How To Run A 30 Amp Circuit For An RV?

Motorhome fanatics know how good it feels to have a flawless experience when camping. The last thing you’d want is current overload issues damaging your appliances. As such, you should take the necessary precautions to be on the safe side. 

Having circuit breakers in place is the best thing you could ever do. It doesn’t matter whether you’re using electricity or running appliances on propane. Circuit breakers go a long way because they only trip when there’s an overload.

How to Run a 30 Amp Circuit for an RV

For you to effectively run a 30 amp circuit, you’ve to first understand the basics surrounding electrical and RV wiring. The process is straightforward but also very risky. Even if you’re handy with electrical connections, always double-check before switching on the power. If you trust your skills, follow these steps to install a 30 amp RV circuit. 

How to Run a 30 Amp Circuit for an RV
  1. Switch off the main breaker
  2. Mount the RV pedestal 
  3. Fit in a new breaker in the empty slot
  4. Run the wire through the piping
  5. Attach the wires to the breaker
  6. Run the cables through the exit box
  7. Power on the breaker and experiment!

For optimal safety, you should always use your non-contact voltage tester. If you don’t own one, get one. The cost to install 30 amp RV outlet is not that high. You should get a professional to do the job. Usually, even when you disengage the main breaker, the naked wires will still have current on them for some time. 

Do not start working without confirming whether they have current passing through them. Also, when you start working, it’s advisable to stick a note on the main breaker so that no one switches it on as you work. Having everything ready is also crucial, especially a 30 amp RV power outlet box with breaker. 

What Size Breaker Do I Need For A 30 Amp Rv Plug?

The majority of RVs and travel trailers work perfectly with a 30 amp RV plug. Now, you need a 30 amp circuit breaker for easy and simple installation for this plug. But, you could also use a 15/20 amp circuit breaker to avoid damaging your recreational vehicle, although carefully.

In this case, you could use a 15, 20, or 30 amp adapter. But, you should take greater caution because that’s not what the RV is meant for. If you have to use what is not meant for your RV, it’s better to involve a technician, as it comes with more risks. 

What Size Breaker Do I Need For A 30 Amp Rv Plug

For a breaker less than 30 amps, you’ll also need an outdoor-rated power cord. Anything less than that cannot handle the amperage, increasing the risk of damage. The recommended cable length should be very short. 

Caution: the connection may work, but it should only be for short-term operations because the cords are not designed to handle such high amperage. 

How Do You Wire A 30 Amp Breaker?

Wiring a 30 amp circuit breaker isn’t necessarily easy. Thankfully, you can find a 30 amp circuit breaker wiring diagram to guide you. You have to know the right wire to use and how to use them for maximum safety. These are the simple steps to follow:

How Do You Wire A 30 Amp Breaker
  1. Turn off the main breaker 
  2. Dislodge the screws attached to the panel door
  3. Confirm there’s no current flow in your main breaker
  4. Identify the free port where you’ll fix your 30 amp circuit breaker
  5. Remove the external insulation layer of your circuit and ground wires
  6. Connect the wires to your 30 amp single pole breaker box 
  7. Fasten the wires in the RV plug
  8. Horizontally place your circuit breaker into the panel
  9. Fix the panel door and dead front lid  

Important: Every 30 amp shore power outlet must be wired with a single-pole breaker measuring 12 volts on both the hot and neutral contacts. 

What size wire for 30 amp RV Service?

Safe wiring of a 30 amp RV service will require a wire gauge of 10. It’s very important to use wires that correspond to the rated amperage to avert malfunctioning. You may need to use a travel trailer 30 amp sub panel depending on what you’re using.

Is a 30 amp RV Plug 110 or 220?

Generally, a 30 amp RV plug is 110V. Even for residential settings, what you need is a 30 amp rv outlet box with 110v outlet. 

What size wire for 30 amp RV Service

How to Wire a 30 Amp Single Pole Breaker?

Single pole circuit breakers are those with one switch and a 120V handle. Their amperage ranges from 15 to 20 amps. They are usually installed in an electrical 30 amp single-pole breaker and then connected to a single breaker. Below are the steps to follow. 

30 Amp Single Pole Breaker
  1. Put on rubber-soled shoes for optimal safety
  2. Switch off the main power supply
  3. Remove the cover
  4. Set your multimeter to ‘Volts AC’ and check if there’s currently passing through
  5. Find an ideal place for the 30 amp breaker next to the existing breaker 
  6. Set your 30 amp breaker to OFF and fit it securely
  7. Strip about 0.5 inches of your insulation from the hot and neutral wires
  8. Unscrew the connection terminals and put each wire in its right terminal
  9. Fasten the screws until the wires hold firmly
  10. Wipe the panel to clear any debris that may trigger short-circuiting
  11. Fix the cover back onto the panel and tighten it
  12. You’re done! Now test your 30 amp single pole breaker.

Please note that you need to take safety precautions. Handling electricity is probably the riskiest thing a novice can try. DIYs aren’t encouraged for first-timers, whether at home or in an RV park. 

What Does A 30 Amp RV Plug Look Like?

Normally, a 30 amp RV plug comes with three prong outlet because it is meant for recreational vehicles with relatively low power load. The three prong receptacles are a 120V hot wire, a ground wire, and a neutral wire. The ground wire is necessary and transmits current under short circuits. 

What Does A 30 Amp RV Plug Look Like


Just like you consider breakers for your home, you also need to have them for your RVs. They come in handy when there’s a power overload that may damage your appliances. We believe you now have sufficient knowledge on how to do the necessary installations. 

But, as we’ve cautioned, be careful every step of the way. If you’re doing it for the first time, get an expert to help you out. You can then watch what they do and learn. It is better to be safe than sorry.