Basic 12V Wiring Diagram Components and Symbols

Every wiring diagram—no matter how simple or complex—is built from a few core elements. Understanding these categories makes it much easier to break down and interpret any system. Once you can identify these six elements in a diagram, you can quickly understand how the system operates. Common Electrical Wiring Symbols (With Examples) Power Source (Battery) […]

What are Electrical Wiring Diagrams

Electrical wiring diagrams are the universal language of electrical systems. Whether you’re working on a vehicle, boat, trailer, piece of heavy equipment, or an off-grid setup, wiring diagrams provide a clear and standardized way to understand how everything connects. Instead of relying on lengthy written explanations, these diagrams use simple symbols to represent components like […]

Heavy-duty toggle switch comparison

Heavy-Duty Toggle Switch Comparison Charts

When selecting heavy-duty toggle switches for automotive, marine, or industrial applications, buyers often face a choice between Del City options and established brands like Carling Technologies and Cole Hersee. The charts below compare Del City heavy-duty toggle switches with the comparable Carling’s F-Series and G-Series toggles and Cole Hersee toggles. We’ll evaluate key factors like […]

12V Switch Wiring Diagrams

When working on 12V automotive or industrial electrical projects, visualizing how a switch functions can be the key to wiring it correctly—and safely. While terms like SPST, SPDT, DPST, and DPDT may sound like alphabet soup at first, they each represent a specific type of switch with a unique wiring configuration. To make things clearer, […]

Solenoid cut-away

How to Test a Solenoid- A Step by Step Guide

Wiring and power systems can be complex—especially when it comes to components like solenoids. Whether you’re working on a boat, RV, industrial equipment, or another DC-powered system, a solenoid plays a critical role in controlling electrical current.  So how can you tell if your solenoid is working properly? Follow this step-by-step guide to test your solenoid and […]

The inside of a solenoid with labels

What Is A Solenoid?

Overview Often times when working on high amperage applications a solenoid is incorporated into the wiring system. This is due to their ability to control a large output of power with very little power input. But, what is a solenoid? Some would call them “relay switches”, but really they are just giant relays – not switches […]

Group of toggle switches

Single Pole vs. Double Pole Switches: What’s the Difference?

When working with 12V electrical systems—whether in a custom car build, an off-grid solar project, or an industrial control panel—choosing the right switch is more than just picking something that looks good on the dash. Two of the most common types you’ll run into are single pole and double pole switches. Understanding the difference can […]

Toggle Switches wired

How to Wire a Toggle Switch

Learning how to wire a toggle switch is simple. Using a toggle switch to actuate an electrical application is very common. You are able to hook up anywhere from 1 to 4 different accessories, depending on the configuration of your switch. Here we will wire a SPST (single pull, double throw) and a DPDT (double […]

Carling Switch actuators lined up with a white background

Choosing a Custom Carling Rocker Switch

  Durability and reliability is essential. With the Carling V-Series, you get both customized to your needs. With the rigorous testing and high Carling standards, these Carling rocker switches are perfect for marine panels, trucks, buses, trailer, construction, farm, and recreation equipment. What I love about this line is the versatility. So many of my customers in […]

Cole Hersee Plastic Solenoids

Cole Hersee plastic solenoids are constructed of glass-filled nylon, making them extremely light weight and durable. They are naturally resistant to corrosion compared to traditional metal housing solenoids. These plastic solenoids are resistant to high or low temperatures (-40°C to 60°C) allowing them to be used in a wide variety of applications. Intermittent & Continuous […]