How to Guide

UL File No. E5238
UNDERWRITER’S LABORATORIES LISTED WIRE COMBINATIONS Page 2
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 Wire-Nut® Wire Connectors
Model
300 Volt Maximum
600 Volt Maximum
74B®
Strip #16
and
smaller
7/16”
(11,5mm);
all others
3/8”
(9,5mm)
1 #10 w/2 #12
1 #8
1 #10
1 to 3 #12
1 to 4 #14
2 to 5 #16
2 to 5 #18
3 to 6 #20
1 #10 w/1 #12
1 #10 w/1 to 2 #14, #16 or #18
1 #10 w/3 to 4 #16 or #18
1 #10 w/1 #12 w/1 #14 or #16
1 #10 w/1 #12 w/1 or 2 #18
1 #10 w/1 #14 w/2 #16
1 #10 w/1 #14 w/1 to 3 #18
1 #10 w/2 #14 w/1 #16
1 #10 w/1 #16 w/1 or 2 #18
1 #12 w/1 to 3 #14, #16 or #18
1 #12 w/4 #16 or #18
1 #12 w/1 #14 w/3 #16
1 #12 w/2 #14 w/2 #16
2 #12 w/1 to 2 #14
2 #12 w/1 to 2 #16 or #18
2 #12 w/1 #14 w/1 #16 or #18
2 #12 w/1 #16 w/1 to 2 #18
1 #14 w/1 to 4 #16, #18 or #20
1 #14 w/1 #16 w/1 to 3 #20
1 #14 w/1 #18 w/1 to 3 #20
2 #14 w/1 to 3 #16, #18 or #20
2 #14 w/1 #16 w/1 to 2 #18 or
#20
2 #14 w/1 #16 w/1 to 3 #22
3 #14 w/1 #16 w/1 #18, #20 or
#22
3 #14 w/1 #18 w/1 #20 or #22
3 #14 w/1 to 2 #16
3 #14 w/1 to 2 #18 or #20
4 #14 w/1 #16 or #18
1 #16 w/1 #18 w/2 to 3 #20 or
#22
1 #16 w/1 #18 w/3 to 4 #22
1 #16 w/2 #20 w/2 #22
1 #16 w/1 to 4 #18, #20 or #22
2 #16 w/1 to 3 #18, #20 or #22
2 #16 w/1 #18 w/1 to 2 #20 or
#22
3 #16 w/1 to 2 #18, #20 or #22
3 #16 w/1 #18 w/1 #20 or #22
4 #16 w/1 to 2 #18, #20 or #22
1 #18 w/3 to 4 #20 or #22
1 #18 w/2 #20 w/3 #22
2 #18 w/3 #20 or #22
2 #18 w/1 #20 w/3 #22