ELcalcZs is an Electrical Calculator App, that will calculate R1 + R2 and Earth fault loop impedance (Zs), for a new electrical installation. Complies to BS 7671 : 2008 17th EDITION Suitable for copper cables up to 25mm. **********************Pro Version available for cables up to 1000mm.Also allows selection for ambient temp andcorrection factors for cable type.********************** Please rate this app if you like it. If you would like any features added,or would like a specific app createdfor Android Market, then please emailus at coops5575@gmail.com. ******************************ELcalc+ Cable Size CalculationApp Now Available....****************************** PC Software available atwww.coopersoft.co.uk