electrical question - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > DIY Projects > Brew Stands > electrical question

Reply
 
Thread Tools
Old 03-24-2008, 06:31 PM   #1
missing link
Recipes 
 
Jul 2007
Highland, MI
Posts: 648
Liked 3 Times on 3 Posts



will a switch rated for 25 amps DC work with 15 amps @120v? I am assuming it should.

Linc
__________________
Tap#1 = Beer
Tap#2 = Beer

THey change to often to keep up with the Sig.

 
Reply With Quote
Old 03-24-2008, 07:23 PM   #2
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Oak Grove, Oregon, USA
Posts: 25,595
Liked 152 Times on 143 Posts


What is the voltage rating? A 25 amp 12 volt DC switch would probably fry.
__________________
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"

"I would like to die on Mars, just not on impact." Elon Musk

 
Reply With Quote
Old 03-24-2008, 07:58 PM   #3
wihophead
Recipes 
 
Jul 2007
Racine, Wisconsin
Posts: 700
Liked 3 Times on 2 Posts


Actually it is the other way around....AC current ratings are higher then DC current rating for a given voltage. The reason being that it takes a much more robust contact to break DC under load this is why large DC contactors have arc chutes or bellows to help extinguish arcs.

Here is the contact rating off of a relay on my work bench for example

15A , 120VAC
15A, 30VDC

The question is if it is rated for 120VAC, if it isn't marked as such then it isn't.

 
Reply With Quote
Old 03-25-2008, 07:49 PM   #4
Shockerengr
HBT_SUPPORTER.png
Recipes 
 
Feb 2007
Posts: 468
Liked 27 Times on 23 Posts


the other bit that goes in is the dielectrics used in the switch....keep in mind that a 120 VAC has a peak voltage of around 170v

 
Reply With Quote
Old 03-26-2008, 02:11 AM   #5
slnies
 
slnies's Avatar
Recipes 
 
Aug 2007
Maple Lake MN
Posts: 851
Liked 10 Times on 10 Posts


Quote:
Originally Posted by Shockerengr
the other bit that goes in is the dielectrics used in the switch....keep in mind that a 120 VAC has a peak voltage of around 170v
the 120 volt rating is a nominal rating and takes into account the peak.
__________________
Nies

Primary: American Wheat
Secondary: Phils Pils Clone

 
Reply With Quote
Old 03-26-2008, 11:42 AM   #6
wihophead
Recipes 
 
Jul 2007
Racine, Wisconsin
Posts: 700
Liked 3 Times on 2 Posts


Quote:
Originally Posted by slnies
the 120 volt rating is a nominal rating and takes into account the peak.
Yeah ratings are RMS voltage....

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
240 Electrical Question juvinious Brew Stands 17 04-11-2009 06:35 PM
European electrical outlet question Bigsnake General Chit Chat 11 12-23-2008 10:02 PM
Electrical Wiring Question Stevorino Brew Stands 9 11-06-2008 11:32 AM
Electrical Question, Electricians if possible!!! WortMonger Brew Stands 99 03-13-2008 04:36 PM
Building RIMS - electrical question akula169 Equipment/Sanitation 18 11-16-2005 01:37 PM


Forum Jump