What an electrical hookup does and why you need one
An electrical hookup at a campground connects your motorhome to shore power — the same kind of electrical service that powers a house. Instead of running your engine or onboard generator to power lights, appliances, and air conditioning, you plug into a pedestal at your campsite and draw power from the campground's electrical system. This saves fuel, reduces engine wear, and lets you run multiple high-power devices at once without draining your battery or overheating a generator.
Most campgrounds that offer hookups have pedestals scattered throughout the grounds, each one serving one or two campsites. The pedestal holds electrical outlets in different configurations depending on the campground's age and the power level available. Understanding what you have and what your motorhome needs prevents damage to your rig and keeps you from arriving at a site only to find the outlet doesn't match your plug.
Key Takeaways
- Motorhomes use 30-amp or 50-amp shore power connections, and you must know which one yours requires before booking a site.
- A 30-amp outlet looks like a three-prong plug; a 50-amp outlet has four prongs and is larger — they are not interchangeable without an adapter.
- You need a shore power cord rated for your motorhome's amperage, and the cord must be long enough to reach from the pedestal to your rig without stretching tight.
- Plugging in incorrectly or using the wrong adapter can damage your motorhome's electrical system, so matching your plug to the outlet is essential before you connect.
- Many campgrounds offer only 30-amp service, even if your motorhome can handle 50-amp, so always confirm what is available when you book.
30-amp versus 50-amp service: which one your motorhome uses
Your motorhome's electrical system is designed for either 30-amp or 50-amp shore power. The difference is the amount of electrical current available. A 50-amp system delivers roughly twice the power of a 30-amp system, which means you can run more appliances at the same time without tripping a breaker. Larger motorhomes — typically Class A and larger Class C models — usually come with 50-amp service. Smaller Class C and Class B motorhomes often have 30-amp service.
Check your motorhome's documentation or look at the main electrical panel inside your rig to find out which service you have. The panel will show the amperage rating, or you can look at the shore power inlet on the outside of your motorhome — the socket where you plug in the cord. A 30-amp inlet is smaller and has three prongs; a 50-amp inlet is larger and has four prongs. If you are unsure, ask the dealer or the previous owner before you book a campground.
Understanding the outlets you will find at campgrounds
Campground pedestals typically offer a mix of outlet types because different motorhomes need different connections. The most common are 30-amp and 50-amp outlets, but you may also see standard household 120-volt outlets (the kind you use at home). Some older or smaller campgrounds have only 30-amp service; newer or larger ones often have both 30-amp and 50-amp available.
A 30-amp outlet has three round or flat prongs arranged in a specific pattern. A 50-amp outlet has four prongs — two large and two smaller — and is noticeably bigger. The prong configuration is different between the two, so a 30-amp plug will not fit into a 50-amp outlet and vice versa. This design prevents you from accidentally plugging a 30-amp motorhome into a 50-amp pedestal or the other way around, which would damage your electrical system.
When you arrive at a campground, look at the pedestal before you unhitch or set up. Confirm that the outlet matches your motorhome's inlet. If the campground has only 30-amp service and your motorhome requires 50-amp, you will need to find a different campground or use your onboard generator instead.
Choosing and using the right shore power cord
Your shore power cord is the cable that connects your motorhome to the pedestal. It must be rated for the amperage your motorhome uses — a 30-amp cord for a 30-amp system, or a 50-amp cord for a 50-amp system. Using the wrong amperage cord can overheat the cable and create a fire hazard. The cord also needs to be long enough to reach from the pedestal to your motorhome's inlet without being stretched tight or kinked, which damages the insulation.
Most motorhome owners use a cord between 25 and 50 feet long, depending on how far the pedestal is from their site. A 25-foot cord works for most campgrounds where the pedestal is close to the parking spot. If you frequently camp at sites where the pedestal is farther away, a 50-foot cord gives you more flexibility. Cords longer than 50 feet can cause voltage drop — a loss of power that makes your appliances run less efficiently — so avoid going longer unless necessary.
Store your cord in a dedicated bag or reel to keep it clean and protected from damage. Before each trip, inspect the cord for cracks, cuts, or exposed wires. If you see damage, replace the cord rather than trying to repair it. A damaged cord is a safety hazard and can fail while you are using it.
The steps for connecting your motorhome safely
Before you plug in, turn off the main breaker inside your motorhome. This protects your electrical system from a power surge when you connect. Next, inspect the pedestal outlet to make sure it is clean and dry. If water or dirt is visible, wipe it out gently with a dry cloth or ask the campground staff to clean it.
Unwind your shore power cord fully and lay it out in a straight line from the pedestal to your motorhome's inlet. Do not coil it tightly or leave loops, because coiled cables can overheat. Plug the cord into the pedestal first, then walk to your motorhome and plug the other end into your inlet. Make sure both connections are snug and fully seated — a loose connection can arc and damage the plug or inlet.
Once the cord is connected, turn the main breaker back on inside your motorhome. Check that your lights and appliances are working. If nothing powers on, or if you smell burning or see sparks, turn off the breaker when ready and unplug the cord. Do not try to troubleshoot the problem yourself; contact the campground staff or a may have access to RV technician.
What to do if your motorhome and the pedestal do not match
If your motorhome has a 50-amp inlet but the campground has only 30-amp service, you cannot safely use an adapter to make them work together. Adapters exist, but using one to plug a 50-amp motorhome into a 30-amp pedestal will overload the pedestal's circuit and create a fire hazard. The campground's electrical system is not designed to deliver 50-amp power, and forcing it to try will damage the pedestal and potentially the campground's entire electrical infrastructure.
Your options in this situation are to find a different campground with 50-amp service, use your onboard generator to power your motorhome, or run only essential appliances on a reduced power budget. Some motorhome owners with 50-amp systems carry a 30-amp adapter for emergencies, but this should only be used if you are willing to limit your power use significantly — run your air conditioning or your water heater, but not both at the same time.
If your motorhome has a 30-amp inlet and the pedestal offers only 50-amp service, you can use a 50-amp to 30-amp adapter. This adapter reduces the available power to match your motorhome's system and is safe to use. However, confirm that the adapter is rated for your specific outlet configuration, because different 50-amp pedestals use different prong arrangements.
Protecting your motorhome's electrical system while plugged in
Once you are connected to shore power, your motorhome's onboard battery charger and converter take over, keeping your batteries charged and powering your 12-volt systems. However, power surges from the campground's electrical system can damage sensitive electronics like your refrigerator, water heater, or entertainment system. A surge protector is a device that plugs into the pedestal and protects your motorhome from voltage spikes.
Surge protectors come in two types: basic models that straightforward block power surges, and smart models that monitor the incoming power and shut off automatically if the voltage is too high or too low. A smart surge protector is more expensive but offers better protection, especially if you camp at older campgrounds with unstable electrical systems. If you use a surge protector, plug it into the pedestal, then plug your shore power cord into the surge protector.
Before you leave the campground, unplug your shore power cord from both the pedestal and your motorhome. Leaving the cord plugged in after you disconnect can damage the plug or inlet over time. Coil the cord loosely and store it in its bag until your next trip.
Frequently Asked Questions
Can I use a regular household extension cord instead of a shore power cord?
No. A household extension cord is not rated for the continuous high-current draw that a motorhome demands, and it will overheat and potentially catch fire. Shore power cords are specifically designed and insulated for this use. Always use a cord rated for your motorhome's amperage.
What does it mean if the pedestal has multiple outlets?
Most pedestals have two or more outlets so that two motorhomes can share the pedestal if the campground is full. Each outlet is independent, so you use only the one assigned to your site. Do not plug into an outlet that belongs to another campsite.
Do I need to turn off my generator when I am plugged into shore power?
Yes. Running your generator while plugged into shore power can damage both systems and create a safety hazard. Turn off your generator before you connect to the pedestal, and do not turn it back on until you have unplugged from shore power.
What should I do if my shore power cord gets wet?
Unplug the cord when ready from both ends and let it dry completely before using it again. Do not use the cord while it is wet, even if it seems to be working. Wet cords create a shock hazard and can damage your motorhome's electrical system.
Can I leave my motorhome plugged in when I am not using it?
Yes, but turn off the main breaker inside your motorhome if you will be away for more than a few days. This prevents your battery charger from running continuously and reduces the risk of electrical problems. Always unplug before you leave the campground.