RT110 Outlet Tester, AC Electrical Receptacle Tester for North American Outlets

I’ve always liked this brand and have bought several of their products through Amazon. I use this outlet tester constantly as a quick visual check to confirm our ESD protective mats are properly grounded for sensitive circuit‑chip work. Electricians have told me that older versions of testers like this used to overheat or fail internally, and I remember experiencing that years ago too — but times have definitely changed. This model has been excellent. I’m approaching 5+ years with it, and it’s still working reliably.

I had bought something that I read some reviews that they were not properly grounded; so I wanted to test the grounds myself…this showed me that the grounds were correct putting my mind at ease! Simple and easy! Works perfectly!

Works perfectly, live in an older house, was not sure if the groud was good or not, tested correctly.

Works good. Easy to understand

This tool plugs into a three pronged outlet to check if it is wired correctly. If it is not it will tell you what is wrong so it can be fixed. If it is correct it will tell you that also. It has lights that go on that tell you what is wrong and a light key that gives you details printed on the plug itself.

I will try to be as honest as possible because I depend on other people's reviews and feel I want to help the best I can: After complaining for years I wish I had some way of testing a receptacle quickly whenever an electronic item was not working so I could tell if it was the power or the electronic item. In the past I ran around the house for 20 minutes looking for something I could unplug and test a different receptacle. Found these on Amazon by accident and sure glad I did. This simple product not only tells me if the power is coming in, but can diagnosis what the exact problem is if the power is not fully working as it should. For the price I think every home should have one. Good luck.

turn off main breaker when working in the breaker box. tests basic functionality at a 120 volt AC outlet . 110 to 125 volt , 50 hz , 60 hz the quality at the outlet may not be fully know . a DVM digital volt meter will be needed to measure for any possible voltage on Ground . i fixed the issue before i received this tester . last year i had 2.5 volts on ground. recently i was measuring 6 volts on ground . Earth ground Rod to ground bus bar , 6 volts Earth ground Rod to neutral wire , 0 volts neutral bus bar to ground bus bar , 6 volts . breaker box , looked like it had been wired correctly . then i heard about the Green Bonding Screw . the Green Bonding Screw is a single point tie point that connects ties ground bus bar and neutral bus bar . the Green Bonding Screw is found on the neutral bus bar in the breaker box . tightened the Green Bonding Screw a couple of thread pitches . 0 volts , perfect . the contracter installers did NOT check verify their work . Ground bus bar was tied to breaker panel Neutral bus bar was tied to Earth ground Rod. however , the ground bus bar was NOT touching the neutral bus bar . By intention , the Neutral bus bar does NOT touch the breaker panel . instead , the Green Bonding Screw is ALL important to provide the single point contact ( helps to prevent ground loops to ) i got this outlet tester for trivial use when something doesn't check good , you will need a DVM digital volt meter to do some actual troubleshooting . breaker box needs to work first : 3 measurements: earth ground rod to neutral bus bar , 0 volts earth ground rod to ground bus bar , 0 volts neutral bus bar to ground bus bar , 0 volts each outlet has 3 measurements : hot to neutral , 120 volts ( same )* hot to Gnd , 120 volts ( same )* neutral to Gnd , 0 volts .

I purchased this for 2 reasons: 1) I'm writing a new mapping for my electrical panel, because what's written on the panel door isn't very accurate. So I'm turning off breakers & testing every outlet to see what's connected. To be honest, I've plugged in a radio before to test whether or not there's any juice and that worked equally well 2) This is where this tool is REALLY helpful. I replaced all of my outlets about 20 years ago, & frankly have never been really sure that I didn't have the wires swapped on some of them (considering that I installed a dimmer switch upside down around that same time is proof that I have cause for concern). Anyway, the light combos on the tool will alert me to exactly what I was checking. The peace of mind was worth every penny.

Does what it says. Simple, efficient

Works. Easy to use. No issues.

Muy buen producto, me ha ayudado mucho a instalaciones eléctricas para hacer comprobaciones rápidas. Lo recomiendo mucho sin problemas, posiblemente lo único malo es que las instrucciones no están en español solo ingles, no tengo problemas para leerlo pero seria bueno tenerlo en español de igual manera.

Outil parfait pour vérifier que vos prises électriques sont correctement connectées.

Sin duda el mejor comprobador de contactos de pared viene un instructivo en español su calidad certificada lo hace el número 1 lo recomiendo totalmente viene su cajita para guardarlo solo recórtalo de las orillas al abrirlo por primera vez lo más importante no usa pilas ni nada de para recargar los leds de los indicadores, sin duda la mejor compra.