Marcia Hultman

Cabinet Secretary

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South Dakota Electrical Commission

Tool Box - Resources for Electricians

Machinery Policy

Calculators and Mobile App Links

National Electrical Code Guidance

Common Violations

Thermal Barrier Reference Document

Grounding Electrode Systems

Changing Services

Machinery Policy

Machinery Policy

Machinery Designation Application

Calculators and Mobile App Links

Available Fault Current Calculator Mobile App (from Cooper Bussman)

Free resources from Mike Holt

Code Guidance

The following are provided as a courtesy because they are commonly referenced electrical wiring codes from South Dakota Codified Law (SDCL) and National Electrical Codes.

  • 110.11 Structure status before a RI will be conducted:
    • Windows/Doors installed or openings enclosed with plywood, tarps or Tyvek.
    • Structure wrapped in Tyvek or similar material.
    • Shingles, tin, steel, or other permanent roofing material installed (tar paper does not satisfy this requirement).
    • Soffits installed or soffit area enclosed.

    Note: Entire installation is required to be visible at time of rough in inspection unless previous arrangements have been made with inspector prior to inspection. (Note: Installations will not receive rough in inspected approval if covered with insulation, foam and/or finishing materials.)
    Note: Enclosures for windows, doors and soffits which protect the installation from the elements are acceptable.

    Approved roofing underlayment as of Aug. 3, 2020:
          1. Frost Guard self-adhesive
          2. LeakBarrier PS200 Ice and Water Armor
          3. Grace Ice and Water Shield
          4. The Zip system
          5. Atlas WeatherMaster Ice and Water
          6. Titanium UDL 30

    Please note the approved methods will be denied when installed outside of the temperature requirements per the listing.

  • 110.21 Markings – approved for utilization
    • Indoors – Vinyl, engraved, paper.
    • Outdoors – Vinyl and engraved.
  • 110.26 (C)(2) – Installers are required to comply with the large equipment requirements when the new equipment added to the existing equipment meets the threshold.
    • The 6-foot rule includes the width of the equipment plus any space in between.
    • Door openings cannot hinder your exit. The minimum space between any extended portion of the equipment is required to be 24” from any extended portion of adjacent equipment or other structure.
  • 210.8(A)(5) Define basement – Any portion of given level with a floor in direct contact with the earth is below grade level.
  • 210.8 (A)(11) mud room entrances and front doors – Drain is damp
  • 210.52 & 20:44:22:23 If the back of a cabinet(s) is butted up to a studded wall, it is not considered an island or peninsula. Therefore the requirements in 210.52 pertain. (Note: recommend to install a circuit to be available for future utilization where not required.)
  • 210.8 GFCI and AFCI receptacles in cabinets are considered readily acceptable unless behind an appliance.
  • 210.8 (A)(10) - Guidance is to treat washing machine like a sink in a laundry area.
  • 210.8 (B) & 551.71 F 30 and 50 amp GFCI on pedestals – No GFCI required for residential, RV park (two or more), farmstead
  • 210.12, Art. 100 and 90.4 - Specialty resort installations containing the 4 elements of a dwelling unit will be required to utilize AFCIs. (Permanent provisions for living, sleeping, cooking and sanitation).
  • 210.12 20 amp 120 volt laundry outlets in an unfinished area are required to be AFCI protected.
  • 210.12 (A) - AFCI is not required for 120V furnace circuit.
  • 210.12 (A) - Outlets or devices which would include switches are required to be AFCI protected.
  • 210.23 (A)(2) - Please note manufacturer’s instructions for appliances and/or the 50 percent rule may require an appliance circuit to be dedicated.
  • 210.52 (A)(2)(1) – Outlets below the work surface satisfy the wall space requirement.
  • 250.52 Concrete encased electrode - required to be connected to foundation or footing. Any installation which does not have the ufer connection readily available at time of inspection will be required to supplement with a ground rod.
  • 314.27 (C) Fan box is required for all boxes in excess of 3 feet from any wall in habitable rooms.
  • 334.30 Requires the wiring to be located on the face of the roof truss in unfinished pole barns.
  • 400.10, 400.12, 422.31 (B) Dryer cords are not an allowable method for water heater disconnects as the disconnect is not properly grounded.
  • 445.13 - The exception clarifies generators with breakers can be derated at 100 percent.
  • 517 Chiropractor Office – Human medical would include chiropractor, eye
  • 590 - All temporary power receptacles require GFCI protection.
  • 680.42 (C) The 2017 NEC now allows NM cable to be installed between the service panel and the breakers disconnect for the outdoor hot tub.
  • 702.4B2 - Utilize this article when sizing a generator utilizing an automatic transfer switch.
  • Shunt trip breakers for "Machine Roomless" passenger elevators may be located in the elevator or in the building machine room
  • Mini-split cable EC or HVAC installer – HVAC may install (listed assembly) yet required to follow manufacturer’s instructions
  • GFCI Maximum Height — All GFCIs are required to be readily accessible at a maximum height of 6 foot 7 inches.


Common Violations

  • Wiring Bulletin - Grounding electrode conductor must terminate at the neutral bar in the service.
  • NEC 110.24 requires service equipment in other than dwelling units to have the available fault current labeled. The label shall have the date the calculation was figured and shall be able to withstand the environment involved.
  • Size over current protection per name plate on equipment. Example: air conditioner.
  • NEC 406 Install weather resistant receptacles.
  • NEC 408.4 - Labeling breakers


Changing Services

  • Current service locations are not grandfathered
  • 110.26 – Access and working space shall be provided and maintained about all electrical equipment to permit ready and safe operation and maintenance of equipment.
  • 210.12 If circuits are modified, replaced or extended over six feet, AFCI protection is required.
  • 230.85 Disconnect is required on a service change out.
    • A meter replacement is not considered altering the load side.
    • A disconnect may be before or after the meter.
    • A utility disconnect does satisfy the requirement.
      • Required to be on site of installation
      • Required to be within a line of sight of the structure at time of installation
      • Note: line of sight does not limit the number of feet from structure.
  • S.D. Wiring Bulletin - Service conductors extending over five feet in a building could be run in rigid metal conduit up to 15 feet.
  • 240.24(f) Services cannot be located in stairways, bathrooms, clothes closets, etc.

Documentation of Rough in Process

  • Rough in inspection with corrections – yellow sticker
  • Rough in inspection approved – adhere blue sticker. (Yellow sticker removed or blue sticker adhered over yellow sticker.)