Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-09-2008, 12:13 PM   #1
Newbie
 
Join Date: Jul 2008
Posts: 1
Rewards Points: 10
Default

How Does A Double Pole Circuit Breaker Trip?


On my electrical service panel, the "MAIN" breaker is a double pole breaker and each side is marked "100 Amps." Does that mean that when the total amperage exceed 100 one side it will trip, or if the total of both sides exceed 100 amps it will trip? So do can all my appliances together draw up to 200 amps, or just 100 amps? Also, I recently bought a new electric range. I need a double pole breaker because it uses 240 volts, and the total consumption of the range should not exceed 40 amps. Should I get a double pole breaker with 20 amps marked on each side (the whole thing is marked 20 amp double pole breaker) or should I get one with 40 amps marked on each side (the whole thing is marked 40 amp double pole breaker)?

shadowx360 is offline   Reply With Quote
Old 07-09-2008, 01:54 PM   #2
Member
 
Join Date: Jul 2007
Posts: 308
Rewards Points: 250
Default

How Does A Double Pole Circuit Breaker Trip?


If current exceeds 100A through either leg of the 220V line, both sides will trip together.
So, you can draw up to 100A on each side, and that current can be a combination of 110V appliances on one leg, or 220V appliance on both legs.
Both poles of a double pole breaker will always trip together if current through either leg exceeds the rating.

For your range, if the specs are 40A at 220V, you need a 40 Amp double-pole breaker.

Hope this helps

FW

fw2007 is offline   Reply With Quote
Old 07-09-2008, 02:44 PM   #3
Licensed Electrician
 
jrclen's Avatar
 
Join Date: Feb 2008
Location: central wisconsin
Posts: 982
Rewards Points: 500
Default

How Does A Double Pole Circuit Breaker Trip?


A double pole breaker is the same as two single pole breakers connected together. So your 100amp 2 pole is 2 100 amp breakers side by side. If either side conducts more than 100 amps the entire unit will trip or open. Both sides will shut off together

That breaker can supply 100 amps of current at 240 volts. It can supply 200 amps of current at 120 volts. Or any combination of the two as long as neither one exceeds 100 amps.

If your range requires a 40 amp 240 volt circuit, then each side of the 2 pole breaker will be 40 amps.

A home type electrical service consists of 2 legs of power at opposite polarity. Between the 2 legs there is 240 volts of electricity. Between each leg and the service neutral conductor, there is 120 volts of electricity.

If you have any questions, just ask away.
__________________
John
jrclen is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Double pole CH breaker ?? James Con Electrical 7 07-09-2008 11:41 PM
Three way light switches and double pole breaker ShawnColes Electrical 6 04-15-2008 08:25 PM
Novice Replacing 60 amp double pole breaker Ayreonna Electrical 40 02-19-2008 01:26 AM
Circuit breaker panel - Advice needed justtired Electrical 15 12-13-2007 05:55 AM
Problem with circuit breaker. HELP! spartanic Electrical 2 10-28-2007 03:09 PM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.