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Conduit Fill: NEC Calculator

Voltage Drop & Wire Size
就洪 邓 · Utilities
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App info

Developer
就洪 邓
Category
Utilities
Released
Sep 16, 2026
Version
1.0 (Sep 16, 2026)
Price
Free
Size
6.6 MB
Requires
iOS 17.0
Age rating
4+
Languages
English

In-app purchases

Unlock the job$7.99
Current prices, App Store US.
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About Conduit Fill: NEC Calculator

Will it fit. What it loses. What you pull. Offline field calculator for US residential and light-commercial electricians. One job carries the same wires across Fill, V-Drop, and Wire. Switch 2023 and 2026 in the header. One $7.99 purchase. No subscription, no account, no ads. WILL IT FIT Kitchen default is 14.8% FITS on ½" EMT with 3×#12 THHN plus a bare #12 ground. Status words stay shop talk: FITS, TIGHT, OVER. Ground uses bare area and does not upsize with the hots. WHAT IT LOSES Tap 20A rec. The 85 ft run goes HIGH at 4.5%. Upsize hots to #10 (2.8%). Ground stays #12. Feet are one-way, not the loop. WHAT YOU PULL The answer is the AWG. Put #10 on the pull because voltage drop at 85 ft, not because ampacity ran out. WHAT PIPE For EMT use ½". Types stay in shop order — EMT, then PVC, IMC, RMC — not ranked by fill percent. HAND THIS TO THE INSPECTOR One-page PDF with the job, pipe,…
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