Motorsport Wiring Harness Parallel Splice Calculator for Mil-W-22759 Wires
This
calculator computes the diameter of your 22759/16
or 22759/32 Spec 55 splice wires so you can choose
the appropriate Molex Parallel Splice
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GAUGE INSIDE
DIAMETER (mm) O.D. (Inches)
22-18
1.5mm
0.130"
16-14
2.3mm
0.160"
12-10
3.3mm
0.225"
8 4.2mm 0.295" 6 5.8mm 0.374" 4 7.0mm 0.457"
Enter Number of Each Size 22759/XX
Wire Molex Versakrimp parallel splices are tinned copper non insulated "shorty" splices from 22 gauge all the way up to 4 gauge. These splices can be used in many configurations including inline (wire to wire) or as a closed-end end splice where you bring several wires together at a single point to terminate them all together. In motorsport wiring harnesses Parallel Splices should be used instead of Butt Splices as they are shorter and provide better strain relief. Commonly used is SCL adhesive lined heat shrink to cover these splices....Shrink and pinch the open end shut. The adhesive is black. Crimp Tools Rennsteig
and AMP
 Top above: We use the
Rennsteig PEW9 (P/N 619 031 3) Hex crimp tool. It
does a clean hex crimp on Molex Parallel Splices
22-18, 16-14, and 12-10.
KnipexAbove(2) : We also use our older AMP 49935 (22-18 / 16-14 / 12-10), and AMP 69363 ( 26-24 / 22-20) crimpers.  For 8ga Molex Parallel Splices we use an old Molex RHT-2080 crimper. Sargent
 Best Bet: A readily available crimp tool from Prowire is the Sargent 4235 CT crimper for Molex Parallel Splices up to 8 ga. For larger 4 ga. splices use the Prowire Molex Manual crimper 19294-0008 (will also work on 8 ga. splices).  Splice Example:
 Above: Example of splice planning. Here we are using two parallel splices to connect to 17 Analog Grounds with a Pectel SQ6M ECU. ES Caps-NO-1 (Clear) used. Raychem
ES Caps 4-1 Shrink
 Here on the left
we have eight 22759/32-20 wires into a Molex
12-10 Parallel Splice. Crimped with a
Rennsteig 6190313 Ratcheting Crimp Tool with
10.0mm hex crimp die.
On the right we have three 22759/16-14 wires into a Molex 12-10 Parallel Splice. Crimped with a Rennsteig 6190313 Ratcheting Crimp Tool with 10.0mm hex crimp die. A Raychem ES-1 Cap is used to seal these two spices. Wires here were stripped 8mm, the length of the Molex 12-10 splice. ES Caps are Black or Clear...Clear shown above. With clear you can inspect the seat depths. There are differing lengths (see PDF). Not all are stocked by distributors. No need to squeeze the end like with SCL...It is already sealed and small diameter. Clean solution for parallel splices. 4-1 Shrink ratio is a benefit. Cap I.D. mm before I.D inches before I.D. mm after Color Mouser Part Number ES Cap-No.0 4.57 mm 0.179" 1.02 mm Black ES-CAP-NO.0-O9-0-40MM ES Cap-No.1 5.7 mm 0.225" 1.3 mm Clear ES-CAP-NO.1-C1-X-30MM ES Cap-No.2 7.4 mm 0.293" 1.7 mm Black ES-CAP-NO.2-B9-0-35MM ES Cap-No.3 10.85 mm 0.427" 2.41 mm Black ES-CAP-NO.3-B8-0-40MM 
 Left Above: Here
we have ten 22ga (22759/16-22-30) wires into a
Molex 12-10 Parallel Splice sealed with 1/4"
x 3/4" SCL
heat shrink.
Lightly pinch the SCL shut with pliers when hot to seal the open end. Right Above: For the Molex Parallel Spices 22-18 and smaller use 1/8" SCL to shrink and seal the splice. Here we have three 22759/32-20-3 wires into a 22-18 Parallel Splice. Raychem PD-CAP's are available in 1/8, 3/16, 1/4, 3/8 and 1/2" diameters. 3-1 Shrink Ratio. Another non-SCL sealed end solution.
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