EdgeSpace Box Fill
NEC Device Box Volume
$4.99 · Designed for iPad. Not verified for macOS.
NEC 314.16 box fill: conductors, yokes, clamps, grounds. PASS/FAIL volume check. Offline — $4.99, no subscription.
EdgeSpace Box Fill is an offline NEC 314.16 device-box volume checker for electricians and inspectors.
Pick a listed metal box (or a marked custom volume), the largest conductor AWG, and counts for conductors, device yokes, internal clamps, support fittings, and equipment grounding conductors. See required volume, box volume, fill used, PASS/FAIL, and a line-by-line 314.16(B) breakdown.
This is box fill — not conduit fill and not voltage drop.
WHAT YOU GET
• NEC 2023 Table 314.16(A) metal-box volumes
• Table 314.16(B)(1) allowances for 18–6 AWG
• Conductors, clamps, support fittings, devices, equipment grounding
• 2023 314.16(B)(5) extra-EGC quarter allowances
• in³ and cm³ (NEC note: 1 in³ = 16.4 cm³)
• Box diagram, share, copy, and PDF
• History and favorites
• Fully offline — no account, no ads, no subscription
One-time purchase. Always verify the adopted code edition and marked box volume.
Copyright © 2026 EdgeSpace.
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The developer, Burak Kocatepe, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Burak Kocatepe
- Size
- 6 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 17 more
- English, Czech, Danish, Dutch, Finnish, French, German, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Simplified Chinese, Spanish, Swedish, Traditional Chinese, Turkish
- Age Rating
4+
- 4+
- Copyright
- © 2026 EdgeSpace
