# Conduit Fill: NEC Calculator — Voltage Drop & Wire Size

> Voltage Drop & Wire Size (iPhone/iPad app by 就洪 邓.)

- Source: https://appshunter.io/ios/app/conduit-fill-nec-calculator/id6808567970 (this page in markdown: same URL + `.md`)
- Developer: [就洪 邓](https://appshunter.io/developer/1569775618)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: American English
- Released: 2026-09-16
- Data updated: 2026-10-14

## What is Conduit Fill?

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, wires, fill, voltage drop, and what you pull. Free PDFs carry a SAMPLE mark.

FREE AND UNLOCK
Free: fill on EMT and THHN, one What pipe?, one V-Drop, one saved job, 2026, SAMPLE PDF.
$7.99 once: unlimited V-Drop and What pipe?, Wire, 2023 and 2026, 50 jobs, clean PDF. Restore lives in Settings.

Works in airplane mode. Tables ship in the app.

This is a field calculator. It is not NFPA 70, not the codebook, and not AHJ approval. Verify every pull against the edition your inspector is using.

◆ Privacy
Data Not Collected. No tracking.

◆ Terms of Use
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

◆ Support
https://conduitcalc.txyou.com/support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock the job | $7.99 | one-time |


## Is Conduit Fill safe?

Not enough ratings yet to assess Conduit Fill.

## Is Conduit Fill legit?

Conduit Fill: NEC Calculator appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Conduit Fill is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-16

No release notes.

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All apps by 就洪 邓: https://appshunter.io/developer/1569775618

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-14.*