Conduit Fill: NEC Calculator

Conduit Fill is a professional NEC code calculator for licensed electricians. Sixteen calculators in your pocket, every result cited to the NEC table or section it came from, every PDF inspector-ready.

WHAT YOU GET

• 16 NEC calculators: Pipe Fill %, Conduit Sizing, Voltage Drop, Wire Size, Box Fill, EGC Sizing, GEC Sizing, Motor FLA, Transformer Sizing, Generator Sizing, Pipe Bending, Service Entrance, Load Calculation, Ampacity Derate, Pull Tension, Ohm's Law.

• NEC year-aware. Switch between 2017, 2020, 2023, and 2026 in one tap and every calculator recalibrates.

• Inspector citations on every result. Chapter 9 Table 1 for fill, 310.16 for ampacity, 250.66 for GEC, 250.122 for EGC, 220.82 for dwelling load, 314.16(B) for box fill.

• Live cross-section visualization for Pipe Fill. Watch the conduit pack as you drop wires. Threshold haptics fire the moment you cross 40 percent.

• Quick Add tray. Tap a gauge, that wire is in the conduit. Auto-Phase rotates Black, Red, Blue across hot taps. Quick combos drop entire circuit groups in one tap.

• Field Mode. Glove-friendly buttons, haptic confirms, larger taps for the job site.

• Inspector-ready PDF exports. Stamped with your name, license number, and state.

• Projects with photos. Group calculations under a job, attach panel and splice photos, export the whole bundle.

• Built for offline. Every NEC table is on-device. Works in basements, crawlspaces, mechanical rooms, and remote sites.

DEEP NEC COMPLIANCE

• Chapter 9 Note 5 nipple rule (60% on 24-inch and shorter runs)
• Note 9 multiconductor cable rule
• Note 4 bare-conductor dimensions
• Separate TW (60C) and THW (75C) jacket sizing
• 2020 NEC 314.16(B)(5) quarter-volume EGC sets
• Full Polywater straight-pull formula with vertical-riser support

PRICING

Try Yearly free for 3 days, then $39.99 per year. Or pay $69.99 once for Lifetime and never see this screen again. Monthly is $7.99.

PRIVACY

No accounts. No sign-in. No tracking. No analytics. Your projects, calculations, and license stamp live on your device only. We do not collect or transmit your data.

NOT ENGINEERING ADVICE

Conduit Fill is a reference and calculation tool. It is not a substitute for the NEC, the Authority Having Jurisdiction, or the judgment of a licensed electrician or engineer. Final responsibility for any installation rests with the licensed installer of record.

TERMS & PRIVACY

Privacy Policy: https://pandataps.com/privacy/conduit-fill Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/