TT Electrical

The reference for all things RV Electric is

Last update 2005 but still a lot of good info. Recommended and linked from as of 2018.

How to Wire an RV Receptacle

Voltage drop for AC whats acceptable?

You can poke the VoltAlert into the tall neutral slot (no blink or beep), then the ground hole (no blink or beep) and finally the shorter hot slot (should blink and beep). It won’t tell you the exact voltage of the outlet like a voltmeter, but it will confirm if the polarity is correct and tell you if the ground connection has been floated and electrified by another RV with a short in its own wiring.

Volts, Amps, & Watts

From where there is a lot more and worth looking at again. Good info on solar panels.

Watts are a measure of electrical power. Amps (or amperes) are a measure of electrical current or flow rate/volume. Volts are a measure of force or pressure through an electrical circuit.

Let’s go back to our water pipe analogy. As I said before, Volts are like water pressure. Amps are like the water flow rate. Watts are then like the total water output produced by the combination of water pressure and flow.

Now for the math I promised earlier.

Watts = Volts X Amps

So, electrical power is determined by the amount of electrical current (amps) and the amount of force (volts) used to push that current. The higher the force (volts) or the higher the current (amps), the more power (watts) there is in an electrical circuit.

Doing a little algebra, we get this equation:

Amps = Watts / Volts

Why do we care?

We care because we have to determine how much electricity we need to run the goodies in our RV. These math problems help in figuring out what our batteries can do, what appliances we can run at the same time in various situations, and what future upgrades to the electrical system we might want to undertake.

We usually need to know amps since most of our RV electrical knowledge is based on amps. We plug into 20-amp, 30-amp, and 50-amp electricity sources.

We always know volts. It’s either 120 or 12 for RVs depending on whether we are talking AC (120-volt) or DC (12-volt).

And wattage is usually available. It’s located on the appliance nameplates or in the owner’s manuals. Or, wattage can be estimated by using the many online wattage tables for common RV appliances. Of course, if you use online tables, remember they are just estimates as your actual appliances may vary.

Testing The Rv Park Power box, Without Being An Electrician


Testing The Rv Park Power box, Without Being An Electrician

Surge Guard 34750 by TRC with lockbox. Monitors dropped phases et al — Camco