ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Chinese motors rated 220 v 50 hertz
by gfretwell - 07/23/24 10:29 AM
100 Definitions: Accessible 2023
by gfretwell - 07/23/24 10:12 AM
100 Definitions, Likely to Become Energized, 2023
by gfretwell - 07/23/24 10:08 AM
240V only in a home and NEC?
by emolatur - 07/18/24 01:05 PM
2023 CEU Course
by gfretwell - 07/17/24 01:08 AM
Recent Gallery Topics:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
2 members (Scott35, HotLine1), 727 guests, and 43 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#45990 12/09/04 09:31 PM
Joined: Oct 2004
Posts: 18
R
Member
How do engineers calculate power factor on a ckt before anything is hooked up? Are motors all similar 80 percent-ish and they just estimate, or can they calculate it exactly.
The power company wants load calcs including power factor. Thanks, Ben

Horizontal Ad
Joined: Feb 2003
Posts: 231
R
Member
On motors look on the talley plate.

Joined: Oct 2004
Posts: 18
R
Member
so if the nameplate says 1hp, and it says 7 amps at 120V, then 746/840= 89 percent power factor?


Link Copied to Clipboard
Featured:


* * * * * * *
Tools for Electricians
Tools for Electricians

 
* * * * * * *

2023 National Electrical Code (NEC)
2023 NEC + Exam Prep Study Guides Now Available!

Member Spotlight
mersadrad
mersadrad
Montreal, Quebec, Canada
Posts: 28
Joined: March 2011
Top Posters(30 Days)
Popular Topics(Views)
323,531 Are you busy
247,853 Re: Forum
231,635 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5