What’s the Best Way to Splice the RV Fridge Wires to a Power Source?

Introduction

Wiring an RV fridge correctly is crucial for ensuring it runs efficiently and safely. Whether you're upgrading your RV’s power system or replacing an old fridge, splicing the wires properly can prevent electrical issues and prolong the life of your appliance. But what’s the best way to do it? Let’s break it down step by step.

Understanding RV Fridge Power Sources

RV fridges can run on different power sources, depending on their design:

• AC power (120V) – When connected to shore power.

• DC power (12V or 24V) – When running on RV batteries.

• Propane with electric ignition – Uses DC power for control boards and ignition.

Understanding your fridge’s power source will help determine the proper wiring method.

Tools and Materials Needed for Splicing

Before getting started, gather these essential tools:
✔ Wire strippers and cutters – For preparing the wires.
✔ Heat shrink tubing or electrical tape – To insulate the connection.
✔ Soldering iron and solder – For a strong, permanent bond.
✔ Crimp connectors and crimping tool – If soldering isn’t preferred.
✔ Multimeter – To test voltage and ensure a proper connection.

Step-by-Step Guide to Splicing RV Fridge Wires

Step 1: Turn Off the Power

Safety first! Disconnect the RV from shore power and turn off the battery switch to prevent electrical shock.

Step 2: Identify the Wires

Most RV wiring follows these color codes:

• Black or Red – Positive (+)

• White or Blue – Negative (-)

• Green or Bare Copper – Ground

Always double-check with a multimeter before proceeding.

Step 3: Prepare the Wires

• Cut off any damaged or frayed wire ends.

• Strip about ½ inch of insulation from each wire end.

• Ensure both wires are of the same gauge for a secure splice.

Step 4: Choosing the Splice Method

Soldering the Wires (Best Method)

• Twist the stripped ends together.

• Heat with a soldering iron and apply solder.

• Allow the solder to cool before moving the wire.

• Cover with heat shrink tubing for insulation.

Using Crimp Connectors (Alternative Method)

• Insert wires into a butt connector.

• Use a crimping tool to secure them.

Apply heat shrink tubing for added protection.

Twist-and-Tape Method (Not Recommended)

While some may just twist the wires together and wrap them in electrical tape, this is not a reliable long-term solution. Vibration from RV travel can loosen the connection, leading to power failures.

Step 5: Insulating and Securing the Connection

• Heat shrink tubing is the best way to protect the splice. Heat it with a lighter or heat gun until it shrinks tightly over the connection.

• If using electrical tape, wrap it tightly and secure it with zip ties for extra stability.