How to Guide

UL File No. E5238
UNDERWRITER’S LABORATORIES LISTED WIRE COMBINATIONS Page 7
Combinations listed on this page are CU/CU Wire only. (Do not use on aluminum wire.) For use on solid and/or stranded
wire combinations unless noted otherwise.
Revised 7-14-2016
IDEAL UnderGround™ Wire Connectors
Model
600 Volt Maximum
64®
Strip
wires
5/8”
1 to 3 #10 or #12
2 to 4 #14, #16 or #18
3 or 4 #20 solid or 22 solid
1 #18 with 1 to 4 #16, #14 or
#12
1 #16 with 1 to 4 #14 or #12
1 #14 with 1 to 2 #12 or #10
2 #14 with 1 #12 or #10
2 #12 with 1 #10
1 #8 with 1 #12 or #10
Model
600 Volt Maximum
66®
Strip
wires 1”
1 or 2 #6
2 or 3 #8
2 to 5 #10
3 to 6 #12
1 #6 w/1 to 2 #8
1 #6 w/1 to 3 #10
1 #6 w/1 to 5 #12
1 #6 w/1 to 4 #14
2 #6 w/1 #10 or #12
2 #6 w/1 to 2 #14
1 #8 w/1 to 4 #10
1 #8 w/1 to 5 #12 or #14
2 #8 w/1 to 2 #10
2 #8 w/1 to 3 #12
2 #8 w/1 to 4 #14
3 #8 w/1 to 2 #14
1 #10 w/2 to 4 #12
1 #10 w/3 to 5 #14
2 #10 w/1 to 4 #12 or #14
3 #10 w/1 to 3 #12 or #14
4 #10 w/1 to 2 #12 or #14
1 #12 w/4 to 5 #14
2 #12 w/2 to 4 #14
3 #12 w/1 to 3 #14
4 #12 w/1 #14
IDEAL Twister® AL/CU Wire Connectors
Model
600 Volt Maximum
65®
Strip
wires
1/2”
(13mm)
Copper-to-Copper only combinations
Copper-to-Aluminum
combinations. Not for use on
Aluminum-to-Aluminum
conductors.
1 to 3 #10
4 #12 sol
1 to 3 #12
1 to 5 #14
1 to 6 #16
2 to 6 #18
3 to 6 #20
4 to 6 #22
2 #22 w/3 to 5 #20
1 #22 w/1 to 5 #18, #16
2 #22 w/1 to 4 #20, #18, #16
3 #22 w/1 to 3 #20, #18, #16
4 #22 w/1 to 2 #20, #18, #16
1 #20 w/1 to 4 #18, #16, #14
2 #20 w/1 to 3 #18, #16, #14
3 #20 w/1 to 2 #18, #16, #14
4 #20 w/1 to 2 #18, #16, #14
1 #18 w/1 to 4 #16, #14, #12
1 #18 w/1 to 2 #10
2 #18 w/1 to 4 #16, #14, #12
2 to 3 #18 w/1 to 2 #10
4 #18 w/1 to 2 #16, #14, #12
4 #18 w/1 #10
5 #18 w/1 #16 or #14
1 #16 w/1 to 4 #14, #12
1 #16 w/1 to 2 #10
2 #16 w/1 to 4 #14 3 #16 w/1
to 3 #14
3 #16 w/1 to 2 #12, #10
4 #16 w/1 to 2 #14, #12
4 #16 w/1 #10
5 #16 w/1 #14
5 #16 sol w/1 #10 sol
1 #14 sol w/1 to 3 #12
1 to 2 #14 w/1 to 2 #10
2 #14 w/1 to 2 #10
2 #14 w/1 #8
3 #14 w/1 #12 or #10
3 #14 w/2 #12
4 #14 w/1 #12 or #10
1 #12 w/1 to 2 #10
1 #12 w/1 #8
2 #12 w/1 #10
1 #10 w/1 #8
1 #22 w/1 #18 w/1 #16
1 #22 w/1 #20 w/1 to 2 #16
1 #16 w/1 to 2 #14 w/1 #12 or
#10
1 #16 w/1 #12 w/1 #10
2 #16 w/1 #14 #w/1 to 2 #12
2 #16 w/2 #14 w/1 #12
2 #16 w/1 #12 w/1 #10
3 #16 w/1 #14 w/1 #12 or #10
4 #16 w/1 #12 w/1 #10
1 #14 w/1 to 2 #12 w/1 #10
2 #14 w/1 #12 w/1 #10
1 #10 AL sol. w/1 to 2 #10 CU
sol.
1 #10 AL w/1 to 2 #12 CU
1 #10 AL w/1 to 2 #14 CU
1 #10 AL w/1 to 2 #16 CU
1 #10 AL w/1 to 2 #18 CU
2 #10 AL sol. w/1 #12 CU
2 #10 AL sol. w/1 #14 CU
2 #10 AL sol. w/1 #16 CU
2 #10 AL sol. w/1 #18 CU
1 #12 AL sol. w/1 to 2 #10 CU
1 #12 AL str. w/1 to 2 #10 CU
sol.
1 #12 AL w/1 to 2 #12 CU
1 #12 AL w/1 to 2 #14 CU
1 #12 AL w/1 to 2 #16 CU
1 #12 AL w/1 to 2 #18 CU
2 #12 AL sol. w/1 #10 CU
2 #12 AL sol. w/1 #12 CU
2 #12 AL sol. w/1 #14 CU
2 #12 AL sol. w/1 #16 CU
2 #12 AL sol. w/1 #18 CU