Switching Circuit

I rest my case.

If you think that is suppose to get me up set? it's quite the opposite. :)

Just goes to show how ignorant people can be, especially those that should know better.

Actually, this really amuses me because it's bringing out the real colors of many here.

It gets pretty bad when someone put themselves so high on the pedestal, and then, one comes along and knocks down that little world of theirs, throwing a temper tantrum in the process.

If others want to full in that mud hole to join them, so be it.

Have a nice day.

You can do it simply: one SPDT relay and one 3-way switch in the garage, and a regular switch in the house.

House Garage ------------------- ------------------------------------ | | | | | House | | | | Switch | | | | o----------------rly1---------------------+ | | +---o | | | | | | | | o-------o | | | hot----+-------------------+---o o---lite---+ | | | | | o-------o | | | neut---+ | | | Garage | | | | | | [Recpt] Switch | | | | | | | | | | +-------------------+----------------------------+ | | | | | ------------------- ------------------------------------

Switching the neutral is a NEC violation - the arrangement above avoids doing that.

Ed

finally, some one that knows something!

I take my hat off to you sir! :)

:Switching Circuit : :A buried wire between house and garage has only 3 conductors. How do you :utilize them to provide both constant power from house to garage, and 3-way :switching for lights in the garage at either house or garage? : :I used two 3-way switches and a relay. : :

: :Jon :

What you are doing is simply a 2 way switching system - not 3 way.

I don't know what your wiring rules say but where I come from it is illegal to allow lighting circuits to connect to GPO's for use with general appliances. At most lighting circuits can supply lights only or lights and small fixed items such as exhaust fans in toilets or bathrooms. All GPO's MUST be on separate circuits wired from the distribution board and such outlets are NOT to be set up as 2 way switching circuits.

John Field's solution is eminently suitable for a lighting only circuit and I use several such examples in my home.

No, Maynard has been a nutcase all along.

--
The movie \'Deliverance\' isn\'t a documentary!

On a sunny day (Sun, 11 Oct 2009 21:39:49 -0400) it happened Jamie wrote in :

Yea, but it swallows relay current if house swich left on 100% of the time.

What we need a a PIC solution :-) LOL

ou

ay

If you only want to draw power when the light is on:

. ----------------------------------------------------+----Outlet ! D1 . D3 ! ! O----!

Yes, it's tragic, a real strain on the budget. The relay coil (e.g Omron G2R) draws 7.5 mA at 120 VAC when the house switch is on. At say 10 cents per kwh, it would cost you 78.84 _cents_ per _year_ if you left the house switch on 24/7.

Ed

Yes, you could also use magnetic toggle or rotary relays with a momentary switch at any point on the line. We do that here for our garage using a rotary relay. We have 3 operating points in the garage and one in the house using 3 wire/w grd in a sealed PVC pipe under ground. We also have a #6 4 conductor cable running out there. That cable runs outlets and some heavy equipment.

.

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 |

Thommie CTO yr wrong ... is what the code says as ...

Steve Wynn is wrong ... Both unemployed , employed and Millionaires shoot themselves ... your earlier quote was better. Employment is about utility maximization .

Yr friend

| JimmyThumbsun TOC | GIRLIES | | Anul Innovations,Co | at all |

I love to drink wine. Sometimes I even vomit it when drunk

--
Assume away.

I\'ve decided to unplonk you because of the "dry contact" thing which, it
seems, you seem to think you know something about. 

Apparently, you don\'t, and the record should be set straight and you,
put in your place.

The most widely accepted meaning is that of a set of contacts which
neither makes nor breaks current.  Google "dry contact."

The second meaning is that of a set of low current, usually precious
metal covered contacts which need no "wetting" current to operate
properly; that wetting current being used to blast off oxides or other
contaminants at the contacts\' contact point which would cause the made
contact resistance to rise to an unacceptable value.

So, using a dry contact of either variety, how would you implement:

"How ever, if you had suggested putting a relay in place of the
lamp node in your schematic to drive the lamp with a dry contact, I 
would not of rejected the idea." ?

There is a difference between wetting contacts and having dry contacts.

They are not related.

"Wetting" is a process that helps keep the surface electrically clean by means of small arching and the reactions that follows. It has nothing to do with the term "Dry contacts"

In Terms EE, a Dry contact is one that has no connection to any other body,component, voltage or other contact assemblies. In other words, totally isolated.

To give a classical example of a non-dry(WET) contact in a relay would be like those used in auto's. Where one contact would be connected to the (+) source along with the coil, also connected to the (+) source with in it's own body. By bringing the other side of the coil to (-, 0 Volts), the contact now makes and that can drive a heavy load. This type of relay only has 3 wires, which makes it a WET contact type.

Or, the contact may just be connected to the (+) only and the coil is totally controlled else where. The fact that one part of the contact has voltage on it or maybe joined with some other circuit ,makes it a WET contact.

Example 2: PCL outputs (replay types), until you tie the COM to a source for each Relay group, these contacts are considered DRY.

Of course, any DRY contact becomes a WET contact as soon as you attach it to something that most likely will have energy at some point or path.

Have a good day.

you=20

3-way=20

John F you should have looked at his link.

Though the circuit you presented does work, it is not the circuit by which 3-way switches are normally wired. Nor does it meet code for the same reasons Bryce identified. =20 =46inally hot, neutral, and ground use up the three conductors and another wire or an alternate signaling method is required to meet design goals and be code compliant.

Go away, you know nothing freak.

it

would

source

contact

No sale here. Not for automotive usage (except for ignorant backyard wannabes), nor for PLC usage (except for some incompetents twits that will wreck your system eventually).

you=20

3-way=20

illegal to

appliances. At

items

separate

be set up

and I

3 way lights are very common, but they are NOT wired per John Fields' circuit.

up

I think the confusion is what does "3-conductor" mean?

14-2 has three conductors, counting ground.

14-3 has four conductors, counting ground. ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.