Full Guide to Choosing The RV Extension Cord in 2024

This comprehensive guide will help you navigate the key factors to consider when selecting an RV extension cord, including amperage requirements, wire gauge, and length.

Whether your RV requires a 30-amp or 50-amp extension cord, understanding the differences can help you avoid electrical issues and keep your RV running smoothly. Let’s explore how to select the perfect extension cord to keep your RV powered.

Do You Need a Special Extension Cord for a Camper?

Unlike regular household extension cords, a special RV extension cord is built to safely extend the reach of your RV’s power supply. RV extension cords are heavy-duty and made to carry the higher current required by your camper's appliances and systems. Using a standard extension cord could lead to overheating, melting, or even fire hazards due to insufficient capacity for RV power loads.

Moreover, an RV extension cord provides the flexibility to connect to a power source when the distance is too far for your regular RV power cord, such as in poorly laid-out campsites or when using a generator. It ensures that your RV gets a safe and reliable power supply without risking voltage drops or damage to your equipment.

What Gauge Extension Cord for RV?

Extension cords are rated using the American Wire Gauge (AWG) system, where a lower gauge number means a thicker wire capable of carrying more current. Here’s a breakdown of the most common gauges for RV extension cords:

10-Gauge Extension Cord:
A 10-gauge extension cord is one of the most popular choices for RVs, especially for those with 30-amp circuits. This gauge can handle up to 30 amps and is suitable for small to medium-sized RVs with moderate power needs, such as running basic appliances.

8-Gauge Extension Cord:
An 8-gauge extension cord is thicker and can handle more power than a 10-gauge cord. This gauge is suitable for RVs with higher power demands, such as those drawing 50 amps, but only for short distances. For a 30-amp circuit needing to extend over 100 feet, an 8-gauge cord is a good choice.

6-Gauge Extension Cord:
A 6-gauge extension cord is the thickest commonly used for RVs, designed for 50-amp systems that require a substantial amount of power. This gauge is ideal for powering large appliances and maintaining high power levels over long distances. If your RV setup includes heavy-duty equipment or needs to draw a lot of current, a 6-gauge cord provides the necessary capacity.

Additional Considerations:

• For 15-amp circuits, a 14-gauge cord is adequate for up to 50 feet, while a 12-gauge cord can handle up to 70 feet. Avoid using a 14-gauge cord for longer distances to prevent overheating and voltage drop.
• For 20-amp circuits, a 12-gauge cord works well up to 50 feet, but a 10-gauge cord can extend safely up to 85 feet.
• For 40-amp and 50-amp circuits, opt for thicker 8-gauge or 6-gauge cords to handle the increased current and prevent power loss or damage to your equipment.

How to Choose The Right Extension Cord for RV?

Determine Your RV's Amperage Requirements

First, identify your RV's amperage needs, which are typically either 30 amps or 50 amps. This information can be found in your owner's manual or on a label near your RV's power inlet. Selecting a cord that matches or exceeds your RV's amperage is essential to prevent overloading. 

Choose the Right Cord Length

Longer cords can result in a voltage drop, potentially causing issues like dimming lights or malfunctioning appliances. It's advisable to use the shortest cord necessary to minimize power loss. For most setups, a 25-foot cord works well for 30-amp RVs, while a 50-foot cord is more suitable for 50-amp RVs.

Select the Correct Wire Gauge

The wire gauge determines the cord’s capacity to carry current. A lower gauge number means a thicker wire, which can handle higher amperage and reduce voltage drop. For a 30-amp RV, a 10-gauge extension cord is generally sufficient, while a 50-amp RV might require a thicker 6-gauge or 8-gauge cord to ensure safe power delivery.

Ensure Proper Connections

Verify that the extension cord's plugs match your RV's power inlet and the power outlet at the campsite or generator. Mismatched plugs can cause connection problems, overheating, or damage. If needed, use high-quality adapters designed specifically for RVs, but always prioritize a direct connection for safety.

How to Choose Between 30 Amp and 50 Amp RV Extension Cords?

30 Amp Extension Cord:

• Amperage Rating: Designed for RVs that require up to 30 amps of electrical current.
• Wire Gauge: Usually comes with a 10 AWG or 8 AWG wire gauge, capable of handling moderate power demands.
• Typical Uses: Suitable for smaller RVs and travel trailers with fewer appliances. It can comfortably power basic electrical needs like lights, small appliances, and a single air conditioning unit.
• Power Delivery: Provides up to 3,600 watts (30 amps x 120 volts).
• Plug Type: Features a three-prong plug (NEMA TT-30).

50 Amp Extension Cord:

• Amperage Rating: Supports up to 50 amps, catering to larger RVs with more significant power needs.
• Wire Gauge: Typically comes with a thicker 6 AWG or 4 AWG wire, allowing for higher current capacity.
• Typical Uses: Ideal for larger RVs and motorhomes with multiple high-draw appliances like residential-style air conditioners, electric water heaters, and larger kitchen appliances.
• Power Delivery: Provides up to 12,000 watts (50 amps x 240 volts).
• Plug Type: Comes with a four-prong plug (NEMA 14-50).

Key Factors When Choosing 30 Amp and 50 Amp Extension Cords

1. RV Power Requirements: Check your RV’s power needs on the label near the power inlet or in the owner's manual. Use a 30-amp cord for 30-amp RVs and a 50-amp cord for 50-amp RVs.
2. Appliance and Power Needs: For RVs with basic appliances, a 30-amp cord is sufficient. For those with high-power appliances like dual AC units, a 50-amp cord is necessary.
3. Future-Proofing: Consider a 50-amp cord if you plan to upgrade your RV or add more appliances in the future.
4. Campground Hookups: Most campgrounds offer both 30 and 50 amp hookups. Adapters can limit your electrical load and restrict appliance use.
5. Cord Length and Voltage Drop: Choose a cord length that matches the distance to the power source. Longer cords can cause voltage drops. A 25-foot cord works for 30-amp RVs, while a 50-foot cord suits 50-amp RVs.

What are the Best RV Extension Cords?

1. Filluck 50 Amp Generator Cord

The Filluck 50 Amp Generator Cord and Power Inlet Box is a reliable power solution for both home emergencies and outdoor activities. It provides a safe power supply during power outages, bad weather, or outdoor events like RV trips, picnics, and parties. 

Key Features:

• Fast Conductor: Available in 15 or 20-foot lengths, this extension cord uses STW 6/3 + 8/1 AWG wires for lower resistance and better conductivity. 
• Easy Installation: The power inlet box is made from durable, rust-resistant PC material and features four pre-drilled holes for easy assembly without tools.
• Stable and Waterproof: With a NEMA14-50P male plug and NEMA SS2-50R female receptacle, this cord provides a secure, waterproof connection. 

 2. Filluck 30 Amp Generator Cord

The 30 Amp Generator Cord and Power Inlet Box is a versatile power solution designed for home emergencies and outdoor activities. The green indicator light on the flip-top cover improves safety by guiding users in low-light conditions.

Key Features:

• Home Essential: Suitable for emergencies and outdoor use, this 30 amp generator cord and power inlet box deliver reliable power in various situations. 
• No Drilling Required: The anti-corrosion coated shell, spacious interior for better heat dissipation, and pre-drilled holes allow for easy assembly without tools.
• Stable and Waterproof: The NEMA14-30P male plug and NEMA L14-30R female receptacle with twist-lock design provide a secure, waterproof connection. 

FAQs about RV Extension Cord

1. can i plug my rv into an extension cord?

Yes, you can plug your RV into an extension cord, but there are important considerations. Make sure the extension cord is heavy-duty and rated for outdoor use, with sufficient amperage to handle your RV's electrical needs.

2. can i use a 15 amp extension cord for rv?

Using a 15 amp extension cord for your RV is generally not recommended. Most RVs require at least a 30 amp or 50 amp service, depending on the size and electrical load. A 15 amp cord may not provide enough power and can overheat.

3. how long can an rv extension cord be?

RV extension cords can typically be up to 50 feet long, but there are options available that can reach up to 100 feet. If you choose a longer cord, like 100 feet, make sure to use a thicker gauge (such as 6-gauge) to reduce the risk of overheating and ensure sufficient power supply to your RV.