Calculators & Engineering Engines

Searchable database of 40+ classified condition report defect scenarios with 1-click clipboard copy of compliant wording for test certificates.

Instant on-site lookups for BS EN 60529 IP ratings (0-6 / 0-9K), Section 701 Bathroom Zones, Earthing systems (TN-S, PME, TT), and Table 41.1 disconnection times.

A4 print-ready inspection sheets: HSE GS38 10-Step Safe Isolation procedure, Minor Works test schedule, Emergency Lighting 3-hour discharge log, and Motor QC sheet.

Directory of UK statutory enactments (EAWR, PUWER, DSEAR), designated standards (BS EN 60204-1, BS EN 61439), and searchable electrical trade dictionary.

Calculate circuit voltage drop from first principles using tabulated mV/A/m values, line length, design current, and power factor cos φ.

Determine minimum required cable current carrying capacity (Iz) applying ambient temperature, grouping, insulation, and protective device derating.

Verify protective conductor (CPC) cross-sectional area against prospective fault current let-through energy under short-circuit and earth fault conditions.

Look up maximum earth fault loop impedance for MCBs, RCBOs, and fuses across 0.4s and 5s disconnection times with automatic 80% rule temperature correction.

Calculate 3-phase and single-phase full load current, plus locked-rotor starting current spikes for Direct-On-Line, Star-Delta, Soft Starter, and VFD.

Size diesel and gas gensets accounting for high-inertia motor starting kVA steps, non-linear harmonic loads, transient voltage dips, and altitude/temperature derating.

Model real-world energy reduction achieved by replacing mechanical damper/throttle valves with Variable Frequency Drives on centrifugal fans and pumps.

Compute the operating cost of any electrical equipment per hour, 8-hour shift, month, and year with customizable electricity unit rates and duty cycles.

Instant conversion between Active Power (kW), Apparent Power (kVA), Reactive Power (kVAR), Mechanical Horsepower (HP), and 3-Phase Line Current.