Calculates main earth, bonding and cpc sizes, includes the Adiabatic Equation.
Convert and calculate kVA, Amps, Volts, kW and Power Factor Single & Three phase
Calculate to or from Watts, Amps, Volts with this handy power converter SP & TP
Ohm's Law calc for Volts, Amps, Ohms & Watts (Power Current Resistance Voltage)
Pre-amendment 3 version, useful for looking up old Zs values before amendment 3.
Calculate the maximum Zs values for MCB's and fuses to BS 7671 Amendment 3 2015.