A 20-amp remote control outlet is a receptacle rated for up to 20 amps that switches its load on and off from a remote input, while the feed stays live.
The rating on the box tells you what the wiring can handle; it says nothing about how the thing turns on. That gap trips up a lot of shoppers, and it’s why two products that both say “20-amp remote control outlet” can behave nothing alike once they’re installed. Some are plug-in smart outlets you pair with a phone. Others are hardwired power units that want a 20A circuit, a licensed electrician, and a control cable run to a switch or a low-voltage signal.
Ametek ESP’s SX-1120-RT is the second kind. Its installation instructions, which cover the SX-1115-RT and SX-1120-RT, spell out the requirements plainly: a 120V, 20A receptacle, and a total load that must not exceed 20A.
How Does a Remote Control Outlet Actually Switch Power?
An internal relay or switching circuit opens and closes the load circuit when it gets a signal, while the outlet itself stays connected to mains power the whole time. Nothing gets unplugged and nothing loses its feed — the circuit is simply broken and remade downstream.
What counts as a “signal” is where designs diverge. In the Ametek ESP units, the remote control input accepts either a contact closure or an applied DC voltage, and the terminal block pin assignments are listed in the installation instructions. That’s industrial-style control wiring, not a phone app.
A few more details from the same manual worth knowing before you buy anything:
- The SX-1115-RT and SX-1120-RT switched outlets provide power only when the front-panel switch is on and the remote control input is activated. Two conditions, not one.
- The unit carries 9 receptacles total — six switched, two always on, and one front-panel courtesy outlet.
- These units use physical control wiring rather than consumer smart-home app control.
What Do You Need Before Installing One?
The wall receptacle feeding the unit has to be rated appropriately for the load. Ametek ESP’s instructions specify a 120V, 20A receptacle for the SX-1120-RT and state that a licensed electrical contractor is needed if one isn’t already available.
That last clause matters. A 20-amp rating doesn’t mean every connected device can pull 20 amps continuously. The connected device and the combined load on the outlet must stay within the product’s stated limit. For the SX-1120-RT, that ceiling is the full 20A — not a margin to fill, a line not to cross.
How Do 20-Amp Remote Control Outlets Differ From Smart Plugs?
They differ in almost every way that affects installation. A plug-in smart outlet generally runs on a standard 15A household circuit, pairs with an app, and asks nothing more than a free socket. A hardwired 20A unit like the SX-1120-RT wants a dedicated 20A circuit, accepts contact-closure or DC control signals, and may require an electrician before it can be wired at all.
| Feature | Plug-In Smart Outlet | 20A Hardwired Remote Unit |
|---|---|---|
| Circuit requirement | Standard 15A household circuit | 120V, 20A receptacle |
| Control method | App or smart-home hub | Contact closure or applied DC voltage |
| Load ceiling | Usually well under 15A | 20A total, stated in the manual |
| Installation | Plug in and pair | May need a licensed electrician |
| Receptacle count | Typically one or two | 9 total: 6 switched, 2 always on, 1 courtesy |
| App control | Yes | No |
| Activation logic | App command only | Front-panel switch on plus remote input active |
If you’re comparing models and want to see which ones handle 20 amps safely in real setups, our roundup of the best 20 amp remote control outlets breaks down what each one is actually built for.
The Ametek ESP approach is documented in full in its SX-1115-RT and SX-1120-RT installation instructions, which cover the wiring, load limits, and terminal assignments.
What Should You Check Before Buying?
Confirm three things in order: what circuit feeds the spot where it will live, how the unit expects to receive its control signal, and what the total connected load will be. Get those three answers and you’ll know whether you’re buying a plug-and-play smart outlet or a job that starts with a call to an electrician.
One caution that saves money: don’t assume any product labeled a remote control outlet is a smart plug. The category spans plug-in smart outlets, hardwired receptacles, and power strips with remote switching, and the differences show up in the wiring, not the packaging.
FAQs
Can a 20-amp remote control outlet run on a 15-amp circuit?
Not safely at full rating. The Ametek ESP SX-1120-RT requires a 120V, 20A receptacle, and its instructions state a licensed electrical contractor is needed if one isn’t available. Running a 20A-rated device on a 15A circuit leaves no margin and risks tripping the breaker under load.
Do these outlets work with Alexa or Google Home?
Not the hardwired industrial units. Ametek’s SX-1115-RT and SX-1120-RT use physical control wiring — contact closure or applied DC voltage — rather than consumer smart-home app control. Plug-in smart outlets in the same product category typically do support voice assistants.
What does “total load must not exceed 20A” actually mean?
It means the combined draw of everything plugged into the unit cannot pass 20 amps. The 20A figure is the ceiling, not a target. Add up the wattage of each connected device, convert to amps at 120V, and keep the total below the limit stated in the manual.
References & Sources
- Ametek ESP. “SX-1115-RT / SX-1120-RT Installation Instructions.” Source for the 120V/20A receptacle requirement, load ceiling, receptacle layout, and control wiring method.
