• Outlet tester, US plug, with its light chart and GFCI test button
  • Outlet tester, EU Schuko plug, with its light chart
  • Outlet tester, UK 3-pin plug, front and back
  • Outlet tester, AU plug, front and back
  • Outlet tester and the four plug types: EU, US, AU and UK
  • Outlet tester plugged into a wall outlet, two green lights on
  • Pressing the test button on the outlet tester
  • What's in the box: outlet tester, retail box and user manual

TGP - Outlet Tester — Check Your Ground Port Before You Ground

TGP - Outlet Tester — Check Your Ground Port Before You Ground

Plug it in. Read 3 lights. Know if the ground behind your outlet is real.

$20
$20
Save 0% Sold out
Plug: US Plug

Buying a Grounding Sheet? This tester goes into your cart free with every order.

  • NO BATTERIES
  • 7 WIRING CHECKS
  • US / EU / UK / AU PLUGS

Shipping

Processing takes 1 to 3 business days. Delivery is 7 to 10 business days in the United States, and 7 to 14 internationally.

You get a tracking number by email the moment it leaves. Full detail is on our Shipping and Delivery page.

Returns

Write to Support@thegroundport.com first. A person replies within 1 business day, with a name at the bottom.

If the tester came free with your Grounding Sheet, it's yours to keep, refund or not. Read the full refund policy.

Your grounding sheet plugs into the ground port, the round hole at the bottom of the outlet. This tester tells you in seconds whether that ground is actually connected.

  • Shows whether the outlet's ground is connected: Correct or Open ground
  • Checks 7 common wiring conditions with 3 lights
  • Built-in test button: GFCI on the US version, RCD on the EU, UK and AU versions
  • The fault chart is printed on the tester, so you don't need the manual to read it
  • No batteries. It runs off the outlet you plug it into

What's in the box

  • 1 × outlet tester (BSIDE AST01), in the plug type you choose
  • 1 × user manual
View full details

Why test your outlet first?

Your grounding sheet or mat plugs into the ground port, the round hole at the bottom of a wall outlet. If the ground behind that hole is open, the sheet has nothing to connect to, and you can't tell by looking at it.

Older homes, DIY repairs and loose connections all leave outlets like that. Plug the tester in before you set up, and in a few seconds you know which kind you have.

What it checks

  • Ground check

    Correct or Open ground, at a glance. It's the first thing to know before you plug in a grounding product.

  • 7 wiring conditions

    3 lights show correct wiring, open ground, open neutral, reversed wiring and more.

  • GFCI / RCD test button

    Press it to check that your outlet's safety device trips. GFCI on the US version, RCD on the EU, UK and AU versions.

  • Chart on the tester

    The light chart is printed on the front, so you read the result without the manual.

  • No batteries

    It runs off the outlet you plug it into. Nothing to charge, nothing to replace.

  • Pocket size

    2.0 × 2.0 × 2.2 in and 1.8 oz, in an impact-resistant ABS housing.

How to use

  • 1

    Plug the tester into the outlet you plan to use for your grounding product.

  • 2

    Turn your view so the chart on the tester reads upright, then read the 3 lights left to right.

  • 3

    Match them to the chart. Use your grounding product only on an outlet that shows Correct.

  • 4

    Optional: press the test button to check that your GFCI or RCD trips. How, below.

Optional: the test button

If a GFCI- or RCD-protected outlet doesn't trip, contact a licensed electrician. The plug-in test needs a connected ground, so on an outlet without one, use the TEST button on the GFCI outlet itself.

What the three lights mean

LightsReadingWhat it meansGrounding product?
CorrectOutlet is wired correctlyOK
Open groundGround wire is missing or disconnectedDon't use
Open neutralNeutral wire is not connectedDon't use
Hot/neutral reversedHot and neutral wires are swappedDon't use
Hot/ground reversedHot and ground wires are swappedDon't use
Open hotNo power, or the hot wire isn't connectedDon't use
Hot/ground reversed, missing groundHot and ground are swapped, and the ground is missingDon't use

Light 1 is red, lights 2 and 3 are green. If the chart on your tester looks upside down, the outlet is installed ground pin up. Turn your view so the chart reads upright, then read left to right.

Specifications

ModelAST01 (BSIDE)
Indicators3 LEDs: 1 red, 2 green
Wiring checks7 conditions
HousingImpact-resistant ABS
BatteryNone. Powered by the outlet
MarkingsCE, RoHS (per manufacturer)

What's in the box

  • 1 × outlet tester (BSIDE AST01), plug type as selected
  • 1 × user manual
  • Retail box

Important safety information

  • This tester is a quick screening tool. It checks 7 common wiring conditions and doesn't detect every fault. A weak ground or a bootleg ground can still show Correct.
  • It doesn't replace an inspection by a licensed electrician.
  • It needs a 3-prong outlet. A 2-prong outlet has no ground port to test.
  • Pressing the test button cuts power to everything on that circuit. Save your work and unplug sensitive devices first.
  • If the tester shows any fault, don't use a grounding product on that outlet. Contact a licensed electrician.
  • Don't use it on damaged outlets, in wet locations or with wet hands. Use only the plug type and voltage marked on your tester.

FAQ

Questions

Is it free with the Grounding Sheet?

Yes. Every Grounding Sheet order gets one, added to your cart at $0 with the same plug as your sheet. Order 2 sheets and a grounding mat comes with it too.

Will this tell me if my grounding sheet is working?

It checks the outlet, not the sheet. Correct means the ground behind that outlet is connected, which is the part your sheet depends on. To check the sheet itself, set a multimeter to continuity and put both probes on the fabric.

Which plug do I need?

US for outlets in the US and Canada (90–120V). EU for Schuko outlets (220–250V). UK for UK 3-pin outlets. AU for outlets in Australia and New Zealand.

My outlet only has 2 holes. Can I use it?

No. The tester needs a 3-prong outlet, and a 2-prong outlet has no ground port for a grounding product either. Talk to a licensed electrician.

The chart looks upside down.

Some outlets are installed with the ground pin on top. Turn your view so the printed chart reads upright, then read the lights left to right.

What if it shows Open ground?

The ground wire at that outlet is missing or disconnected. Try another outlet, and contact a licensed electrician to check the wiring.

Does Correct mean my wiring is 100% safe?

No. It screens for 7 common faults. Some problems, like a weak ground or a bootleg ground, can still show Correct. If in doubt, call a licensed electrician.

Why did my power go off when I pressed the button?

That's the test working. Your GFCI or RCD is built to cut power when it sees a fault. Reset it at the GFCI outlet or the breaker to bring the power back.

I pressed the button and nothing happened.

The outlet may not be protected by a GFCI or RCD. If it should be, contact a licensed electrician.

Does it need batteries?

No. It's powered by the outlet you plug it into.

How long does shipping take?

Processing takes 1 to 3 business days. Delivery is 7 to 10 business days in the United States, and 7 to 14 internationally.

You get a tracking number by email the moment it leaves. Full detail is on our Shipping and Delivery page.

What is your return policy?

Write to Support@thegroundport.com first. A person replies within 1 business day, with a name at the bottom.

If the tester came free with your Grounding Sheet, it's yours to keep, refund or not. Read the full refund policy.

Pairs well with

The Grounding SheetThe Grounding Mat