YOJOCK Socket Tester RCD Plug Outlet Tester with LCD Display (Electrical Receptacle Detector)
Product description
If you’ve ever had to work out whether a wall socket is wired correctly, this YOJOCK socket tester is the kind of “quick sanity check” tool that can save you time and hassle. It’s plug-and-play by design, and the key point is that it uses an LCD display plus colour cues so you don’t need to interpret a maze of LEDs like on older testers.
That said, it’s worth treating it as a practical checker rather than a full electrician’s diagnostic kit. Depending on what you’re trying to confirm, you may still need proper inspection—especially around installation safety and any RCD-related behaviour.
The essentials (what it’s for)
This outlet tester is designed to detect electrical wiring and voltage/polarity status at a mains receptacle. You plug it into the socket, and the tester indicates what’s going on straight away: it highlights whether the socket is wired properly (green) or flags wiring problems (orange).
It also includes an RCD test button, intended to check whether the RCD trip breaker is functioning. In other words, it’s aimed at people who need fast feedback before using an outlet, a power strip, or carrying out basic electrical maintenance checks.
For everyday use, the most useful part is how quickly you can go from “not sure” to a clear on-screen indication. In a maintenance setting, that can be the difference between spending an hour tracing wires and isolating a likely wiring fault.
Key features that matter in practice
The tester is set up to be easy even for non-specialists. The LCD display is there to make results more readable “at a glance”, while the colour system (green for good, orange for issues) gives you an immediate direction.
When wiring issues are detected, it can indicate multiple potential wiring errors. The tester references six possible wiring situations, including conditions like correct wiring, open ground, open neutral, and reverse combinations (live/earth or live/neutral) where applicable.
There’s also a simple reference chart built into the unit’s instructions, so you can match the indicator lights to the wiring condition. That’s particularly helpful if you’re not doing this every day and don’t want to rely on memory.
A practical micro-scenario: say you’re checking a spare office socket before connecting equipment. You plug in the tester. If the display stays in the “good” range, you move on with confidence, if it shows an orange wiring warning, you stop and arrange proper fixes rather than guessing.
RCD test button: helpful, but use it thoughtfully
The “one-click RCD test” is a strong feature on paper because it’s designed to confirm the trip breaker’s leakage protection function. If pressing the RCD button causes the socket to trip, the tester indicates the protection function is working.
However, there’s an important caveat included with the tool: it advises being careful using this function on normal receptacles, as it may cause the house wiring system to trip. That’s the kind of limitation you should take seriously if you’re testing in a live environment or with a shared supply.
So while the RCD test adds value, it’s not something you should treat as “automatic and risk-free” in every setting.
Tech specs
- Type: Socket outlet tester / electrical receptacle detector with LCD display and indicator lights
- Display: LCD display
- Operating range: 90–250V power socket
- Safety rating: CAT II 300V
- Compliance/marking: CE-Marking
- Power/socket connection: Plug and play (plug into the outlet)
- Warranty: 1 year
Pros
- Colour-coded results (green/orange) make it easier to interpret quickly
- LCD display aims to show the wiring status clearly at a glance
- Checks multiple wiring fault scenarios, including open neutral/earth and reverse wiring cases
- Includes an RCD test button for breaker/leakage protection checks
- Designed to be understandable for non-specialists, not just trained electricians
- CAT II 300V and CE-Marking are included in the stated safety info
It may not suit you if...
It might not be the best match if you need a deep, installer-level diagnosis beyond basic wiring and the RCD trip indication. Also, if you’re planning to rely heavily on the RCD function across normal household sockets without isolating anything first, the included warning about possible tripping should make you think twice.
It’s more in the “everyday testing and fault finding starter tool” category than a replacement for full inspection.
¿Merece la pena? When to buy (and when to pass)
Worth considering if you do frequent checks around sockets—like office maintenance, workshops, labs, factories, or simply wanting a tool for home troubleshooting when something feels off. The value here is speed and clarity: you get an immediate wiring status indicator and can avoid guesswork.
It’s less compelling if you only rarely check sockets and would be happier investing in a more comprehensive testing approach later, or if your priority is advanced troubleshooting rather than quick plug-in checks.
A good rule of thumb: buy it when you want a fast first-pass detector, think twice when you need definitive installation certification or deep fault tracing.
Quick FAQ
How does the tester show results?
It uses an LCD display plus colour indication: green indicates wired properly, while orange signals wiring problems.
What does the RCD test button do?
It’s intended to check whether the RCD trip breaker is functioning. The tester indicates the protection function is working if the socket trips.
Is it safe to use the RCD function on any socket?
The instructions advise care with normal receptacles because using the RCD function may cause the house wiring system to trip.
What wiring faults can it indicate?
It references six potential wiring errors, including correct wiring, open ground, open neutral, and live/earth or live/neutral reverse cases.
Does it come with instructions that explain what the lights mean?
Yes, it includes an easy-to-understand chart/instructions to determine wiring conditions based on the LED light results.