Kegconnection Complete Starter Kit and More Giveaway!


Home Brew Forums > Home Brewing Beer > Electric Brewing > Element amperage question

Reply
 
LinkBack Thread Tools
Old 05-04-2012, 08:24 PM   #1
CJBrewVT
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Rutland, VT
Posts: 67
Liked 1 Times on 1 Posts

Default Element amperage question

My understanding is that AC fluctuates and can vary slightly. If a 2000 watt heater for 120 volts pulls 16.6 amps, does it pull more amps to maintain watts if the voltage drops to say 110 volts?

Do some of you run 2000w on a 20 amp circuit? It's close to the 80% threshold.

__________________
CJBrewVT is offline
 
Reply With Quote Quick reply to this message
Old 05-04-2012, 08:42 PM   #2
passedpawn
Moderator
HBT_MODERATOR.png
Feedback Score: 0 reviews
 
passedpawn's Avatar
Recipes 
 
Join Date: Apr 2009
Location: ☼ Clearwater, FL ☼
Posts: 18,262
Liked 3058 Times on 1925 Posts
Likes Given: 2593

Default

No. Elements are fixed resistance, so if you drop the voltage the current will drop as well.

Use I = V/R to find the current at any voltage (I = Amps, V = the RMS voltage, or say 110).

For your element, the fixed resistance of the element, R, is 7.2 ohms. (R = V^2/W = 120^2 / 2000 = 7.2)

So, @ 110V, the current is I = V/R = 110/7.2 = 15.3A

__________________
I'd love to change the world
But I dont know what to do
So Ill leave it up to you
passedpawn is offline
 
Reply With Quote Quick reply to this message
Old 05-09-2012, 12:57 AM   #3
CJBrewVT
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2011
Location: Rutland, VT
Posts: 67
Liked 1 Times on 1 Posts

Default

Thank you! Ordered a 2000w element. Can't wait to get it all together.

__________________
CJBrewVT is offline
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
tri-clover removable element - brewershardware element adapter canyonbrewer Electric Brewing 44 04-22-2013 02:24 AM
Element Question Airplanedoc Electric Brewing 9 02-05-2012 07:06 PM
Question on element agezzi Electric Brewing 8 11-05-2011 02:17 PM
Amperage question milesvdustin Electric Brewing 4 03-31-2011 07:19 AM
Ekeggle amperage question BenS Electric Brewing 17 03-04-2011 03:48 AM