Doesn’t work.
App asks to select wire insulation. Regardless of which insulation you select, it will ask you to select a different insulation. Shows 1/2” conduit and 18awg wire for a 3000kva transformer with a 480v secondary. Save your money.
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About
This app provides electricians with instant transformer sizing and advanced construction math, compliant with both US (NEC 2023) and Canadian (CEC 2024) electrical codes. It simplifies complex calculations for wire, conduit, and overcurrent protection, and includes a fractional construction calculator.
✓Dual code compliance (NEC 2023, CEC 2024)
✓Instant transformer sizing
✓Wire and conduit sizing
✓Overcurrent protection calculation
✓Fractional construction calculator
✓Unit conversion
✓Dark mode support
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What's New in Transformer Calc 2
1.2.1
January 27, 2026
- Fixed issue with pipe size not updating properly.
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FAQ
What electrical codes does Transformer Calc 2 support?
Transformer Calc 2 supports both the 2024 Canadian Electrical Code (CEC) and the 2023 National Electrical Code (NEC) for the USA. You can seamlessly switch between these standards within the app's settings.
How does Transformer Calc 2 help with transformer sizing?
You can input your transformer's KVA, primary and secondary voltages, and configuration (Delta or Wye). The app then instantly calculates Full Load Amps (FLA), appropriate Overcurrent Protection (fuse or breaker), and Bonding requirements.
Can Transformer Calc 2 size wires and conduits?
Yes, the app automatically sizes primary and secondary wires, determining minimum size and ampacity based on the selected code. It also calculates minimum conduit pipe size and fill percentages.
What kind of construction math can Transformer Calc 2 perform?
Transformer Calc 2 includes a built-in construction calculator that handles fractional math with ease, including feet, inches, and fractions like 1/16 and 1/8. It also performs unit conversions and complex dimensional calculations for volume and area.
Is Transformer Calc 2 customizable for my workflow?
Yes, you can customize settings such as default wire types (THHN, THW, XHHW, etc.), temperature ratings (60, 75, or 90 degrees C), and precision preferences to match your daily work.
Does Transformer Calc 2 have ads?
No, Transformer Calc 2 does not contain advertisements. It is a paid application designed for professional use without interruptions.
What devices is Transformer Calc 2 available on?
Transformer Calc 2 is available for iPhone and iPad devices. It supports dark mode for comfortable viewing in various lighting conditions.
How often is Transformer Calc 2 updated?
The app was last updated on January 27, 2026, indicating ongoing support and potential for future code updates. The latest version is 1.2.1.
