09-03-2017, 05:18 PM
relays are simple.
just think about having a switch inside of a switch. the heavy current side comes in on one terminal and out on a another. then a coil that takes small amount of current is activated by whatever you are switching. in this case, the rocker switch that is on the panel would apply current to the coil of the relay. when the coil energizes, it pulls down a contact that connects the tow heavy current side terminals that then applies the current to whatever you are turning on or off.
the relay just has to be rated for the voltage and current of the item you are switching.
the coil on the relay can be 12v or 120v (or alot of others as well but not applicable here)
on some relays you can have normally open or normally closed.
tom
just think about having a switch inside of a switch. the heavy current side comes in on one terminal and out on a another. then a coil that takes small amount of current is activated by whatever you are switching. in this case, the rocker switch that is on the panel would apply current to the coil of the relay. when the coil energizes, it pulls down a contact that connects the tow heavy current side terminals that then applies the current to whatever you are turning on or off.
the relay just has to be rated for the voltage and current of the item you are switching.
the coil on the relay can be 12v or 120v (or alot of others as well but not applicable here)
on some relays you can have normally open or normally closed.
tom
2002 45'8" Newell Coach 608 Series 60 DDEC4/Allison World 6 Speed HD4000MH