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HeksTovenaar
HeksTovenaar, Electrical Engineering-expert
Category: General
Satisfied Customers: 3
Experience:  Electrical Engineer
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I need to know of a piece of hardware that will cut the

Customer Question

I need to know of a piece of hardware that will cut the power to wire 1 when wire 2 gets power and reconnect the power to wire 1 when the power to wire 2 gets disconnected. Something like a toggle switch but one that is powered by electrical current the a wire. I have some engineering background but extremely limited so the simpler the solution the better. I'm ok with building it if need be but I would prefer to purchase it instead.
Submitted: 1 year ago.
Category: Electrical Engineering
Expert:  kabari75 replied 1 year ago.

Hi,

I have few suggestions that you can try. How much power are you trying to get through the systems. If it a low power, you can use double pall double throw relay and use the coil connected to power from wire 2. When the power is off on line 2, line wire connected 1 is always connected.

See the diagram below

https://search.yahoo.com/search;_ylt=A0LEVy2LsFNWl_cAgV5XNyoA;_ylc=X1MDMjc2NjY3OQRfcgMyBGZyA3lmcC10LTkwMQRncHJpZANZWkJvU0oyVFRndTFIbTdXSzFIZVdBBG5fcnNsdAMwBG5fc3VnZwM5BG9yaWdpbgNzZWFyY2gueWFob28uY29tBHBvcwMyBHBxc3RyA2RwZHQgcmVsYXkEcHFzdHJsAzEwBHFzdHJsAzE4BHF1ZXJ5A2RwZHQgcmVsYXkgZGlhZ3JhbQR0X3N0bXADMTQ0ODMyNTI5MQ--?p=dpdt+relay+diagram&fr2=sa-gp-search&fr=yfp-t-901&fp=1

Customer: replied 1 year ago.

It's only going to be 12v dc power so not too much. I do also need it to be weatherproof as it will be exposed to the elements at almost all times.

Expert:  kabari75 replied 1 year ago.

Ok,

If that is the case, you will need a 12 Volts DPDT relay.

See the link below

http://www.ebay.com/sch/i.html?_nkw=12+volt+dpdt+relay

One of these would work. You will need to wire it and based on the diagram on the side of the relay.

When it come to waterproofing the system, I would suggest purchasing a weather proof epoxy that can be used to cover the terminal after all the connections have been made and the system has been tested. This way you have room to make changes and get to test your circuit. After everything is working, then you will mix the epoxy and apply it on the terminals and cover the relays.

Here is link for the material

http://www.ebay.com/itm/EPOXY-RESIN-CIRCUIT-BOARD-POTTING-COMPOUND-NON-CONDUCTIVE-WATERPROOFING-48OZ-/310186942108

Thanks