ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
dsk 13
Admin 8
Recent Posts
Grid problem??
by annemarie1. 08/21/17 01:10 PM
Bathroom electrical
by doc. 08/19/17 06:53 AM
electircal ageing test on IPC
by SIAME. 08/15/17 02:43 AM
electrical aging test on IPC
by gfretwell. 08/15/17 12:27 AM
"Line level" audio on Cat 5?
by gfretwell. 08/08/17 10:39 PM
New in the Gallery:
Gallery Test
Popular Topics(Views)
240,077 Are you busy
175,698 Re: Forum
167,909 Need opinion
Who's Online Now
0 registered members (), 42 guests, and 8 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#167570 - 08/15/07 04:49 PM need help got a question?  
JourneymanAndy  Offline
New Member
Joined: Aug 2007
Posts: 1
MA
if you got a 24 volt dc transformer and you switch the polarity would you still have 24 volts or would it be 0?


Tools for Electricians:

#167571 - 08/15/07 05:36 PM Re: need help got a question? [Re: JourneymanAndy]  
Radar  Offline
Member
Joined: Apr 2004
Posts: 349
Los Angeles, CA
Quote
24 volt dc transformer

One problem here is that transformers won't work on ordinary DC, meaning a DC voltage applied to the primary winding. (We're discounting a pulsating DC for sake of simplicity).

Your question needs to be clarified a bit. If you mean a transformer/rectifier unit that has an AC voltage applied at the primary (input) and outputs 24V DC, then in theory reversing the AC input leads should make no difference in the output voltage.

One qualifier here - in practicle applications, the AC side (Primary) may be made with one lead intended to be the "hot" on a 120V system and the other lead intended to be the "neutral". This has no affect the actual circuit operation - but will affect safety, etc.


There are 10 types of people. Those who know binary, and those who don't.


Member Spotlight
noderaser
noderaser
Portland, Oregon, United States
Posts: 404
Joined: March 2007
Show All Member Profiles 
Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 15 (0.002s) Memory: 0.7440 MB (Peak: 0.8618 MB) Zlib enabled. Server Time: 2017-08-22 11:06:38 UTC