Common Electrical Code Violations in Wisconsin: Complete Guide

Electrical codes exist to prevent fires and electrocutions. Wisconsin follows the NEC 2020 through Administrative Code SPS 316. Here are the violations we see most often—and how to fix them.

Wisconsin Electrical Code Framework

  • • NEC 2020: National Electrical Code (technical requirements)
  • • SPS 316: Wisconsin Administrative Code (adoption + state modifications)
  • • Local amendments: Some municipalities have additional requirements

Most Common Violations

1. Missing GFCI Protection

Required in bathrooms (since 1975), kitchens (1987), garages, outdoor areas, and more. Many older homes lack GFCI where it's now required. Easy fix: $150-$250 per location.

2. Improper Grounding

Missing ground rods, improper bonding, or "bootleg grounds" (connecting neutral to ground at outlets). Creates shock hazards and prevents breakers from working properly.

3. Overcrowded Boxes

NEC limits how many wires can fit in an electrical box based on size. Overstuffed boxes cause overheating and make connections unreliable. Common in DIY additions.

4. Double-Tapped Breakers

Two wires under one breaker terminal (unless breaker is rated for it). Creates loose connections that can arc and overheat. Often from DIY circuit additions.

5. Missing Junction Box Covers

Every junction box must have a cover. Open boxes in attics, basements, and garages are common. Easy fix but often overlooked. Required to contain any arcing.

6. Extension Cords as Permanent Wiring

Extension cords are for temporary use only. Running them through walls, under carpets, or as permanent solutions is a fire hazard and code violation.

Penalties for Code Violations

  • Unpermitted work: Double permit fees + up to $500 penalty
  • Failed inspection: Re-inspection fee after corrections
  • Insurance issues: Claims may be denied if violations contributed to loss
  • Sale complications: Buyers may require corrections before closing

Why We Can't Quote Corrections Remotely

Code violations vary dramatically in scope:

  • • "Missing GFCI" could be one outlet or twelve
  • • "Improper grounding" ranges from simple fixes to major rewiring
  • • One violation often reveals others when we start work
  • • Access conditions affect labor time significantly

Bring us the inspection report and we'll provide an accurate correction estimate.

Related Resources

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