Copyright © 2001-2016 by Electric Power Calc Holdings Inc.  All rights reserved. The information on this website is subject to change without notice. Electric Power Calc Holdings Inc. and Electric Power Calc Inc. assume no liability for any omissions or errors that may appear on this website. PowerCalc™ is proprietary software of Electric Power Calc Holdings Inc. Copyright © 2001-2016 by Electric Power Calc Holdings Inc. All rights reserved. Covered by U.S. Patent No. 7,636,650. PowerCalc™ is a trademark of Electric Power Calc Holdings Inc. NFPA and NEC are trademarks of the National Fire Protection Association. IEEE is the trademark of the Institute of Electrical and Electronics Engineers. NEMA is the trademark of the National Electrical Equipment Manufacturers. AutoCAD and Revit are trademarks of Autodesk Inc.  Other trademarks are the property of their respective holders/owners.