where more than two NM cables containing two or more current-carrying conductors are installed in contact with thermal insulation without maintaining spacing between cables, the allowable ampacity of each conductor shall be adjusted in accordance with Table 310.15 (B) (3) (a). SPS 316.310 NoteNote: Sub. (1) is repealed eff. 9-1-26 by CR 26-016. SPS 316.310(2)(2) This is a department rule in addition to the requirements in NEC 310.15 (C) (1): The derating factors shown in NEC Table 310.15 (C) (1) do not apply to branch circuits supplying an individual dwelling unit. SPS 316.310 NoteNote: Sub. (2) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.310 Note(2) This is a department rule in addition to the requirements in 2017 NEC 310.15 (B) (3) (a): The derating factors shown in NEC Table 310.15 (B) (3) (a) do not apply to branch circuits supplying an individual dwelling unit.
SPS 316.310 HistoryHistory: CR 08-047: cr. Register February 2009 No. 638, eff. 3-1-09; CR 13-042: am. (title), (intro.) Register November 2013 No. 695, eff. 12-1-13; corrections in (intro.), (1), (2) under s. 13.92 (4) (b) 7. Register November 2013 No. 695; CR 16-093: renum. (intro.) to (1) (intro.), cr. (2) Register June 2018 No. 750, eff. 8-1-18; CR 26-016: r. (1), am. (2) Register June 2026 No. 846, ef. 9-1-26. SPS 316.312SPS 316.312 Cabinets, cutout boxes and meter socket enclosures. SPS 316.312(1)(1) Cables. Substitute the following wording for NEC 312.5 (C) Exception No. 1 (intro.): Exception No. 1: Cables with entirely nonmetallic sheaths may enter an enclosure through one or more nonflexible raceways of not less than 12 inches and not more than 10 feet in length, provided all of the following conditions are met: SPS 316.312 NoteNote: Sub. (1) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.312 Note(1) Cables. Substitute the following wording for 2011 and 2017 NEC 312.5 (C) Exception (intro.): Exception: Cables with entirely nonmetallic sheaths may enter an enclosure through one or more nonflexible raceways of not less than 12 inches and not more than 10 feet in length, provided all of the following conditions are met:
SPS 316.312(2)(2) Omission. The requirements specified in NEC 312.5 (C) Exception No. 1 sub. (2) are not included as part of this chapter. SPS 316.312 NoteNote: Sub. (2) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.312 Note(2) Omission. The requirements specified in 2011 NEC 312.5 (C) Exception paragraph (b) and 2017 NEC 312.5 (C) Exception number 2 are not included as part of this chapter.
SPS 316.312(3)(3) Fitting. Substitute the following wording for NEC 312.5 (C) Exception No. 1 sub. (3): A fitting is provided on each end of the raceway to protect the cable from abrasion. SPS 316.312 NoteNote: Sub. (3) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.312 Note(3) Fitting. Substitute the following wording for 2011 NEC 312.5 (C) Exception paragraph (c) and 2017 NEC 312.5 (C) Exception number 3: A fitting is provided on each end of the raceway to protect the cable from abrasion.
SPS 316.314SPS 316.314 Outlet, device, pull and junction boxes; conduit bodies; fittings; and handhole enclosures. SPS 316.314(1)(1) Conductors entering boxes, conduit bodies, or fittings. This is a department exception to the requirements of NEC 314.17 (B): Exception: Nonmetallic sheathed cable is not required to be secured to the enclosure or conduit body where it is installed in accordance with s. SPS 316.312. SPS 316.314 NoteNote: Sub. (1) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.314 Note(1) Conductors entering boxes, conduit bodies, or fittings. This is a department exception to the requirements of 2011 and 2017 NEC 314.17 (B) and (C): Exception: Nonmetallic sheathed cable is not required to be secured to the box or conduit body where it is installed in accordance with the wiring method specified in s. SPS 316.312. SPS 316.314(2)(2) Outlet boxes. This is a department rule in addition to the requirements of 2011 NEC 314.27 (A): In a dwelling unit, a ceiling outlet box installed for use as a lighting fixture outlet in a habitable room or kitchen and located where a ceiling fan could be installed shall be a type listed for ceiling fan support. SPS 316.314 NoteNote: Sub. (2) is repealed eff. 9-1-26 by CR 26-016. SPS 316.334SPS 316.334 Nonmetallic-sheathed cable: Types NM and NMC. SPS 316.334(1)(1) Uses permitted. Substitute the following wording for NEC 334.10 (3): Other structures permitted to be of Types III, IV, and V construction except as prohibited in NEC 334.12. SPS 316.334 NoteNote: SPS 316.334 (title) and (1) are shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 they read: SPS 316.334 NoteSPS 316.334 Nonmetallic-sheathed cable: Types NM, NMC and NMS. (1) Uses permitted. Substitute the following wording for 2011 and 2017 NEC 334.10 (3): Other structures permitted to be of Types III, IV, and V construction except as prohibited in NEC 334.12.
SPS 316.334(2)(2) Types NM and NMC. The requirements specified in NEC 334.12 (A) (2) are not included as part of this chapter. SPS 316.334 NoteNote: Sub. (2) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.334 Note(2) Types NM, NMC, and NMS. The requirements specified in 2011 and 2017 NEC 334.12 (A) (2) are not included as part of this chapter.
SPS 316.358SPS 316.358 Uses permitted. This is a department rule in addition to the requirements of 2011 and 2017 NEC 358.12: Electrical metallic tubing may not be used in direct contact with earth, in concrete slabs or floors poured on earth, or in exterior concrete walls below grade. SPS 316.358 NoteNote: This section is repealed eff. 9-1-26 by CR 26-016. SPS 316.400SPS 316.400 Flexible cords and cables. Substitute the following wording for the exception in NEC 400.12 (4): Exception: Flexible cord and flexible cable may be attached to building surfaces for a use permitted under NEC 400.10 (A) if all of the following apply: SPS 316.400(3)(3) The type of cable and attachment to the building, the equipment, and the support comply with the provisions of NEC 368.56 (B) and 590.4. SPS 316.400 NoteNote: This section is shown as repealed and recreated eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.400 NoteSPS 316.400 Flexible cords and cables. (1) This is a department exception in addition to the exception in 2011 NEC 400.8 (4): Exception No. 2: Flexible cords and cables permitted by NEC 400.7 (A) that are connected to sources other than busways may be attached to adequately supported equipment or building surfaces provided the type of cord or cable, the attachment to the building and equipment, and the support comply with the provisions of NEC 368.56 (B).
SPS 316.400 Note(2) This is a department exception in addition to the exception in 2017 NEC 400.12 (4): Exception No. 2: Flexible cords and cables permitted by NEC 400.10 (A) that are connected to sources other than busways may be attached to adequately supported equipment or building surfaces provided the type of cord or cable, the attachment to the building and equipment, and the support comply with the provisions of NEC 368.56 (B).
SPS 316.400 HistoryHistory: CR 08-047: cr. Register February 2009 No. 638, eff. 3-1-09; CR 13-042: am. (title) Register November 2013 No. 695, eff. 12-1-13; CR 16-093: renum. SPS 316.400 to (1) and am., cr. (2) Register June 2018 No. 750, eff. 8-1-18; CR 26-016: r. and recr. Register June 2026 No. 846, eff. 9-1-26. SPS 316.404SPS 316.404 Switches controlling lighting loads. The requirements in 2017 NEC 404.2 (C) do not apply to dwelling units. SPS 316.404 NoteNote: This section is repealed eff. 9-1-26 by CR 26-016. SPS 316.406SPS 316.406 Receptacles, cord connectors and attachment plugs (caps). SPS 316.406(1)(1) Arc-fault circuit-interrupter protection. The requirements in NEC 406.4 (D) (4) are not included as part of this chapter. SPS 316.406 NoteNote: Sub. (1) is shown as amended eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.406 Note(1) The requirements in 2011 and 2017 NEC 406.4 (D) (4) are not included as part of this chapter.
SPS 316.406(2)(2) Bathtub and shower space. Substitute the following wording for NEC 406.9 (C): Receptacles shall not be installed within or directly over a bathtub or shower stall. Exception: Weight supporting ceiling receptacles (WSCR) shall be permitted to be installed for listed luminaires that employ a weight supporting attachment fitting (WSAF) in damp locations complying with NEC 410.10 (D). SPS 316.406 NoteNote: See NEC 210.8 (A) (1) for GFCI requirements in a bathroom.
SPS 316.406 NoteNote: See NEC 210.11 (C) for requirements for bathroom branch circuits.
SPS 316.406 NoteNote: Sub. (2) is shown as repealed and recreated eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.406 Note(2) Substitute the following wording for 2017 NEC 406.9 (B) (1): Receptacles of 15 and 20 amperes, 125 and 250 volts installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted.
SPS 316.406 HistoryHistory: CR 08-047: cr. Register February 2009 No. 638, eff. 3-1-09; CR 13-042: Register November 2013 No. 695, eff. 12-1-13; CR 16-093: renum. SPS 316.406 to (1) and am., cr. (2) Register June 2018 No. 750, eff. 8-1-18; CR 26-016: cr. (1) (title), am. (1), r. and recr. (2) Register June 2026 No. 846, eff. 9-1-26. SPS 316.450SPS 316.450 Transformers and transformer vaults (including secondary ties), location. Substitute the following wording for NEC 450.41: Vaults containing oil-insulated transformers shall be located where the vaults can be ventilated to the outside air without using flues or ducts, except where a petition for variance is approved. SPS 316.450 NoteNote: This section is shown as repealed and recreated eff. 9-1-26 by CR 26-016. Prior to 9-1-26 it reads: SPS 316.450 NoteSPS 316.450 Transformers and transformer vaults (including secondary ties). (1) Overcurrent protection. This is a department rule in addition to the requirements in 2011 and 2017 NEC Table 450.3 (A) Note 3: The qualified person shall be either an employee at that location or an employee contracted for this purpose who is readily available.
SPS 316.450 Note(2) Location. Substitute the following wording for 2011 and 2017 NEC 450.41: Vaults containing oil-insulated transformers shall be located where the vaults can be ventilated to the outside air without using flues or ducts, except where a petition for variance is approved.
SPS 316.511SPS 316.511 Commercial garages, repair and storage. SPS 316.511(1)(1) The requirements specified in 2011 NEC 511.3 (C) (1) (a) are not included as part of this chapter. SPS 316.511(2)(2) Substitute the following wording for 2011 NEC 511.3 (C) (2) (a): The ceiling area shall be unclassified where ventilation is provided from a point not more than 18 inches from the highest point in the ceiling. The ventilation shall conform to chs. SPS 361 to 366. SPS 316.511 NoteNote: The Commercial Building Code, chapters SPS 361 to 366, adopts and references the International Mechanical Code, IMC, for the design of ventilation systems. The adopted provisions of the International Mechanical Code under section 502.16 prescribe provisions for repair garages for natural gas- and hydrogen- fueled vehicles.
SPS 316.511(3)(3) Substitute the following wording for “Extent of Classified Location” in 2017 NEC Table 511.3 (C) under which the floor area of a major repair garage is considered unclassified: Up to 450 mm (18 in.) above floor level of the room where the room is provided with ventilation from a point not more than 300 mm (12 in.) from the lowest point of the floor area and the ventilation conforms to chs. SPS 361 to 366. SPS 316.511(4)(4) Substitute the following wording for “Extent of Classified Location” in 2017 NEC Table 511.3 (D) under which the ceiling area of a major repair garage is considered unclassified: Within 450 mm (18 in.) of ceiling where ventilation is provided from a point not more than 450 mm (18 in.) from the highest point in the ceiling and the ventilation conforms to chs. SPS 361 to 366.
