JobVolt: NEC Electrician Calc

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.