Klein Tools RT390 Circuit Analyzer with Large LCD, Identifies Wiring Faults, GFCI and AFCI Tester, Voltage Drop, Displays Trip Time, Orange

One has the option of a number of GFCI testers of which the Klein RT 310 and 350, the Fluke Pro 120+ are generally the best. But there's a new king in town. The RT390 is expensive and bulky, but it absolutely demands to be in the kit of any home inspector, safety inspector, electrician, or any homeowner who plans to do more than incidental work on their electrical systems. First, the arrival of AFCI's and especially hybrid AFCI/GFCI's has changed the outlet tester game. These breakers, Arc Fault Circuit Interruptors, detect arcs in the wiring and are most effective in identifying and protecting against electrical fires (GFCI's protect more directly against shocks emanating from the outlet and attached products). Most outlet testers don't test AFCI's. The Klein RT250 is a basic GFCI tester. Bump up to a RT310 and you get AFCI testing as well, but there's no diagnostic capability in the 310 -- it's a simple go/no-go tester that can't tell you anything about what's wrong. The RT350 does a bit more, but doesn't generate enough data for you to figure out what's wrong or how to fix it. I wouldn't generally recommend the 350 now that the 390 is available. The RT390 offers a number of significant advantages: First, it tests any outlet for both arc and ground fault integrity. Second, it tests at multiple trip levels so you can predict whether you just have a tired or non-exercised interruptor. Testing it side by side with a 350, the 390 was notably more consistent and accurate than the 350, in particular with regards to false negatives (the 390 identified arc faults in four times more installations than the 350. And lastly, the 390 is much more rugged in the case design, the cable connector, and the sturdiness of the internal circuit boards and components. What is missing in the 390? I'd love to see a set of clip leads so I could test an outlet box at the bare wires before installing the receptacle, And at nearly $200 a hard foam case would be appreciated. However, these are nits. This can be the most significant risk-prevention tool in your toolbox and should replace non-contact sniffers and the cheaper GFCI testers that we all carry around and rely on. Five stars from me.

Lo único vamos del producto es que las baterías se dañan muy rápido, hablo que una semana después de ponerlas se vaciaron :( así que recomiendo quitarlas cada que no lo usen o ponerle desde el principio unas de buena calidad

Works well. Expensive for what it does. If I ever need to replace it.... I would look for a cheaper option.

Love the fact it does voltage drop test

Why spend the extra money for this particular circuit tester? Because it works! The display tells you the voltage at the receptacle. You can also test two different levels of GFCI protection as well as arc fault protection. There is also a simulated load test which tells you what the voltage drop is based on 12amps, 15amps, and 20amps. Anything under 6% will be flagged in red. The fact that it has a replaceable cord makes it easier to use in some instances. It’s a standard 130v 15amp computer cord so a longer cord could be used with it. This circuit tester has saved me time when diagnosing problems especially relating to voltage drop.