Quick Hits

SLIDE 1 (HOOK / COVER) ⚡ NEC Quick Hit: Article 362 - Electrical Nonmetallic Tubing (ENT) ⚡ 

Working with ENT ("blue dragon skin")? Stop guessing your raceway fill limits. Here is your quick-reference breakdown for 1/2" through 2" ENT! 👇

SLIDE 2 (SMALLER TRADE SIZES) ENT Internal Dimensions & Fill Areas (1/2" & 3/4"):

• 1/2" Trade Size (Metric 16):

  • Total Area (100%): 0.285 in² (184 mm²)

  • Over 2 Wires (40% Fill): 0.114 in² (73 mm²)

  • Internal Diameter: 0.602 in. (15.3 mm)

• 3/4" Trade Size (Metric 21):

  • Total Area (100%): 0.508 in² (328 mm²)

  • Over 2 Wires (40% Fill): 0.203 in² (131 mm²)

  • Internal Diameter: 0.804 in. (20.4 mm)

SLIDE 3 (MEDIUM TO LARGE SIZES) ENT Fill & Area Reference (1" to 2"):

• 1" (Metric 27): Total Area 0.832 in² | 40% Fill: 0.333 in²

• 1-1/4" (Metric 35): Total Area 1.453 in² | 40% Fill: 0.581 in²

• 1-1/2" (Metric 41): Total Area 1.986 in² | 40% Fill: 0.794 in²

• 2" (Metric 53): Total Area 3.291 in² | 40% Fill: 1.316 in²

⚠️ Note: ENT sizes 2-1/2" and up are not commonly manufactured or listed under standard Article 362 tables for general runs—stick to 1/2" through 2" for your standard commercial/residential pulls!

SLIDE 4 (WRAP-UP) 💡 Apprentice Tip: Always check your conductor cross-sectional areas against these 40% fill limits (or 53% for 1 wire / 31% for 2 wires) to keep your pipe runs legal and pull-friendly.

💬 Save this post for your next blueprint layout or rough-in! 🔗 More code breakdowns and apprentice tools at www.JoshTheSparky.com

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