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Power Spy™ #30 30A 120v power monitor - NEMA TT-30 to single TT-30 outlet with kWh meter

  • 22509

Click here for an easier way to order your Power Spy™ at my Customize your own page; 30amp Power Spy Customize your own

The Power Spy™ #30 is equipped with a NEMA TT-30 (Travel Trailer 30amp 120v) plug and a single NEMA TT-30 Outlet in a strong Polycarbonate enclosure. This is the same case used in the original Dryer Buddy. It allows you to monitor the wattage, voltage and amperage flowing through to your RV Trailer, or any other device equipped with a NEMA TT-30 plug. It also accumulates kilowatt-hours (kWh's), by multiplying this number by your electric rate you can see how many dollars and cents it cost to run your Travel Trailer or run the appliance you have plugged into it. The Power Spy is not just a Travel Trailer and Electric Vehicle accessory but can be used to monitor how much energy your Bitcoin miners, lights or any other 120-volt devices are using. Available in several cord length's. Like our RV Buddy this unit needs to be sheltered from the weather as it isn't waterproof. The longer cable versions allow the outlet box to be placed under your RV away from the weather or in one of the storage compartments.

By default the unit has a single outlet on the right side of the case, we offer an option for a second outlet if desired on the left side of the case. You may also request specific positions for the outlet in the notes, for example; two on right side, two on the left side, one or two on the face like a Dryer Buddy ect.

Great for RV park or home use to keep track of an individual RV Trailer' use when sharing a power bill.

The appearance of this plug is sometimes confused with a NEMA 10-30 connector, rated for 240 V, but the NEMA TT-30 is a 120 V device. The hot and neutral blades are angled at 45° from vertical and 90° to each other, similar to NEMA 10 devices, but the plug is slightly smaller than a NEMA 10-30 and larger than ordinary 5-15P plugs. The ground pin is round, unlike NEMA 10-30's "L" shaped neutral blade.

Need some help identifying your wall outlet? We can help! Below is a description of the more common NEMA outlets and their numbers as well as some handy NEMA plug charts. You can also email us a pic of your plugs and outlets you need help identifying and we would be happy to help.

Here are the more common NEMA outlets:

  • 5-15 standard 15A 120 volt household outlet, the most common you see everywhere.
  • 5-20 standard 20A 120 volt household outlet, required by code in bathroom and behind your refrigerator.
  • 6-15 standard 15A 240 volt household outlet, found in homes and motels for running in-wall Air Conditioners, it’s the smaller brother to the NEMA 6-20 outlet. The 5-20 is not as common as a 6-20 outlet with it’s “T” shaped slot as it will accept both 6-20 and 6-15 plugs.
  • 6-20 standard 20A 240 volt household outlet, found in homes and motels for running in-wall Air Conditioners, also found occasionally in residential garages.
  • 6-50 standard 50A 240 volt 3-prong outlet, found in shops and garages used for large welders.
  • 10-30 standard 30A 240 volt 3-prong Dryer outlet found in homes build before 1996
  • 14-30 standard 30A 240 volt 4-prong Dryer outlet found in homes build in 1996 and newer
  • 14-50 standard 50A 240 volt 4-prong Range (electric stove top) outlet, also called RV-50 at the RV parks. By far the best universal connector to have for an EVSE. This is the one the Tesla guys install in their garages.
  • TT-30 (Travel Trailer 30amp) 30A 120 volt 3-prong outlet, the older style found in RV parks, not used in residential homes.
  • L6-30 (locking 240 volt 30amp) Twist-Lock 30A 240 volt outlet, my personal favorite locking connector, easy to find in stores, works great for adding adapters to portables EVSE’s equipped with a L6-30 plug.

220/240 volt outlets are commonly install with the ground pin towards the ceiling for safety. 110/120 volt outlets can be found mounted in all directions. Be sure to carefully look at your outlet and the chart, it's easy to mistake one outlet for another if your outlet has it's ground pin facing the floor instead of the ceiling or Vice Versa compared to the chart.

In the full NEMA number you will see a capital R or P. The R stands for Receptacle (outlet) and the P stands for Plug, we commonly truncate this to just the numbers and add the word receptacle (or outlet) at the end. For example 14-50R becomes 14-50 receptacle or 14-50 outlet.

Need some extra length between your Dryer outlet and Dryer Buddy™ or between the Dryer Buddy™ and your Electric Vehicle Charging Station (EVSE)? I custom build extension cords to the length your need and with the plug and outlet of your choice, see my extensions in the Adapter’s section for several models; Extension Cords

Give you new Buddy unit a techie look with Beautiful Black Socket Head Screws with matching black washers; Black Socket Head Screw and washer Upgrade Pak for all Buddy units


Email me with your custom request.

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