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 01-04-2011, 09:05 AM   #1
Newbie
 
Join Date: Dec 2010
Posts: 20
Share |
Default

2 wire thermostats in parallel?


I would like to wire two 240v baseboard heaters to a single 20amp circuit, and have each baseboard on its own thermostat. Wiring is 12/2 (black, white, ground only, no red) and combined wattage of baseboards is 3000w so everything is fine in that regard.

Now... i already have two 2-wire digital wall thermostats.

From my understanding I have 2 options.... install a junction box from the circuit breaker to split a separate 12/2 going to each thermostat and baseboard.

-OR-

Run the 12/2 to each thermostat in parallel, and then connect each thermostat to its baseboard.

So my question is... If i choose the (supposedly preferred) method of wiring the thermostats in parallel must those thermostats be 4 wire thermostats?

DragonFire is offline   Reply With Quote
Old 01-04-2011, 09:41 AM   #2
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,683
Default

2 wire thermostats in parallel?


NO.
What you will do is run the feed to the tstat, connect the tstat and the feed in and the feed out to the next tstat.
On the load side of the tstat you feed to the heaters.

__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 01-04-2011, 09:53 AM   #3
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


So you are saying it is possible and acceptable to use 2-wire thermostats wired in parallel?
DragonFire is offline   Reply With Quote
Old 01-04-2011, 09:54 AM   #4
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,683
Default

2 wire thermostats in parallel?


You are not wiring them in parallel.
They still control only one heater.
You are just paralleling the feeds to the heaters.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 01-04-2011, 10:31 AM   #5
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


ok, now I am getting somewhere. Earlier I specifically read on a google search form another forum posting that thermostats should be wired in parallel for this scenario... which now sounds to be wrong information, and of course creating all sorts of confusion for me trying to visualize things.

I don't suppose there is any simple diagram to help clarify the wiring, or a bit more detailed verbal walk-thru for this type of install? Once I get it clear, I plan to post my working diagram for approval before attempting it.

I can always go with the alternative method of using a junction box and splitting, but would really like to eliminate that especially since what I am wanting to do is a common task.

Thanks for taking the time to post.
DragonFire is offline   Reply With Quote
Old 01-04-2011, 10:42 AM   #6
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,683
Default

2 wire thermostats in parallel?


You are doing the same thing with a j box as I said.
You take the feed from the breaker to the first box with the tstat.
You pigtail that wire with the wire that feeds the tstat and the wire that feeds the next tstat.
At each tstat, you run a wire from the controlled side of the tstat to each heater controlled by that tstat.
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 01-04-2011, 11:12 AM   #7
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


Thanks jbfan,
I am now going to try to diagram as per your directions above and hopefully can post something back for confirmation later.
DragonFire is offline   Reply With Quote
Old 01-04-2011, 12:32 PM   #8
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


ok, here we go with my first stab at the diagram. Comments anyone?
Attached Files
File Type: pdf diagram1.pdf (10.9 KB, 289 views)
DragonFire is offline   Reply With Quote
Old 01-04-2011, 01:56 PM   #9
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,683
Default

2 wire thermostats in parallel?


Looks good!
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
The Following User Says Thank You to jbfan For This Useful Post:
DragonFire (01-04-2011)
Old 01-04-2011, 02:23 PM   #10
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


Quote:
Originally Posted by jbfan View Post
Looks good!
Awesome! Thanks for taking the time to explain everything in greater detail for me.
DragonFire is offline   Reply With Quote
Old 01-04-2011, 02:25 PM   #11
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,683
Default

2 wire thermostats in parallel?


Quote:
Originally Posted by DragonFire View Post
Awesome! Thanks for taking the time to explain everything in greater detail for me.
Not a problem, cause that what we get paid for!!!!!!!!!!!
__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 01-22-2011, 12:50 PM   #12
Newbie
 
Join Date: Dec 2010
Posts: 20
Default

2 wire thermostats in parallel?


Just a followup and thanks again to jbfan for the information. I was successful in my project and everything is working perfectly.

DragonFire 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
What type wire to use from transfer switch to outdoor outlet brjl Electrical 32 11-20-2013 08:36 AM
Proper Use of Green Wire Nuts HooKooDooKu Electrical 16 06-29-2012 06:41 PM
240v conduit with different gauge wires... Biospot Electrical 7 12-14-2010 07:07 PM
HALP! Master/Remote Dimmer troubles! Confuserated Electrical 9 02-12-2010 03:30 PM
hooking up dryer....bronx ny code SURFBUG Appliances 6 10-14-2008 09:41 PM




Top of Page | View New Posts

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