JobVolt: NEC Electrician Calc
NEC 2026 Wire Size & Load Calc
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Launch pricing on Lifetime for the first 90 days. Every table verified against NEC 2023 and 2026. No ads, no account, works offline.
The wire size you submit is only right if the math behind it is right. JobVolt
is the electrical calculator built for electricians who answer to an
inspector: an NEC calculator where every table is
independently verified against NEC 2023 and 2026, every result shows its full
derivation, and every report you send looks like it came from an engineer.
CALCULATIONS THAT SHOW THEIR WORK
- Wire Size per Table 310.16 with ambient correction, conductor adjustment,
terminal limits 110.14(C), NM cable caps, parallel runs and the 83%
dwelling rule
- Voltage Drop per Chapter 9 Table 8, single and three phase
- Conduit Fill per Chapter 9 Tables 1, 4 and 5, with jam ratio warnings
- Box Fill per 314.16 with device, clamp and ground allowances
- Dwelling load calculation per 220.82 with EV charger and heat pump
loads, NEC 2026 ready including the new 2 VA rule and Article 120
renumbering
- Motor FLC, conductor, OCPD and overload per Article 430
- Grounding: EGC per 250.122 and GEC per 250.66, with upsizing
- Ohm's Law and power triangle
Tap Why on any result and see every step with its code section. Tap the code
chip and the NEC table opens with your row highlighted.
REPORTS AN INSPECTOR TAKES SERIOUSLY
Combine calculations into a multi-page PDF submittal: your company name,
license and logo on the letterhead, a summary index, full code citations and
a certification block with signature lines. Six templates, from city
submittal to client-ready service report. Checked against real county
worksheet formats.
BUILT FOR THE JOB SITE
Works fully offline. No account. No ads. Every calculation saves to History
automatically. Free NEC edition updates, including 2026.
FREE VS PRO
Free: five calculators, one report with six blocks, the Submittal template.
Free reports carry a small JobVolt line in the footer.
Pro unlocks Load Calc, Motor and Grounding, unlimited reports and blocks,
all six templates and your logo on the letterhead. Monthly, annual with a
free trial, or one-time Lifetime.
Found a number you disagree with? Tap "Report a discrepancy" inside any
calculator. A person answers, checks the code and fixes it if we are wrong.
SUBSCRIPTION DETAILS
JobVolt Pro Monthly: $6.99 per month, auto-renews monthly until canceled.
JobVolt Pro Annual: 7-day free trial, then $39.99 per year, auto-renews yearly until canceled.
JobVolt Pro Lifetime: $59.99 one time, no renewal.
Payment is charged to your App Store account at confirmation of purchase. Cancel anytime in your App Store account settings, at least 24 hours before the current period ends. Any unused part of a free trial is forfeited when you buy a subscription.
Terms of Use: https://jobvolt.app/terms/
Privacy Policy: https://jobvolt.app/privacy/
NEC and National Electrical Code are registered trademarks of the National
Fire Protection Association. JobVolt is not affiliated with the NFPA.
Ratings & Reviews
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The developer, Capionic LTD, 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 Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- CAPIONIC LTD
- Size
- 67.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later. - iPad
Requires iPadOS 16.4 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- JobVolt Pro Lifetime $59.99
- JobVolt Pro Monthly $6.99
- JobVolt Pro Annual $39.99
- Copyright
- © 2026 Capionic LTD