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Author Topic: Calculating 3-phase current Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 10-04-2001 09:53 AM                     Does anyone remember the formula for calculating the current-per-leg in a 3-phase line? (Seem to remember a root 2 in there somewhere, but forget the rest of it). For example, if I am running a 4 KW load from a 208-volt, 3-phase line, what current should I expect to see on each leg?  |  IP: Logged John Pytlak Film God Posts: 9987 From: Rochester, NY 14650-1922 Registered: Jan 2000 posted 10-04-2001 11:58 AM                        Here's a link to the information: http://www.chromaloxheating.com/technical/pdf/electrical.pdf ------------------ John P. Pytlak, Senior Technical Specialist Worldwide Technical Services, Entertainment Imaging Research Labs, Building 69, Room 7525A Rochester, New York, 14650-1922 USA Tel: 716-477-5325 Cell: 716-781-4036 Fax: 716-722-7243 E-Mail: john.pytlak@kodak.com Web site: http://www.kodak.com/go/motion  |  IP: Logged Evans A Criswell Phenomenal Film Handler Posts: 1579 From: Huntsville, AL, USA Registered: Mar 2000 posted 10-04-2001 01:37 PM                        quote: Does anyone remember the formula for calculating the current-per-leg in a 3-phase line? (Seem to remember a root 2 in there somewhere, but forget the rest of it). Actually, it's a square root of 3. In the document John linked to, everywhere you see a "1.73", that's the square root of 3, and if you want more accuracy than 3 significant digits (barely), use your calculator's square root feature. ------------------ Evans A Criswell Huntsville-Decatur Movie Theatre Information Site  |  IP: Logged Rick Long Jedi Master Film Handler Posts: 759 From: Toronto, Ontario, Canada Registered: Nov 1999 posted 10-04-2001 05:41 PM                     Exactly what I was looking for. Thank you John and Evans.  |  IP: Logged

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