electrical engineering

Electrical Transformer Primary Protection Fuse Sizing Calculator — NEC 450.3 Options

Get fast, code-compliant results for transformer primary fuse sizing with our NEC 450.3 options calculator, so you can protect equipment and avoid costly mistakes. Practical, easy-to-follow guidance helps you pick the right primary protection every time.

Instant Power Factor Calculator: Compute PF from kW & kVA for 1-Phase & 3-Phase

Use our instant power factor calculator to quickly convert kW and kVA into accurate PF values for both single‑phase and three‑phase systems. Get fast, reliable results and clear guidance to improve your electrical efficiency.