Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse

Pretty easy. The packaging shows you what to do with the GND wire (nothing), which I was concerned about immediately. It comes with a longer screw that you can use after removing the screw from your outlet to secure it in place, just in case it gets bumped and wanted to fall out. It is pretty heavy and a little awkward, so I was happy for the extra screw to make sure it would stay put. I'm not an HVAC professional, so I'll just outline my experience. I installed an ecobee4. From my original thermostat, I had a Rc, Y1, W1 and G wire. I had an extra blue wire running to nothing, but using a $20 multimeter I bought, I found it was only running 8-10 VAC. I first turned off the whole system. I live in an apartment complex so, being unfamiliar with HVAC, I A) didn't know exactly where to look to see if I could use that blue wire at the furnace for a C wire and B) didn't want to be seen outside jacking with the complex, and my neighbor's possibly, HVAC stuff. Anyway, I turned everything off. I checked the wires with the multimeter. Initially I'd installed a Nest because I didn't have a C wire and when I turned everything off, the Nest did not say that it needed to be connected to power, so I was worried. I worked for a little longer removing wires VERY carefully and finally realized that I had that mulitmeter and checked the voltage on the wires to find there was nothing running to them. That made everything much more relaxed. I removed all the Nest stuff, then ran the transformer cable up which I just used some extra wire I had. It was nothing special. It had a accessory plug on the end. I have no idea what it was originally for, but I just clipped it off and stripped the wires to where I needed. I attached it to the AC terminals on the plug and, just to test without installing anything or doing anything at all really, plugged the wires into the C and Rh terminals. I got no response. So, hoping that I didn't just fry the thing (which you can't if you're using the correct voltage right? I don't know), I moved the Rh wire to the Rc terminal. It powered on and went through it's thing. I took everything out and put it up on the wall with the cables in place. I attached the easy cables (Y1, W1, G and C). The problem with Rc became that the hole for the wire was really small to only allow for the one wire. The cable from the transformer is threaded. I couldn't get them both to go in. So, I ended up stripping the original Rc, which was a solid wire, and wrapping the threaded wire around the base. Pushed the Rc lead in and made sure the surrounding wires are in tight enough that nothing is exposed to touch the part of the Rc assembly that needed to be left bare to connect the transformer wire. Turned the power on and plugged the transformer in and it power up just as before. It has rebooted once, but I was messing with Homekit, and I think it actually just crashed. It's been fine for the past 5 hours. I looked around for step by step for my wiring, and hope this helps anyone in a similar situation. tl;dr: It works well for the ecobee4. Test it with just the transformer first on Rc or Rh and C to make sure it gets powered on. You'll not break your furnace transformer that way. You might have a hard time with the wires into the ecobee backplate being too much to fit into the receptacle. You can wrap one wire around the other and put the unwrapped one into the backplate. Be sure that it (joined Rc/Rh) won't touch the other wires. Otherwise, it's been great. Oh! I was also super worried about having the external transformer wire connected to the same wire that was initially providing power to the system (as stated, the wire from the transformer is wrapped around the original Rc wire), but I checked it with the multimeter afterward and it still ran the same 26 -29 VAC.

I'm using an ecobee3 lite with a pellet stove, which means having to power the smart thermostat from a transformer. This is working perfectly for that purpose. I first tried a Wuyelin transformer but did not like how warm it got. The Elk is easily 50% cooler if not more.

Item being reviews: Elk TRG2440 24VAC, 40 VA AC Transformer with PTC Fuse I installed this 3 months ago to use with Ring Video Doorbell 2. It is doing the trick perfectly. In the posted picture you can see the Elk device and a resistor that I attached to the side to comply with Ring requirements. The Ring Video Doorbell 2 says that the battery can last about 3-12 months depending on how much motion is involved and how far you set the motion sensor to detect. It says if motion is high than it will last less than 3 months. Sure enough, my battery was fully charged when installed, then died within 2 weeks of my high motion location uploading a video every minute to the Ring cloud. So I bought this Elk 24v transformer. The ring documentation says that you must purchase a 25 ohm resistor. So I bought the following resistor to work with this Elk device: Uxcell a12050500ux0030 Aluminum Case 50W 25 Ohm Chassis Mounted Wirewound Resistor After 3 months of sending 1000's of video recordings to the Ring cloud I am happy to report that this device is keeping the battery at 99% and the Ring device has not reported any failure from the Power Source, it has report of Power Status of "Very Good" which means it is fully charged and the correct voltage.

I purchased one of these a few years ago and thought it was junk, but in reality it was my error so I am here to write a current review because I purchased another one. I originally purchased this item to power the switch machines on my model train layout and it has performed admirably. I was having lots of problems with the lighting transformers that I had purchased since the very beginning of my layout so I decided to try one of these. It has worked fine running the lights on my layout until last night when it started to smoke on me. I am uncertain if I have too many led's hooked up to it, or if I maybe wired something wrong, but it caused me to shut the lights off in my basement and walk away from the train layout in frustration. I have about 50 lights on my layout and all but 2 are led, the other two are bulbs. I do believe that this transformer can handle the load and maybe I cross wired something incorrectly because it didn't smoke while I had all the lights on before. Recently I started adding another shelf on my layout (underneath) and decided I need to go under the layout and rewire everything to a pcb board so that I wont have to crawl under the layout anymore. I have wired 24 lights to the pcb board and the rest are still connected to bus wires around the layout. I have decided to keep wiring and maybe split the wires between 2 of these transformers.

Finalmente encontré el producto justo para alimentar un timbre con cámara Ring 1 después de haber intentado hacerlo con otro tipo de transformador para eliminar el uso con batería y tener que cargarla con cierta frecuencia

All ok.

I used this to replace an old blown standard transformer to power my nest doorbell. It works exactly as it should. I had a short in the wire i couldn't find that blew my old transformer and this handled the overload perfectly. It helped me trouble shoot the issue. unplug after the short, plug it back in, powers back. pick it up if you are looking to run a smart doorbell.

This met my expectations for use to provide a c-wire connect for ecobee3 thermostat power and had no issues with this product for the applied function for thermostat power i do recommend this product

Bought this item for my RingPro doorbell - super easy to install and RingPro has been working awesome without issues since I installed this transformer..