Bathroom Electrical Code Requirements in Wisconsin: NEC 2020 Guide
Water and electricity don't mix. That's why bathrooms have strict electrical codes. Here's what Wisconsin homeowners need to know for safe, code-compliant bathrooms.
Bathroom Electrical Costs
- • GFCI outlet: $150-$250
- • Exhaust fan install: $250-$500
- • Vanity light: $100-$200
- • Heated floor circuit: $400-$800
- • Full remodel electrical: $1,500-$3,500
Key Bathroom Electrical Requirements
- GFCI on all outlets: Required since 1975, no exceptions
- 20-amp circuit: At least one for bathroom receptacles
- Outlet near sink: Within 3 feet of outside edge of each sink basin
- Wet location fixtures: All lights in tub/shower areas
- No panels in bathrooms: Electrical panels prohibited
Shower/Tub Electrical Zones
NEC defines specific zones around bathtubs and showers where electrical devices are restricted:
Prohibited in Tub/Shower Space:
- • Receptacles (outlets)
- • Switches
- • Standard light fixtures (must be wet-rated if within tub/shower)
Fixtures within tub/shower area must be rated for wet locations and on GFCI protection.
Exhaust Fan Requirements
Wisconsin building code requires mechanical ventilation in bathrooms without operable windows. Even with windows, exhaust fans are recommended for moisture control.
- Fan must vent to outside (not into attic)
- 50 CFM minimum for small bathrooms
- Timer or humidity sensor recommended
- Can share circuit with lighting (not outlets)
Why We Can't Quote Remotely
Bathroom electrical work depends on:
- • Existing wiring (often inadequate in older homes)
- • Attic/crawl space access for fan venting
- • Wall construction for outlet placement
- • Circuit availability at the panel
- • Moisture damage to existing wiring
Related Resources
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