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Amprobe INSP-3 Wiring Inspection Tester

by Amprobe
38 customer reviews
| 4 answered questions

List Price: $399.95
With Deal: $303.44 & FREE Shipping. Details
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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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Frequently Bought Together

  • Amprobe INSP-3 Wiring Inspection Tester
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  • Amprobe ELS2A AC Line Splitter
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Total price: $340.84
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Technical Details

  • Brand Name: Amprobe
  • Part Number: 3503207
  • UPC: 095969516181

Product Description

The Amprobe INSP-3, wiring inspector is a rugged circuit tester designed to test whether a building’s wiring is in compliance with electrical code in seconds, especially voltage drop under load. Without scrolling or switching screens, you can quickly identify issues with splices, connections and conductor quality, crucial to safety and performance of the electrical system. The flashing screen on this circuit tester will clearly indicate incorrect wiring or failures and it won’t trip circuit breakers or blow fuses during the test.

Product Information

Technical Details
Part Number 3503207
Item Weight1.8 pounds
Product Dimensions10.2 x 6.2 x 2.9 inches
Item model numberINSP-3
Item Package Quantity1
Number of Handles1
Measurement Accuracy±2%
Batteries Required?No
Technical Specification
Additional Information
Best Sellers Rank #43,189 in Home Improvement (See top 100)
Shipping Weight1 pounds (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item is not eligible for international shipping. Learn More
Date First AvailableOctober 5, 2010
Warranty & Support

Product Warranty: For warranty information about this product, please click here [PDF]

From the Manufacturer

Customer Reviews

Most Helpful Customer Reviews

9 of 9 people found the following review helpful By Joel Schopp VINE VOICE on April 25, 2013
Vine Customer Review of Free Product ( What's this? )
If you are an electrician, are buying a home with suspected electrical problems, own a home with suspected electrical problems, or are doing some electrical work yourself I highly recommend this tool.

The array of what it tells you is impressive:
* True root mean square voltage
* Frequency (60Hz unless something is very bad)
* Polarity
* 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.
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6 of 6 people found the following review helpful By Jose Paez VINE VOICE on May 16, 2013
Vine Customer Review of Free Product ( What's this? )
Hello everybody,

I've used this tool to check the electrical system in my house.

I admit I was a little scared about this tool because i don't know much about electricity but guess what? even though the user manual leaves some room for improvement, you can see videos in facebook explaining the functions.

The tool let me found some faulty circuit breakers that for some reason supported more consumption than they were supposed to. On the other hand, I found some weird things about the ground that normal 3 leds tester were unable to find. The thing was, the resistance was too high because of humidity some ground contacts at the outlets were corroded.

I found that about 30% of my house outlets were faulty and had to repair some terminals. This sounds alarming and it is, were I live there's no such thing as home code inspection but now thank to this very useful tool I rest assured my house is a safer place for my family and since my family means utterly everything to me, I can tell you I've learned some electrical things, My house works better, and I feel better too.

I greatly recommend this tool to every concerned father and husband with some DIY skills, not that difficult to understand but gives you peace of mind. If you're not DIY inclined, just make somebody with this or similar tool check your house because beyond local electrical codes, your house is where your beloved ones lives... and that's enough reason to be sure everything is working properly.

You can check circuit breakers, ground health, cabling and the lot... it's even funny to use.

Hope this helps!!!

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3 of 3 people found the following review helpful By MikeInOhio VINE VOICE on April 23, 2013
Vine Customer Review of Free Product ( What's this? )
If you are reading this review because you're struggling to get this tester to work properly, let me offer this advice: Don't use the POWER button. If you turn it on with the POWER button you'll likely be frustrated.

The INSP-3 is a professional hand-held tester that checks GFCI, AFCI, Polarity, Voltage Drop, True RMS voltage and Ground Impedance on 120 volt single phase circuits. It does not check the condition of the insulation.

It has a standard NEMA 5-15 three-prong plug you insert into the receptacle to be tested. If you want to test a circuit with old-fashioned 2 prong receptacles, you'll need to supply your own adapter.

The instructions included with this tool are rather brief. I struggled for 10 minutes trying to test for voltage drop on a GFCI circuit before I figured out that I should NOT turn the tester ON before using it! To be clear, the instructions don't actually say "Turn the tester on". I just assumed that pressing the POWER button was the first step ..... my mistake!

After that, the tester worked great. I went all through the house testing receptacles and found the living room circuit, which is the farthest from the service panel, has excessive voltage drop (11% @ 20 amps). That explains why my chop saw functioned so poorly that time I used it on the front porch and powered it with an extension cord from the living room.

GFCI testing reports the milliamps required to trip the device as well as the time (in tenths of a second) that elapsed before it tripped. This tester found one GFCI in my home that consistently tripped during the 15 amp load test, never allowing me to proceed to the ground fault test. That GFCI device has never given me trouble, so I'm impressed that the tester identified the problem.
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Amprobe INSP-3 Wiring Inspection Tester
This item: Amprobe INSP-3 Wiring Inspection Tester
Price: $303.44
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