# Cable Tray Fill Calc

> NEC 392 · Ladder · Solid · 50%

Canonical page: [https://chrome-stats.com/d/id6761246731](https://chrome-stats.com/d/id6761246731)

## Overview

- **ID:** `id6761246731`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Shanghai Sheyuan Network Technology Co., Ltd.
- **Category:** Utilities
- **Version:** 1.0.2
- **Last updated:** 2026-06-30
- **First published:** 2026-03-29
- **Size:** 1.17 MB
- **Data as of:** 2026-09-29
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/cable-tray-fill-calc/id6761246731)
- **Privacy policy:** [https://calcspec.com/app-privacy.html](https://calcspec.com/app-privacy.html)

## Description

30 cables in a 12-inch ladder tray - over the 50% NEC 392 fill? 4 tray types, AWG #14 to 4/0, or metric mm². $4.99 one-time, no login.

Built for electricians, cable-tray installers, and EEs who need a quick NEC 392 fill check on the deck - not a dashboard you log into.

WHAT IT DOES
Computes total cable cross-section as a percentage of tray area and compares against the NEC 392 maximum fill: 50% for ladder and wire-basket trays, 40% for solid-bottom and channel trays. Flags over-fill and shows how many more cables of the same type fit before the limit.

INPUTS
- Unit system: SAE (inches) or Metric (mm)
- Tray type: Ladder, Solid Bottom, Wire Basket, Channel
- Tray size: 9 imperial sizes / 9 metric sizes
- Cable type: AWG #14 to 4/0 (SAE) or 1.5 to 50 mm² (Metric)
- Cable count

RETURNS
- Tray area (sq in or sq mm)
- Total cable area (sq in or sq mm)
- Fill percentage
- Maximum allowed fill per NEC 392 (50% or 40% depending on tray type)
- Remaining capacity in number of cables
- Over-fill warning (red banner) when above the allowed percentage

WHY THIS APP, NOT THE FREE ONES
- Math is shown - tray area, total cable area, and the percentage all visible.
- NEC 392 fill limits applied automatically - pick the tray type and the cap follows.
- Works offline - basements, riser shafts, mid-deck rough-ins. Always available.
- No login. No ads. No telemetry. No subscription.

PRICING
$4.99. Pay once, own it. Lifetime access on iPhone, iPad, and Mac via Family Sharing.

NOT A SUBSTITUTE FOR
AHJ-stamped electrical drawings. Manufacturer cable-tray load tables. NEC 392 ampacity derating for closely-spaced multiconductor cables - this app handles cross-section fill only, not the temperature derate. Always cross-reference the engineer-stamped layout.

## Rankings

- #1,025,829 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6761246731)