# NESC Clearances

> Generates NESC clearance reports for transmission line design. (iPhone/iPad app by Zhenfu Dong.)

- Source: https://appshunter.io/ios/app/nesc-clearances/id1194342387 (this page in markdown: same URL + `.md`)
- Developer: [Zhenfu Dong](https://appshunter.io/developer/1186134751)
- Category: Reference, Utilities
- Price: Free with in-app purchases
- Rating: 4.80/5 from 6 App Store ratings
- Age rating: 4+
- Requires: iOS 10.0 · 14 MB
- Languages: American English
- Released: 2017-01-18
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/nesc-clearances/id1194342387/reviews.md

## What is NESC Clearances?

The Transmission Line Tool on Mobile (TLTM) "NESC Clearance Tables" is designed to generate clearance reports in accordance with Section 23 of the NESC 2017-C2. The Tool covers the majority of clearance tables required in transmission line design.
Although the basic version of this Tool may satisfy the general purpose - AC voltage system, US unit, and majority of the NESC Clearance Tables that a transmission line engineer usually refers to, please note the full version has additional features as follows:
(i) Clearances for direct current transmission line design; 
(ii) Clearance tables reported using Metric Unit.
(iii) Clearance tables calculated using the Alternate Method.

## Key features

- NESC 2017-C2 clearance reports
- AC voltage system support
- US unit system
- DC transmission line design (full version)
- Metric unit reporting (full version)
- Alternate calculation method (full version)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Unlock All Features | $4.99 | one-time |



## Frequently asked questions about NESC Clearances

### What NESC standards does NESC Clearances support?

NESC Clearances generates reports based on Section 23 of the NESC 2017-C2 standard. The basic version covers the majority of clearance tables typically used in transmission line design.

### What are the differences between the basic and full versions of NESC Clearances?

The full version of NESC Clearances offers additional features including support for direct current transmission line design, clearance tables reported in metric units, and calculations using the Alternate Method.

### Is NESC Clearances available on Android devices?

NESC Clearances is currently available for iPhone, iPad, and iPod. Support for Android devices is not mentioned in the provided data.

### How often is NESC Clearances updated?

The latest version, 1.3, was released on September 19, 2020. The app was initially released on January 18, 2017, indicating updates are not very frequent.

### What is the user rating for NESC Clearances?

NESC Clearances has a high user rating of 4.8 stars based on 6 ratings, suggesting positive user sentiment among its users.

### What is the age rating for NESC Clearances?

NESC Clearances has an age rating of 4+, making it suitable for a wide range of users.

### Does NESC Clearances have ads?

No, NESC Clearances does not contain advertisements. The app is free to download and use, with optional in-app purchases for advanced features.

## Version history (last 4 releases)

### 1.3 — 2020-09-19

1. Adjusted layout to fit iPhone XS and XS_Max screen dimension.
2. Re-arranged items in the bonus table "235-6A"
3. Corrected base elevation when adjusting clearance adder per altitude in tables using the Alternate Method

### 1.2 — 2018-10-25

Fixed bug associated with number of significant figures.

### 1.1 — 2018-10-20

Corrected base clearance to swimming pool (was 25.5 feet; corrected to 25.0 feet).

### 1.0 — 2017-01-18

No release notes.

## More apps by Zhenfu Dong

- [Notes for Photo](https://appshunter.io/ios/app/notes-for-photo/id1275972046)
- [Places in Bible](https://appshunter.io/ios/app/places-in-bible/id1289006919)

All apps by Zhenfu Dong: https://appshunter.io/developer/1186134751

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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 2026-06-10.*