|Item Weight||1.1 pounds|
|Product Dimensions||10.2 x 6.2 x 2.9 inches|
|Item model number||INSP-3|
|Item Package Quantity||1|
|Number of Handles||1|
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Amprobe INSP-3 Wiring Inspection Tester
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- Circuit tester for measuring, voltage, ground impedance, and voltage drop under load to verify building wiring compliance to code
- Digital tester with constant 10, 15, or 20A simulation regardless of line voltage
- Tests GFCI and AFCI protected circuits
- Compatible with standard 95 to 140V AC circuits
- Safety rated to European Standard 61010-1 Category II 120V
- Testing efficiency-relevant test data voltage, voltage drop, hot and neutral voltage drop, voltage with load
- Verifies if wiring is tested for load carrying ability that it meets electrical code recommendations for voltage drop under load
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From the Manufacturer
Amprobe INSP-3 Wiring Inspector Circuit Tester
Save Time and Money
The INSP-3 Wiring Inspector Tester is a rugged tester designed to verify building wiring compliance to electrical code, especially voltage under load. Testing electrical lines under load provides information on line conditions, which can diagnose issues such as high voltage drop and high ground impedance. Voltage drop relates not only to safety, but also to the function and reliability of electrical systems. Checking voltage drop under load assures that lines are in good condition, safe and will hold up for years of efficient operation. The INSP-3 saves time and money by eliminating the guess work associated with remodeling, new construction and maintaining wiring systems.
Packed with Features
The INSP-3 applies a constant 10, 15, or 20 AMP simulation current regardless of the voltage on the line tested. The unit tests ground fault circuit interrupter (GFCI) and arc-fault circuit interrupter (AFCI) protected circuits and non-protected circuits. The tester can be used on 95 to 140 VAC. Incorrect wiring or voltage test failure is clearly indicated by flashing values on the screen. The LCD displays all relevant test data (voltage, voltage drop, hot and neutral voltage drop, voltage with load, ground impedance) on a single large display to save the operator time. The device will not trip circuit breakers or blow fuses during testing.
A Wide-Range of Applications
The INSP-3 verifies that wiring meets electrical code recommendations for voltage drop under load. It will show how much specific drop is on the hot and neutral conductor. This is a great way to check splices, connections and conductor quality, which is crucial to safety and performance of computers and sensitive electrical equipment. Find faulty wiring that needs repair without removing outlet cover plates or panel covers, including faulty splices and connections, incorrect wiring, undersized wiring, faulty or incorrectly wired AFCIs/GFCIs, incorrect line voltage and poor ground quality. This is the tool of choice for hospitals, offices, homes, server data banks, RV parks and anywhere where proper receptacle wiring is critical for safety and performance. The INSP-3 is often used for home inspections and post wiring installation inspections to verify compliance with National Electrical Code (NEC).
- Rugged circuit tester designed to test whether a building’s wiring is in compliance with electrical code in seconds, especially voltage drop under load.
- Large display shows all relevant test data, no scrolling or switching screens needed
- Clearly indicates fault conditions with flashing values (incorrect wiring, voltage drop test failure or improper grounding)
- Test without tripping circuit breakers or blowing fuses with user selectable 10, 15 and 20 amp loads
- Check grounding for safety and ability to support sensitive electronic equipment
Important Notice: Using with GFCI/AFCI Protected Circuits
To avoid tripping the GFCI (ground fault circuit interruption) or AFCI (arc fault circuit interruption) protection, Press either the GFCI or AFCI button before you plug the unit into the outlet. To trip the breaker, plug unit into the wall without pressing the GFCI or AFCI button, the unit will test the GFCI/AFCI system by tripping the breaker.
For any technical support questions, please refer to the user’s manual or call 1-877-AMPROBE.
Top Customer Reviews
The array of what it tells you is impressive:
* True root mean square voltage
* Frequency (60Hz unless something is very bad)
* Voltage drop at 10/15/20Amp load for each of the hot and neutral wires (without actually putting that load on the wire and tripping your breaker)
* Loaded voltage (this and the voltage drop are ways of expressing the same thing)
* Ground Impedence
* GFCI/AFCI fault voltage
* Voltage difference between ground and neutral (common mode)
* If the breaker didn't exist what the wiring would limit a hot/neutral short current to
* If the breaker didn't exist what the wiring would limit a hot/ground short current to
The tool also flashes when any of these are out of spec. A few of my outlets had higher than spec voltage drops. These are worth following up on. Often it can be a bad splice at a wire juction, a bad connection to the outet, an undersized wire, or a bad outlet itself. At a minimum these are throwing away money when you use electric appliances in those outlets, but more concerning is these kinds of bad junctions can heat up and potentially cause fires.
Many people seem confused as to the operation of the device. The manual is written in real English, but does leave something to be desired. Below are my supplementary instructions:
1) If testing a normal non-GFCI/AFCI outlet do not power on the device, just plug it in.Read more ›
In a quick walk around of my medium-sized 2-story 1989-built home I found all kinds of issues (indicated by blinking measured values), where several plugs measured 10-26% drop at 15 amp load as well as a few shorted grounds (neutral to earth). The majority were 3-5% drop, which is within NEC recommended range. All of the GFCI circuits tripped at 6mA so I couldn't test the 30mA GFCI-test feature. Now I need to decide what to do with the 20%-drop circuits... that's pretty large, and potentially could cause trouble.
I primarily purchased this to verify new 120vac wiring installed in an out-building that will be running lots of motors and where I don't want excessive voltage drop. Further, I'm using power strips and extension cords and this easily tests those as well. I'd like to think all county electrical inspectors use something like this before giving their Final Approval... wouldn't take long to do the whole house.
Build quality looks good. Case is rubberized and has a good grip (similar feel to Fluke). Red color makes case easy to spot. Back-lit screen is easy to read and text is large enough I don't need my reading glasses. Battery case doesn't show polarity, but rather you need to look at size of connector slots and match up to battery posts. No issues putting tester and plug-wire into the zip-case if I put the tester *head-down*... fits perfectly.
I found operation to be intuitive after reading some of the other reviews:
* For regular circuits just plug it in and wait a few seconds for 15A results.Read more ›
The tester is very easy to use, just plug it in and it automatically turns on and starts testing. It continuously updates the numbers and tells you these things:
- Current unloaded voltage
- Polarity status (ok/not ok)
- Voltage % drop under load (buttons to choose 10, 15, 20 AMPs)
- Voltage % drop on hot and neutral
- Voltage under the load
- Ground impedance
ALSO ON SECONDARY SCREEN
- Common mode (voltage difference between the ground and neutral conductor)
- AMPs in the event of a hot + neutral fault
- AMPs in the event of a hot + ground fault
If any of the values are out of the recommended spec, the value will blink.
If you are testing an AFCI/GFCI outlet, you push the button and then plug into the outlet. It will test the outlet and you can push the button again to test the tripping.
This is certainly a great little device. If you are doing a bunch of wiring, it would be nice to have. If you are a professional, it is worth the money.
The packaging was easy to open, and it included a Duracell battery, the tester, plug, a case, and a small manual.
Installing the battery was mildly annoying as it requires a screwdriver that's not included. After installing the battery the screw for the battery door is already showing some burrs, so I suspect it's a pot metal screw.
Using the unit on a regular outlet is easy enough, plug it in, and wait a second or two, then the information is displayed on the screen. GFCI outlets were a little different. The first time I tried it, I switched the unit to GFCI and plugged it in, the outlet immediately tripped. I tried it again, and the outlet did not trip. The unit will prompt you while plugged in to press the GFCI button to test the GFCI tripping. That worked pretty slick.
The case (and the previously mentioned battery door) are the two weak points. The case will not hold the unit. It will hold the manual and plug with plenty of room to spare though. I'd have preferred that the case be padded and a bit bigger so it could hold the tester as well.
Most Recent Customer Reviews
My unit had an easy life just being used while rewiring my old house. Then it developed the internal fault/fuse failure other reviewers have mentioned. Read morePublished 16 days ago by Haef
My Amprobe does not work anymore. If you test Arc fault circuit breaker, this product is not for you.Published 2 months ago by ralph
I liked this unit at first - nice screen, quick response - but then discovered that it still wouldn't trip the new ACFI breakers in the new construction homes I was inspecting. Read morePublished 7 months ago by Amazon Customer
Great tester, but it should really ALSO handle 240V (outlets). 240V is where you find the LARGE loads, and an "impulse" tester for 240V (20, 30, 40, 50A) would be... Read morePublished 10 months ago by srl99
I have just returned my second INSP-3. The general functions worked, but it will not trip test the newer AFCI's and that is important for my type of work. Read morePublished 10 months ago by Joseph M. Griggs
The first unit faulted after five uses. Jumped through Amprobe's return hoops and received the second unit, it faulted (internal fault) after about twelve uses. Read morePublished 11 months ago by Blake W Walker
Excellent tool for the trained electrician. You need to spen some time with it getting to learn and understand its readings. Read morePublished 13 months ago by Vincent Blackshear
Great instrument! Accurate, easy to use and well worth the money! If you are looking for this type of tool... Take the plunge!Published 15 months ago by Tom @ TC HomeCheck