MCM Electronics

18 Gauge Alligator Set - 10 pieces By Tenma (21-3315) MCM Part #21-3315

3 stars 3 reviews
Qty.Volume Price

Specifications Top

This 18 gauge alligator clip set is useful for a variety of testing applications. Made of high-quality, test cables with insulating clip covers.

  • Includes 10 pieces total (2 each of yellow, white, black, green and red)
  • Gauge: 18 AWG
  • Length: 24"

Part Numbers
MCM Part #:21-3315
Tenma Part #:21-3315
Package Specifications & Dimensions
Weight:0.25 lbs.
RoHS Comp:Yes
Warranty:90 days
Need to Return?
Length:8 in.
Width:3.5 in.
Height:1.5 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No

Product Reviews Top

  • by installpro

    on 3/13/2017

    Use them all the time

    Overall: 4 out of 5
    Top 10 Contributor

    I have picked up countless sets of these over the years, use them everywhere. From temporary set-up connections on installations, to temp wiring on the bench, troubleshooting, you name it. They work well all the time. With many I've cut one end off, and soldered to a device, using the clip on the other end for testing. Great with battery packs, small speakers, tone generators etc. I certainly recommend.

  • by praudio

    on 1/6/2017

    OK wire, bad connections

    Overall: 3 out of 5

    Measuring several of these leads, using my trusty old Tenma 72-960, confirmed with a Fluke 8060A, I got resistances as high as 0.35 ohms -- which would tend to lower somewhat if one tugged on or wiggled the wire near the clips. Then I pulled the clips off one and measured the wire directly, repeatedly getting a reading of 0.013 ohms using the Tenma meter. (Note that ambient temperature was only around 40 deg. F, as I did not bother heating up my lab for these tests.) 0.065 ohms per ft. compares reasonably with the spec'd value for 18 ga. copper wire with 32/33 stranding, especially given my cool test temperature. (I did not bother counting strands.)

    For comparison, I also similarly tested the 21-355, 20 gauge set (wire only), which came out at 0.020 ohms, or 0.10 ohms per foot -- which is just under stated values for 20 ga. copper wire with 20/30 stranding, for example. (I did count this time, finding 20 strands.) This pack of test leads also weighed substantially less than the 21-3315, which makes sense, given the smaller wire.

    All wire appeared to be copper -- there was no copper clad aluminum wire to fatigue and break early, add undue stiffness, or run up the resistance.

    All in all, I was relieved that the wire gauge, material, and resistance did check out. From many other sellers, you will get cheated! On the down side, for test leads, the stranding really should be much finer, and, one MUST pull these apart (a pain, literally, at times!) and properly solder the wire to the clips, preferably adding some extra strain relief. OTOH, this also gives the opportunity to generate additional color codes (say, yellow wire plus red boot) or even substitute higher quality wire, make longer leads, etc.

  • by mcmJames

    on 4/30/2012

    18 Gauge? Alligator Set

    Overall: 2 out of 5

    I purchased both the 20 gauge and the 18 gauge and could not tell the difference in wire diameter, weight, or performance. I measured resistance using a power supply that current limits at 1A to force a measurement current and a voltmeter. Resistance varied between 50 milli ohms and 500 milli ohms. The dominant resistance was the crimp at the alligator clip. I reworked the clips on several leads, soldering before crimping. Now both sets of leads measure from 21 milliohms to 23 milliohms. Without contact resistance, the 2' of 20 gauge should measure 20.3 milliohms. The same length of 18 gauge should be 7.5 milliohms less. The bottom line is do not pay the extra for the 18 gauge unless you are prepared to do some thorough testing when you receive the leads to see if you got what you pad extra for. Otherwise save your money, and buy the 20 gauge. Rework the crimp connections if you want better than 500 milliohms.

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