ElectroCalc Pro

ElectroCalc Pro is an all-in-one, professional mobile engineering suite designed for electrical engineers, contractors, master electricians, designers, and technicians. Easily solve complex electrical distribution calculations, power system sizing, and code compliance checks right from your phone.

Built around international engineering standards including IEC 60364, NEC (NFPA 70), GB 50054, IEEE 80, and GB 50034, ElectroCalc Pro ensures your power system designs are safe, efficient, and fully verified.

⚡ Key Calculation Modules

Cable & Wire Sizing

Calculates recommended conductor cross-sectional area (

/ AWG) based on load current, installation method, thermal correction factors, and derating.

Voltage Drop Analysis

Precise single-phase and 3-phase voltage drop percentage (

) and terminal voltage calculation over line distance.

Conduit Fill & Capacity

Calculates total conductor outer area fill ratio (

) to recommend optimal conduit trade sizes based on NEC Chapter 9 / GB 50054 limits.

Motor Starter Sizing

Solves Motor FLC (Full Load Current), locked-rotor starting peak, contactor AC-3 rating, and thermal overload protection range for DOL, Star-Delta, and Soft Starter setups.

Transformer Capacity Sizing

Selects optimal standard transformer kVA ratings based on active load, power factor, future growth allowance, and operating efficiency zones.

Earthing & Grounding Resistance

Estimates grounding rod array resistance based on soil resistivity (

), rod quantity, length, and group reduction coefficient per IEEE Std 80 / GB 50065.

Lighting & Illuminance (LUX)

Calculates required indoor fixture quantities, actual maintained illuminance (Lux), and Lighting Power Density (

) using the Lumen method.

Power Factor Correction

Determines required shunt capacitor bank ratings (

) to raise power factor and reduce reactive line losses.

Short Circuit Current Analysis

Estimates prospective short circuit fault current (

) at the secondary panelboard for proper protective device rating selection.

Load Demand & Diversity Factor

Applies standard demand and diversity factors across residential, commercial, and industrial load types.

🛠️ Professional Features

📄 PDF Engineering Datasheet Export: Generate clean, professional PDF technical report datasheets to print or share directly with clients and field inspectors.

📜 Formula & Code Explanations: Includes interactive formula dialogs explaining underlying equations and engineering principles.

🌐 Multi-Standard & Multi-Language: Seamlessly switch between IEC, NEC, and GB standards, with full support for English and Simplified Chinese.

⏱️ Local History Tracking: Automatically log past calculations with instant search and one-tap copy/share functionality.