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I’m an Electrical Engineer: Here’s How to Not Get Shocked in Your RV

I’m an Electrical Engineer: Here’s How to Not Get Shocked in Your RV

Have you ever felt a strange tingling feeling or slight shock when you touched the outside or frame of your RV? If so, you’ve experienced an RV electrical problem called “hot skin.” RV hot skin can be as insignificant as a slight shock or deadly in other instances. That’s why RV electrical safety is so important.

I’m an electrical engineer with residential and RV expertise, and here’s my advice on how to not get shocked in your RV. 

Can You Get Electrocuted by an RV?

Yes, you actually can get electrocuted by an RV. Hot skin on an RV has electrocuted people before, but that’s not the only danger.

You can also get shocked by using the wrong extension cords and adapters or by not using safety devices like surge protectors and disconnect switches.

RV Electrical Safety Tips and Recommendations- RV Security and Safety Series Part 3

RV electrocution is not widely understood, but we hope to change that here. 

What Is ‘Hot-Skin?’

“Hot skin” on an RV refers to when the exterior of an RV, the frame, and the chassis become electrified by a stray electrical current. Hot skin can vary from a low current that just gives you a bit of a tingling feeling to a high current that can knock you down or even kill you.

It can occur on any kind of RV, new or old. It typically happens when the RV is plugged into an improperly wired outlet or if the RV itself is wired wrong.

Is Getting Shocked by an RV Deadly?

It’s not often that hot skin produces enough current to kill someone, but it has happened in the past. This story about the death of a 3-year-old highlights the dangers of this very real RV electrical threat. 

The child was exiting the camper and grabbed the camper door handle while standing on wet ground. The wet ground amplified the current.

This incredibly tragic accident made news stories, but it didn’t start much of a valuable discussion about preventing something like this from happening again. Since hot skin has the potential to be so dangerous, you must understand how to prevent it.

What is RV Hot Skin and how to avoid it Part 1

RV Electrical Safety Tips from an Electrical Engineer

Here, I’m sharing my best advice for preventing dangerous electrical situations while camping in an RV. Keep reading for RV electrical safety tips that will keep you and your family safe!

➡ Need a refresher on your RV electrical system? Read this: How Are RVs Wired? Helpful RV Electrical Basics for Beginners

120V AC RV Electrical Safety Tips

120V AC power is likely the type you’re most familiar with, even if you don’t know it by name. This is the power you draw from regular household outlets.

When you plug into shore power at a campground, you are sending a 120V AC current to the electrical outlets in your RV as well as to some of your RV appliances. This power carries more than enough to be deadly, so it’s critical to engage with it in the safest manner possible.

Invest in an Outlet Tester and Voltage Tester

Outlet and voltage testers detect the presence of electrical voltage. An outlet tester can help you determine if the power pedestal at a campground and the outlets inside your RV are working correctly. Always test the power pedestal for potential problems before hooking up your rig. If you find a problem, report it to the campground management immediately.

A voltage tester can detect electric current outside of an outlet. If you suspect hot skin, test the metal on your RV with a voltage tester before touching or entering your camper.

The test is simple, first set the meter to voltage mode. Then take one probe and touch it to a metal part of the RV, take the other probe and touch it to the ground. You should read nothing, if your reading anything above ambient (.1-.4V) then you may have hot skin.

Sperry Instruments STK001 Non-Contact Voltage...
  • VERIFIES VOLTAGE PRESENSE: Verifies the presence of AC Voltage...
  • DURABLE: Hi-Impact Resistant ABS housing with soft over-molded...
  • QUICKLY READ: Bright color-coded neon lights for easy visual...

Turn Breaker Off at Pedestal Before Plugging In

Before you plug in your RV at the pedestal, always make sure every breaker on the pedestal is in the off position. This will eliminate the danger of being shocked while you’re plugging in.

Only turn the breaker on once your plug is securely in the power pedestal. If you experience issues plugging in your power cord or the pedestal outlet is too loose, ask to move to another spot. 

Power Pedestal Breakers
Always turn off the pedestal breakers before connecting your RV to shore power.

Always Plug in Your RV With One Hand

Plug in your RV with one hand, and ensure that your other hand is not touching anything on the RV or pedestal. Make sure your free hand isn’t touching any metal at all. 

The reason for doing this is to limit points of contact in case of shock. If you use both hands, the current will flow through your body and pass through your heart. This is how shocks become deadly. Minimize potential shock flow by using one hand, and keep the other in your pocket if possible. 

Along the same lines only use one hand to turn on the breaker and look away from the pedestal while you do it. If something goes wrong there will likely be a bright flash that can burn your eyes.

Use a Surge Protector With Shutoff

A surge protector might seem expensive, but it’s an absolutely essential RV electrical safety accessory. Not only will a surge protector protect your RV electrical system from being fried by a faulty pedestal, but it can also save your life!

RV Electrical Safety Device: Surge Protector
Placing a surge protector in-line between the power pedestal and your RV’s power cord will protect your camper from a faulty pedestal.

Get a surge protector with an automatic shutoff feature. These devices automatically disconnect your RV from the pedestal the instant they detect power system or wiring issues. 

Sale
Hughes Autoformers PWD50-EPO-H, 50 Amp Spike Power...
  • 4,800 Joules of advanced surge protection
  • Smart Circuit Analyzer will shut down power to RV if a dangerous...
  • Plug-n-play – Only 4 second delay power on after plugging in...

Pro Tip: In addition to a surge protector, you should always travel with the 13 Most Important RV Safety Devices You Need For Your Camper.

Use Appropriately Rated RV Extension Cords

If you need to use an extension cord to hook up your camper, ensure that it is rated for RV use. This means the wire gauge is large enough to handle the current flowing through it. Using an RV extension cord will help prevent shock and fire. 

Keep Dogbone Adapters and Electrical Plugs Dry

Whether you’re using a dogbone adapter or your RV’s standard power cord plug, you need to keep them dry. These connections can be dangerous if they sit in a puddle of water or make contact with the ground. Water amplifies electrical current and can damage your RV equipment. 

Never Bond the Neutral Conductor to the Ground in the Coach

RV electrical systems should be wired with their ground and neutral buses unbonded from each other. This is an important safety measure, and it’s also an RV electrical code requirement by the NEC and RVIA.

Why Neutrals and Grounds are Separated in a Sub Panel
RV’s are always considered sub-panels on an electrical system. If you want to know the actual dangers and why we do not bond a ground in the RV this video gets into the details.

If the RV Frame Shocks You, Disconnect From Power Immediately 

This is an easy one. If you feel a shock or tingling in your fingertips from your RV frame or handle, disconnect from power immediately. That funny feeling is an electrical current flowing from your RV into your body and means there’s a wiring problem somewhere. 

12V DC RV Electrical Safety Tips

Your RV batteries supply 12V DC power. Although it’s not as dangerous as 120V AC power, this voltage can pose other dangers like electrical fires. Let’s look at RV electrical safety from the perspective of battery power.

Use Appropriately Sized Fuses

Be sure that you have appropriately sized fuses for all of your 12V DC electronics and appliances. Fuses that are too small will blow constantly. However, fuses that are too large can allow a problem current to pass through undetected. Don’t put a bigger fuse in to “fix” a fuse that keeps blowing. This is a risk for an electrical fire.

RV breakers and fuses
Don’t forget about your fuses! Make sure each one is the right size for its application.

Don’t Use Auto-Resetting DC Breakers 

If you use auto-resetting DC breakers, a breaker can trip and reset itself repeatedly without you ever knowing there’s danger or a problem. If you opt for reusable breakers, choose ones that require a manual reset. 

One time the RV next to us at a campground actually caught fire! We helped put it out and figure out what started it. Tom tracked it down to an autoreset breaker that kept resetting and heating up a wire that had been punctured by a screw. Eventually the wire caught fire.

This is also a good place to mention that you should never repeatedly reset a breaker without understanding the reason it keeps tripping in the first place. If a breaker trips more than once in a short timeframe, the safest thing to do is investigate why.

Don’t Overcharge Lead-Acid Batteries

Overcharging lead-acid batteries causes them to heat up rapidly. This is called thermal runaway. Thermal runaway can damage your batteries instantly. It can also pose other threats like releasing dangerous gases or starting an RV battery fire. 

Always use multi stage chargers that automatically stop charging when they are full.

Use a BMS for Lithium-Ion Batteries

BMS stands for a battery management system, and they’re a must for lithium RV batteries. A BMS manages your lithium batteries to measure temperature, voltage, and more. 

Battery management systems are critical to your lithium battery’s safe operation and performance. They prevent under and overcharging the battery to avoid battery fire and extend its lifespan. We recommend purchasing lithium batteries with reliable, built-in BMSs.

Battle Born Batteries
Battle Born Batteries, like the ones we used for our Ultimate Solar System and Rugged Overland Solar System, have built-in BMS.

➡ Lithium-ion versus lead-acid is one of the biggest debates in the RV electrical world. Check out our extensive battery testing to find out the real winner: Batteries Tested! What Is The Best RV Battery For The Money?

Use a Battery Disconnect Switch

A battery disconnect switch is a switch to the main power line from your RV battery bank. In an emergency, you can flip the battery disconnect switch and remove all 12V DC power from every appliance in your RV.

This switch also comes in handy when you need to replace your batteries, work on your electrical system, or store your RV.

Always install these switches on the negative lead of your batteries. This is because if you disconnect the positive and still have the negative connected to ground, there is a risk to short the batteries at their positive terminals to ground, a very dangerous situation.

battery disconnect switch
Always use a battery disconnect switch on the negative line

Be Careful Not to Short the Battery

Shorting a battery occurs when a wire or fixture from the battery’s positive terminal comes in contact with a wire or fixture from the negative terminal. This can create a huge spark, cause a fire, or even melt metal.

One time I accidentally shorted a battery to the ground of a car with a wrench. The wrench arced and welded itself in place until it got redhot and melted. The battery began to boil inside and released hydrogen gas. Luckily it did not explode but we have seen it happen

Always be mindful when working around your battery terminals.

exploded lead acid battery
This is a battery that actually exploded violently.

Alternative Power Sources: Generator and Solar Panel Tips

In addition to 120V power and your RV 12V DC system, there are a few other ways that your camper receives electricity. This section talks specifically about RV electrical safety as it relates to solar panels and generators

RV generator and power cords
Any device that supplies power to your RV can be an electrical hazard if not handled correctly.

Use Neutral Ground Bond Plug for Inverter Generators

A neutral ground bond plug works by grounding the generator to the frame of the generator itself. This eliminates stray voltage that can cause RV hot skin. 

Hughes Autoformers Ground Neutral Plug
  • Package dimension : 4.0 " x 6.0 " x 2.0 "
  • Product type : AUTO ACCESSORY
  • Package weight : 0.8 lbs

Use a Disconnect Switch for Solar Panels

Solar panels receive energy from the sun that flows into a charge controller before flowing into your batteries. In an emergency, you need a way to instantly shut off the flow of power from the solar panels.

The best way to do this is to use a disconnect switch on the positive wire of your solar panels. Like a battery disconnect switch, this switch allows you to instantly turn off the electricity flow. 

Ultimate RV Solar System Build Details - Turning an electrical Schematic into Reality (PART 2 )

Fuse Solar Panels 

You should fuse solar panels on the positive wire to prevent an overcurrent from flowing into your charge controller or batteries. Also, be sure every panel has an appropriately sized fuse. Fusing panels also prevent a short in a panel from allowing current to flow backward and burn the panel.

Use MC4 Connectors for Solar Panels

MC4 connectors are single-contact weatherproof electrical connectors for solar panels that require a tool to disconnect them. This ensures that your solar panel connections don’t come undone and cause a fire or hot skin on your RV. 

YXGOOD Solar Connectors MC4 Male/Female IP67...
  • 【MC4 Solar Connectors】Made of PPO + PA material,conductor pin...
  • 【Compatible Cable】Compatible with PV cables with different...
  • 【High Carrying Capacity】1000V DC rated voltage,30A rated...

Don’t Ignore RV Electrical Safety

RV electrical safety is a critical consideration when it comes to RVing and the RV lifestyle. Yes, RVing should be fun and relaxing. But it’s not very fun when your RV shocks or electrocutes you.

Consider these safety tips to keep yourself and your RV’s sensitive electrical systems protected from stray currents.

RV Electical Safety Device: RV Extension Cord
You should approach your RV electrical system with the same care and caution as a residential system.

Have you ever encountered RV hot skin or other electrical hazards while camping? Let us know in the comments.


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Janet s lee

Saturday 23rd of April 2022

Electrical help PLEASE

We have a 2015 keystone springdale 310dh. When the generator (which we dont have) and conv circuit is on the camper is energized. It shocks us. When those two circuits are turned off the camper doesnt shock but the fridge wont work, the electic hot water, the tv receptacle, the receptacles in the bedroom all wont work. It has fried a tv and 2 dish boxes. When you have all the circuits on and turn the air conditioner on it energizes the camper more. We unplugged the refrigerator from the camper and plugged it directly into the power supply to the campsite and it still energizes the camper even with the 2 circuits that were energizing before are turned off. A friend of ours is thinking our inverter is bad..... please please help us!!!

Mortons on the Move

Saturday 23rd of April 2022

There are lots of places you could have a short to the RV frame that is causing this. It's impossible to diagnose without putting a meter on the circuits. An electrician or competent RV tech should be able to pinpoint the issue pretty quickly. As for the inverter its possible, they should bond the neutral and ground when unplugged and may cause the issue if there is a short internal. From your description, there are lots of places it could be, however.

Bill Morgan

Thursday 23rd of December 2021

The article fails to mention the two conditions which in combination cause Stray Voltage or "Hot Skin." Stray Voltage comes from current leakage inside the RV. This could be a damaged wire or a bad heating element in a water heater or from some other appliance. Normally any Stray Voltage is drained from the RV by the Equipment Ground Conductor (EGC) back to the Main Entrance Panel where the Ground and Neutral conductors are bonded and connected to the transformer and to a Grounding Rod. If there is Stray Voltage AND a problem with the EGC, then there is potential for injury or even death. So if you get a tingle or a shock from your RV, you need to: A. Disconnect power B. Correct the bad Grounding conductor issue C. Fix the source of current leakage

Kim Richards

Saturday 11th of December 2021

Good article. What does make me a little nuts, is that at sometime in the distant past, it was decided to color code the DC wiring in RVs the same as AC wiring; so, the positive DC wire is black (hot) instead of red, and the negative wire is white (neutral) instead of black.

Chester Milton

Saturday 11th of December 2021

Excellent article!

Mortons on the Move

Sunday 12th of December 2021

Thank you!

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