One Plug Into Two Outlets - Electrical - Page 2 - DIY Chatroom Home Improvement Forum
Advertisement


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

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

Reply
 
Thread Tools
Display Modes
Old 08-13-2010, 08:59 PM   #16
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 2,000
Default


Quote:
Originally Posted by Proby View Post
if there would be any negative effect when the thermostat turns the fan on and backfeeds the timer, and vice versa.
If both have actual contacts, no. If either has a Triac as the switching element, then possibly no.

This problem seems to be unsolvable given the constraints. What requirements/conditions can be relaxed?
Yoyizit is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-13-2010, 11:48 PM   #17
Newbie
 
Join Date: Aug 2010
Posts: 8
Rewards Points: 10
Default


Can this be done safely with two 120 volt relays?
klimt is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-14-2010, 12:44 AM   #18
Wire Chewer
 
Red Squirrel's Avatar
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 3,550
Rewards Points: 528
Default


If you're willing to learn (we can help) you can wire something up fairly easy.

Get two power cords that you don't mind cutting the female end off (or buy the male ends and some wire), a wiring box, and a receptacle as well as switch plate for it. Hook up the two hots to the plug hot side and two neutrals to the plug neutral side. Neutral is the big blade, hot is the small. Normally neutral is white and hot is black but this can differ on an appliance cord. Just use a continuity test from the blade to the wire end to find which is which.

Ensure you don't mix this up!

Now you have a receptacle box that can plug in twice. Plug it into your two sources. It is VERY important that these two sources are on the same leg. If not, you will get a very nasty 240 volt short circuit. A quick way to check if two plugs are on the same leg is to do a voltage test between the two hots. It should read 0 volts. If it reads 240 then don't use these two. An easy way to ensure it's the same leg just use two plugs from a power bar, then it does not matter where you plug it in.

This contraption is not really safe if misused, but it could work for what you want. If you have one plug plugged in, DO NOT touch the blades of the other!
Red Squirrel is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 08-14-2010, 06:12 AM   #19
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 8,597
Rewards Points: 2,800
Default


Quote:
Originally Posted by Red Squirrel View Post
IfGet two power cords that you don't mind cutting the female end off (or buy the male ends and some wire), a wiring box, and a receptacle as well as switch plate for it. Hook up ///
Ensure you don't mix this up!

Now you have a receptacle box that can plug in twice. Plug it into your two sources. It is VERY important that these two sources are on the same leg. If not, you will get a very nasty 240 volt short circuit. A quick way to check if two plugs are on the same leg is to do a voltage test between the two hots. It should read 0 volts. If it reads 240 then don't use these two. An easy way to ensure it's the same leg just use two plugs from a power bar, then it does not matter where you plug it in.

This contraption is not really safe if misused, but it could work for what you want. If you have one plug plugged in, DO NOT touch the blades of the other!
This contraption, too, is incredibly dangerous. Someone else could be electrocuted if one of the plugs is accidentally disconnected and he tries to plug it in again. Or if someone else unplugs one of the cords to use the receptacle (or the plug in timer unit) for some other purpose, intending to put it back later.
__________________
Stick to your lawn watering schedule until it really starts to pour. After the storm you have only the same number of rest days you always had and then you need to start watering again.

Last edited by AllanJ; 08-14-2010 at 06:16 AM.
AllanJ is offline   Reply With Quote
Old 08-14-2010, 06:51 AM   #20
Member
 
Join Date: Mar 2007
Location: Eighty Four, Pa.15330
Posts: 1,597
Rewards Points: 1,192
Default


Thanks allanj! That was bad advice to make a "contraption"
bobelectric is offline   Reply With Quote
Old 08-14-2010, 11:19 AM   #21
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Rewards Points: 2,000
Default


So is there no reasonably safe way to wire this up? C'mon. . .
Yoyizit is offline   Reply With Quote
Old 08-14-2010, 11:21 AM   #22
Electrician
 
Proby's Avatar
 
Join Date: Jul 2010
Location: NJ
Posts: 818
Rewards Points: 500
Default


Quote:
Originally Posted by Yoyizit View Post
So is there no reasonably safe way to wire this up? C'mon. . .
Hardwire it with the proper timer and thermostat.

Or use the timer and thermostat he currently has with cord&plug connected relays.
__________________
Anything fun is either illegal, immoral, or fattening.
Proby is offline   Reply With Quote
Old 08-14-2010, 03:15 PM   #23
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 8,597
Rewards Points: 2,800
Default


I'm not sure whether they make a timer that fits in an outlet box, but they do make line voltage electric switching (electric heat) thermostats that fit in an outlet box.

I was thinking of a timer module and a thermostat together in a large metal work box (junction box; j-box) with everything wire nutted together so only one power cord with a plug comes out. The receptacle for the fan may either be in another gang of the box or at the end of another cable coming out of the box.l
__________________
Stick to your lawn watering schedule until it really starts to pour. After the storm you have only the same number of rest days you always had and then you need to start watering again.
AllanJ is offline   Reply With Quote
Old 08-14-2010, 09:48 PM   #24
Wire Chewer
 
Red Squirrel's Avatar
 
Join Date: Jun 2009
Location: Ontario, Canada
Posts: 3,550
Rewards Points: 528
Default


Quote:
Originally Posted by AllanJ View Post
This contraption, too, is incredibly dangerous. Someone else could be electrocuted if one of the plugs is accidentally disconnected and he tries to plug it in again. Or if someone else unplugs one of the cords to use the receptacle (or the plug in timer unit) for some other purpose, intending to put it back later.
Yeah, that's why I gave a warning. It would work, and be reasonably safe if it's left untouched, but there is still that potential hazard if it gets unplugged.

I suppose another way could be to have that setup all within an enclosed compartment, with one plug.

So 1 plug goes to a box of some sort, then in that box there is the contraption with the timer and thermostat within, and then a plug to plug in the fan or other device that needs to be controlled by two "sources". The box would have a cover that is screwed on. Maybe the timer and thermostat controls could be exposed somehow to be able to change the settings.

Come to think of it, maybe it would be safer to have the thermostat and the timer control a relay instead. This relay would then control whether or not there is power that comes out.
Attached Thumbnails
One Plug Into Two Outlets-contraption.jpg  

Last edited by Red Squirrel; 08-14-2010 at 09:55 PM.
Red Squirrel is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply


Thread Tools
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
2 wire outlets: connect neutral to ground? border collie Electrical 19 04-12-2013 12:29 PM
Strange acting outlets ds211 Electrical 5 07-13-2010 12:32 PM
Unpolarised US Type 2 Plug to UK Plug. razorcut Electrical 19 05-18-2009 09:49 AM
1990 Bounder Motorhome 3 prong outlets actally have no ground connected!! Help! Holering Electrical 5 03-30-2009 12:59 PM
outlets work, but barely (?) joeyboy Electrical 7 08-27-2008 08:37 AM




Top of Page | View New Posts