ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 19
Recent Posts
fuse rejectors
by NORCAL. 03/29/17 01:44 AM
Old decora style outlets
by NORCAL. 03/29/17 01:41 AM
NFPA stuff
by gfretwell. 03/28/17 08:08 PM
Anyone hiring inspectors?
by HotLine1. 03/27/17 08:03 AM
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,728 Are you busy
166,627 Re: Forum
160,784 Need opinion
Who's Online Now
0 registered members (), 57 guests, and 11 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#68418 - 08/08/06 10:26 AM Breaker: 250V or 125V?  
Christopher.Banbury  Offline
Junior Member
Joined: Aug 2006
Posts: 2
Brooksville, FL, USA
I purchased a refurbished battery backup that uses 125V/30A single phase power from a L5-30R receptacle. The on-board breaker is replaceable on the rear and is listed at 250V/30A. The reported trip amperage is 37.5A. Will this breaker throw at 4687W (125V) or not until 9375W (250V)?


Christopher Banbury, PE
President
Ark Engineering, Inc.
PO Box 10129, Brooksville, FL 34603
22 N. Broad ST, Brooksville, FL 34601
Phone: (352) 754-2424
FAX: (352) 754-2412
www.arkengineering.net

Work Gear for Electricians and the Trades

#68419 - 08/08/06 01:08 PM Re: Breaker: 250V or 125V?  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
IL
The breaker doesn't care about the load watts. In its themal mode (overload) it only cares about the watts caused by the current flowing through its thermal element. These watts are based on the impedance of the thermal element and the current (amps).
Don


Don(resqcapt19)


Member Spotlight
richard
richard
L.I. New York
Posts: 94
Joined: August 2003
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.011s Queries: 14 (0.002s) Memory: 0.7415 MB (Peak: 0.8574 MB) Zlib enabled. Server Time: 2017-03-29 11:04:23 UTC