relays

If you use 2 poles of a 6 amp(very common) DPST(or any DP configuration) mini toggle you can avoid the complexity of relays completely.

You've got 2 poles - use two 18 gauge wires.

Automation Direct has some that I like. They are 15A, lighted, and have a test button. Lot of nice features. Base is a bit pricey but that is very nice also, has latch to hold relay with flat place for a label. Also available in quite a few different voltages and number of poles.

If the attached link above does not work go to:

http://www.automationdirect.com/

Then go to:

Relays/Timers

Electro-Mechanical Relays

Square/Cube Relays

General Purpose, 15A (781 / 782 / 783 / 784 Series)

Last method is kinda convoluted, but for some reason I have been unable to make links to this site work here on the forum?

If you go the relay route, look into these low-cost relay modules you can get on eBay for less than $2 per relay - and that includes shipping cost (albeit from Asia).  Example of a 4-channel version (common types are 1, 2, 4 or 8 relays per module):

They include screw terminals for the 10 Amp relay contacts.  The relays are controlled by low voltage (5V or 12V are common types).  The relay method has lower currents running behind your control panel thereby giving you more choices on switches as well as smaller gauge wiring for the often tight spaces.  The control voltage (e.g., 5V or 12V) can come from a DC wall-wart power adapter ($2-3) or derived from an accessory AC voltage with a few components.

I have a bunch of these in various voltages. I would use 24VDC ones. They are plug in with screw terminal sockets DPDT 10 amp contacts. Relay and socket at my cost is $8 each. You could do it with one 18 VAC supply and one bridge and capacitor.

Relay hookup for panels is described here

www.jcstudiosinc.com/BlogShowThread?id=635

Dale H

Another option is 12VDC automotive relays.  They can be had on eBay for a few dollars including sockets.  You can also buy them at your local auto parts store.

I built this system in 1999 for a customer wanting block control for a layout with 160 blocks using 160 Magnacraft W88ACPX-6 Relays. The relay coil operates at 12VAC and the contacts are DPDT 8 amp.