Quick Hits

Episode 3: Space-Heating Cables & Radiant Panels (424.34 – 424.48)

SLIDE 1 (HOOK / COVER)

⚡ NEC Quick Hit: Heating Cables & Radiant Panels (Part 3) ⚡

7-foot nonheating leads, closet cable restrictions, floor GFCI mandates, and wall cable rules—let's review Sections 424.34 through 424.48! 👇

SLIDE 2 (HEATING CABLE INSTALLATIONS)

Ceilings, Floors and Walls:

• Nonheating Leads: Factory-assembled nonheating leads of heating cables must be at least 2.1 m (7 ft) in length.

• Uses Not Permitted: Heating cables cannot be installed in closets (except for relative humidity control), over wall/ceiling intersections, in tub/shower walls, or under cabinets with no floor clearance.

• Concrete Floors: GFCI protection is strictly required for heating cables installed in electrically heated floors of bathrooms, kitchens, and hydromassage tub locations.

SLIDE 3 (WALL-MOUNTED CABLES & PANELS)

Requirements for In-Wall Heating:

• GFCI & AFCI Protection: Heating cables and panels installed in, on, or behind walls must be both GFCI protected and AFCI protected.

• Height Limit: Wall-installed heating cables and panels are permitted no more than 1.2 m (4 ft) above the floor.

SLIDE 4 (WRAP-UP) 💡 Apprentice Pro-Tip: 

When installing radiant heating cables in bathroom floors or behind wall panels, remember that dedicated GFCI protection is mandatory to protect against shock hazards in wet areas!

💬 Save this post for your next radiant flooring project!

🔗 More code breakdowns and study tools at www.JoshTheSparky.com

← View Chapter 4 Home

← Article 424 Fixed Electric Space-Heating Equipment

← Back To Quick Hits Home