Klein Tools 69409 Line Splitter for Clamp Meter, Measures up to 15A Current Draw, 10x Measurement, Designed for North American Outlets

This item works great, and it’s compact to boot.Judging from instructions for clamp meters and accessory current clamps, many folks don’t seem to realize that one cannot measure current in a multiconductor flexible cord with a clamp meter, because the magnetic fields cancel. I’ve seen more than a few people—including a former boss—tripped up by this. What’s needed is a line splitter. Interestingly, none of my Fluke instructions suggest that as the solution.It’s possible to make your own splitter, as I did (picture 3). It works fine, but it’s a bit awkward to carry. It’s much easier—and less expensive—to use a commercial splitter. Commercial splitters are also more compact (pictures 1 and 4). The homemade splitter has one advantage, though: it’s made with #10 AWG wire, so it should safely handle 30 A—far more than I’d ever want to see on a 20 A circuit, but perhaps useful for a device with some serious problems. I’ve never had the need for it, though.It’s also possible to do direct measurements using a multimeter’s current inputs, but connecting everything can be a chore. I have a device that connects directly to a meter’s current inputs (picture 2), simplifying the process. But it’s dicey when trying to measure more than 10 A on most meters without blowing a fuse.I also have an Extech splitter (https://www.amazon.com/dp/B0000YHN9W), which also works well and offers a 1× reading as well as 10×. But the 1× loop is more a curiosity than anything else, and the extra loop makes it longer. I probably got it simply because previous splitters I had included 1× sections. There’s really no reason to not use the 10× multiplier, which effectively provides an extra digit of resolution—often a big deal when measuring small currents. The Extech splitter does include voltage test points, so it’s possible to measure voltage and current when the device is operating—sometimes useful if the device is drawing enough current to cause noticeable voltage drop. Measuring voltage and current simultaneously requires a second meter, but if the load is steady, the measurements can be made sequentially with a single meter.A comparison of all of these methods using a Fluke 87 (with a Fluke i400 current clamp for the splitters) got results that were within about ±0.02 A actual current—more than close enough for government work.There are other splitters, like the Triplett ET200 (https://www.amazon.com/dp/B07YT6LQBH) and FLIR TA55 (https://www.amazon.com/dp/B00NMVR2DM) that will probably also do the job. I can only really comment on the Extech and Klein; I would recommend either one.At least one reviewer has suggested using a power meter (I have the P3 P4400 Kill A Watt Electricity Usage Monitor, https://www.amazon.com/dp/B00009MDBU). Though it’s more expensive than most line splitters, it’s very easy to use and doesn’t require a meter. I can’t imagine an electrician showing up with one, but for someone who only needs occasional measurements, this could be a good option—and it provides much additional information. I wouldn’t trust it like the Fluke meters, but the indicated values were mighty close to those given by the high-priced tools. Again, close enough for government work. I guess I also would recommend this. There are less-expensive similar devices that I have not tried.If you need to measure current in a plug-connected device, a line splitter is essential—don’t leave home without one.

I used this with an existing external current clamp and my Fluke 87-V meter. It made connecting the current clamp very easy and the X10 feature scales up the voltage to provide sufficient measurement precision ("digits") with ordinary multi-meters. With my external current clamp, and the Fluke 87-V meter it seemed to provide a 1:1 reading on the display.

As usual with Klein, top notch product!

Klein tools are solid

As this is for up to 15 Amps you might be better off just buying a Killawatt Meter being as they are similarly or slightly higher priced. This does work, but for devices under 15 Amps a Killawatt Meter would be better..

Good Buy

This is a must have if you have an AMP clamp. This device allows you to measure amps on plugged in devices like refrigerators and computers, and whatever plugs into a wall outlet by simply plugging it into your wall outlet and then plugging your device into it…then clamping your ammeter to it. Works like a champ…Hope this helps.

very durable, accurate