# Electrical Calculator: Panel — NEC Load, Circuit & Breaker

> NEC Load, Circuit & Breaker (iPhone/iPad app by Shanghai Sheyuan Network Technology Co., Ltd..)

- Source: https://appshunter.io/ios/app/electrical-calculator-panel/id6761541388 (this page in markdown: same URL + `.md`)
- Developer: [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858)
- Category: Utilities, Productivity
- Price: $4.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-04-04
- Data updated: 2026-09-24
- User reviews in markdown: https://appshunter.io/ios/app/electrical-calculator-panel/id6761541388/reviews.md

## What is Electrical Calculator?

Filling out a panel schedule and need to check if total connected load passes the NEC 80% continuous load rule? Add your circuits, see kW totals, and get an instant panel utilization percentage — before the inspector shows up.

Add circuits with name, voltage, phase, and amperage. The app calculates each circuit's watt load, tracks total connected load, and checks the 80% continuous load rule against your panel rating.

WHAT IT CALCULATES:
- Total connected load in W and kW
- Per-circuit watt load from volts, amps, and phase
- Panel utilization percentage with color-coded status
- Total amperage at your panel voltage
- Overload warning when utilization passes 80%

VOLTAGE CONFIGURATIONS:
- 120V, 208V, 240V, 277V, 480V
- Single phase and three phase

KEY FEATURES:
- Editable panel schedule with swipe-to-delete and Clear All
- NEC 80% continuous load rule check against your main breaker
- Enter any main breaker amperage and panel voltage
- Watt totals per circuit, W/kW total for the panel
- Works completely offline

Built for licensed electricians, electrical engineers, and building inspectors.


## Version history (last 4 releases)

### 1.0.3 — 2026-09-22

Updated app name and metadata.

### 1.0.2 — 2026-06-27

Added a More Pro Tools section to discover related field calculators.

### 1.0.1 — 2026-04-13

Bug fixes and performance improvements.

### 1.0 — 2026-04-04

No release notes.

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All apps by Shanghai Sheyuan Network Technology Co., Ltd.: https://appshunter.io/developer/1560626858

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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 2026-09-24.*