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Extech 480172 AC Line Splitter


Price: CDN$ 17.91 & FREE Shipping on orders over CDN$ 25. Details
Only 10 left in stock (more on the way).
Ships from and sold by Amazon.ca. Gift-wrap available.
  • Allows clamp meter to measure AC current on a 2-wire or 3-wire power cord
  • Provides easy and safe measurements of current without the need to cut off the plug and separate the conductors
  • Plugging the power connector into the line splitter separates the hot/live conductor from the neutral (and ground)
  • Also features voltage check function
See more product details

Product Information

Technical Details
Part Number480172
Item Weight159 g
Product Dimensions13.3 x 5.1 x 2.5 cm
Item model number480172
Voltage600 volts
Item Package Quantity1
Length13.3 centimeter
Width5.1 centimeter
Height25 millimeters
Additional Information
Best Sellers Rank #8,687 in Tools & Home Improvement (See top 100)
Shipping Weight159 g
Date First AvailableDec 18 2013
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Product Description


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Customer Reviews

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Most helpful customer reviews

Very usefull to measure current of pretty much everything that operates under 120VAC. Still unsure though about the 10x accuracy. Did some tests with different clamp meters and didn't quite get the 10x value when compared to the 1x. Perhaps the reading error is induced by the meter's range itself, the positionning of the clamp, or whatever else. For general troubleshooting purposes and reasonnable accuracy, it does the trick.
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By Rick Beauchamp on Sept. 1 2014
Verified Purchase
everything as expected. all is good
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By lonny gammel on Dec 6 2014
Verified Purchase
Great device works well .
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Most Helpful Customer Reviews on Amazon.com (beta)

Amazon.com: 93 reviews
43 of 48 people found the following review helpful
Higher price and fewer features than similar designs April 22 2008
By HMMWV - Published on Amazon.com
Like the Elenco ST74 ST74 AC Line Splitter, this product has a X1 and X10 current loop transformer and a line / neutral banana jack for measuring voltage.

You can read my review on the ST74 for the advantage of having a X10 loop to use with your meter, but this design lacks some desirable features found on the ST74.

I should point out that both products insist on hanging from the outlet supplying power. This is fine for a new, high quality outlet, but often problems happen with old, worn out jacks that barely grip a heavy cord. Remember that the outlet must support both these devices and the weight of your amp clamp.

The missing features here are:

1 - there is no banana jack for "EARTH/GROUND". Since outlets can be miswired, or have an open earth connection, this is an important line to be able to probe safely. The ST74 has this jack

2 - the output jack to your appliance is ONLY for the US standard. This is fine most of the time, but on the rare chance you need to test a foreign plug, the "UNIVERSAL" jack on the ST74 will let you plug almost any power cord into it.

3 - Finally the ST-74 costs a little less. I do think this is better built than the ST-74, but that's just from "feel" of the product. Both products "hang" off the power outlet you put them into and lack a 6" or 12" power cord, which would be nice to accommodate inconveniently located outlets or outlets that won't support the extra weight of a current transformer + amp clamp. I would give this 4 stars if it had a power cord and 5 stars if it had a ground jack as well as the line and neutral. I've seen too many worn out power outlets that won't hold onto an adapter plus an amp clamp.

If you don't care to measure ground impedance, don't think you'll ever work on foreign power cord devices, and have some more money, then its fine for you. But the ST-74 still does more for less and is a better value.
17 of 18 people found the following review helpful
defective plus they lie about the cable inside. July 23 2011
By Rob - Published on Amazon.com
Verified Purchase
The outlet on this was defective from day one they had the prong bent wrong on the inside. So I had to open it up and hook up my own 14 gauge wire inside. When I looked at the wire inside i noticed it was only rated for 300 voltes not 600 like it says on the outside. how did this even pass UL listed.

Im sure you it would work fine if you get one that the plug isnt bent.
11 of 11 people found the following review helpful
A must have for anyone doing DIAGNOSTICS! Nov. 7 2010
By A. LOCOCO - Published on Amazon.com
Verified Purchase
Sitting in a diagnostics class my instructor was going on about a gizmo he built that seperates the lines so a clamp meter can be effictively used. He claims he built this doo-hickey for about $25. I thought thats great as I pulled this out of my tool bag. It is way smaller and does not look like some mad-scientist made it in his shed. My instructor thought it was nice then asked "what did this fancy thing set you back?" When I told him about $12 everyone was impressed, including him. I have used it a few times in the field and in class to complete assignments but it is way easier than disconnecting and jumping hard-wired equipment that had 2/3c wrapped in the case. Not something I figure I'll use every day but well worth the investment.
8 of 8 people found the following review helpful
Defective outlet or poor design Nov. 26 2012
By LLL - Published on Amazon.com
Verified Purchase
The 120 V outlet is either defective or poorly designed (or perhaps both). A standard 3-wire grounded plug only makes contact the last 1/8" of insertion. Any slight movement of the plug breaks the circuit. The connectors for a voltmeter also did not fit properly (way too tight). In the same order I also bought the Amprobe ELS2A splitter. It is much better made and all of the connectors worked well. I returned the Extech unit to Amazon in exchange for another Amprobe unit.
7 of 8 people found the following review helpful
Receptacle cheaply made, wrong shape, cords pop out Jan. 17 2013
By R. Matteson - Published on Amazon.com
Verified Purchase
The first line splitter I received made a rattling noise. Loose metal parts, and would not hold a power cord on the load side. I did not risk plugging it in to AC supply.

Amazon shipped a replacement promptly. This had no rattling parts, but the receptacle still would not hold a power cord reliably. I tested with ten different appliances and devices. In most cases, the power cord would immediately be popped back out of the line splitter. In the other cases, the cord would pop out a few minutes later, causing electrical arcing if the load was drawing current.

It looks like Extech has made a bad batch of these where the receptacle is not compatible with standard power cords. I'm giving up and ordering an Amprobe ELS2A.