Quick Hits

⚡ NEC 2026 Quick Hit: LFNC-A Fill & Area Limits ⚡

Pulling smooth-seamless liquidtight? LFNC-A (Article 356) has its own dimensions you need to account for on outdoor and wet-location pulls.

Here is your Chapter 9 Table breakdown from 3/8" to 2" 👇

Slide 2: Common Small Sizes (3/8" - 3/4")

Small LFNC-A Trade Sizes:

• 3/8" (Metric 12)

  • 100% Total Area: 0.192 in²

  • Over 2 Wires (40%): 0.077 in²

  • ID: 0.495 in.

• 1/2" (Metric 16)

  • 100% Total Area: 0.312 in²

  • Over 2 Wires (40%): 0.125 in²

  • ID: 0.630 in.

• 3/4" (Metric 21)

  • 100% Total Area: 0.535 in²

  • Over 2 Wires (40%): 0.214 in²

  • ID: 0.825 in.

Slide 3: Mid & Large Sizes (1" - 2")

Medium to Large LFNC-A Sizes (40% Fill Limit):

• 1" (Metric 27): 0.342 in² (100% = 0.854 in² | ID: 1.043 in.)

• 1-1/4" (Metric 35): 0.601 in² (100% = 1.502 in² | ID: 1.383 in.)

• 1-1/2" (Metric 41): 0.807 in² (100% = 2.018 in² | ID: 1.603 in.)

• 2" (Metric 53): 1.337 in² (100% = 3.343 in² | ID: 2.063 in.)

Slide 4: Field Takeaway & Wrap-Up

💡 Apprentice Pro-Tip:

That asterisk (*) matters! LFNC-A is the layer-type construction with a smooth inner core. Don't mix up your dimensions with LFNC-B (corrugated) or LFNC-C when sizing your conductors on paper!

💬 Save this for your next AC disconnect or pump job! 🔗 More code breakdowns & study tools at www.JoshTheSparky.com

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