CRI) of 82 to show the true colors of objects and surroundings.

A rocker switch allows for two levels of light, but the fixture can also be dimmed with an electronic low-voltage (ELV) dimmer. Up to 10 under-cabinet fixtures can be joined in a series with our interconnect cables. The low-profile white aluminum fixture has 120V AC operation and is designed to last 30,000 hours—three times longer than equivalent fluorescent fixtures.

5-pin SPDT (single pole, double throw) automotive relay.

Relays are essentially two parts in one package. The first part is an inductive coil (pins 85 and 86). This coil is the “trigger” function of the relay. By applying both a positive (+) and ground (-) to the contacts, current passes through the coil. When current passes through the coil, a magnetic field is generated and moves the switch (the arrow in the diagram). This is where the second part of the relay comes into play.

The second part of the relay is the “switch.” The switch has three interface contacts—common, normally closed, and normally open. “Normally” refers to the state of the relay not being energized.

While relays can be used for virtually any task, there are some very useful, simple applications for adding LED lighting to a vehicle. Please note that this wiring only pertains to the relay—not the wires in the vehicle. Before interfacing with a wire in a vehicle, always ensure you test the wire with a digital multimeter first to confirm circuit function.

Positive Switching

Positive switching is used for applications where the “trigger” for your switch or circuit is positive. This could be an ignition, brake, or reverse light wire for example.  This could be used for applications such as off-road light bars, work lights, additional brake lights, and other exterior lighting.

Negative Switching

Negative switching is used for applications where the “trigger” for your switch or circuit is negative. Negative triggers are often found in door, hatch, and trunk triggers as well as many interior switches. This could be used for applications such as footwell lighting, truck bed lighting, under-hood lighting, and other interior lighting.

Switch Activated With Ignition Override

This is useful for applications where you want to turn your light on or off with a switch but only want the light to remain on when the car is running or key is in the “ignition” position. The main advantage to this is—even if the switch is left on—the light (or output circuit) will shut off when the key is turned off so that the battery will not be run down.

For technical questions, don’t hesitate to call us toll free at 866-590-3533. Our customer service and technical support teams are available from 8:30 a.m. to 8 p.m. CDT Monday-Thursday and 8:30 a.m. to 4 p.m. CDT on Friday.

There are instances where NEC and other regulators recommend dedicated circuits for certain loads. Typical loads to put on individual branch circuits include sensitive electronic equipment such as computers. In addition, water heating systems, large appliances, and other high capacity loads that zap power require a dedicated circuit.

Run cables all the way to the main service panel and avoid connecting to other existing circuits. The same conductor size should be used throughout the branch circuit.

Electric water heaters, HVAC equipment, hot tubs and other appliances should each have a nearby disconnect that is easily visible and accessible. The power disconnect can be provided by the main or sub panel breaker, a dedicated switch, or a power cord that can be unplugged.

The branch circuits should have adequate current carrying capacity, adequate and grounding.

Typical branch currents include: