Solar Wire Sizer
NEC 690.8 Wire Sizer
$0.99 · In‑App Purchases · Designed for iPad. Not verified for macOS.
Solar Wire Sizer - professional NEC calculator for electricians. Offline, permit-ready.
Solar Wire Sizer helps solar energy professionals select the correct wire size for PV systems based on NEC standards.
FEATURES:
- Wire sizing per NEC Table 310.16 ampacity ratings
- Max circuit current per NEC 690.8(A)(1): Isc x 1.25, then both printed 690.8(B) checks: base ampacity vs 156%, corrected ampacity vs 125%
- Voltage drop calculation with configurable thresholds (2-3%)
- Temperature derating per NEC Table 310.15(B)(1)
- Copper and aluminum conductor support
- DC, AC single-phase, and AC three-phase circuits
- 60C, 75C, and 90C insulation temperature ratings
- Wire sizes from 14 AWG to 500 kcmil
NEC COMPLIANCE:
- NEC 690.8(A),(B)(1),(B)(2) - PV circuit current and two-step conductor ampacity
- NEC 690.31 - Methods permitted for PV wiring
- NEC Table 310.16 - Allowable ampacities of insulated conductors
- NEC Table 310.15(B)(1) - Ambient temperature correction factors
- NEC Chapter 9 Table 8 - DC resistance values
OPTIONAL PRO UPGRADE - $2.99 ONE-TIME IN-APP PURCHASE
The following features require a separate one-time in-app purchase. They are not required to use the calculator:
- Unlimited saved calculation history
- PDF export of results
- Dark theme
- Ad-free experience
UPGRADE TO PRO:
- Remove banner ads
- Unlimited calculations
- Dark theme support
Designed for solar installers, electricians, and PV system designers working in the United States.
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Conductor sizing now follows the printed two-step NEC 690.8(B) check:
- (B)(1) base ampacity vs 156% of Isc, (B)(2) corrected ampacity vs 125% - no more over-derating on hot or bundled runs
- Voltage drop now computed at 125% max circuit current (was 156%)
- Aluminum 300 kcmil corrected to printed 310.16 values (195/260 A)
The developer, Rizvan Adzhoian, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
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The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Rizvan Adzhoian
- Size
- 33.9 MB
- Category
- Utilities
- Compatibility
Requires iOS 13.0 or later.
- iPhone
Requires iOS 13.0 or later. - iPad
Requires iPadOS 13.0 or later. - iPod touch
Requires iOS 13.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
18+
- 18+
- Contains
Advertising
- In-App Purchases
Yes
- Pro Unlock $2.99
- Copyright
- © 2026 Rizvan Adzhoian