HOW TO CREATE A TEE SPLICE
(COMBINING THREE CABLES)
1. Allow 6” of extra length on each heating cable.
2. From the end of the cable, strip away 3” of outer
jacket using utility knife. Do not cut into inner jacket.
3. Push back braid to loosen. Spread apart braid, bend the
heating cable and work it through the opening in the braid.
4. Twist the braid into a pigtail.
5. Using wire cutter, cut off approximately 1" of the exposed
cable so that only 2" of the exposed cable remain.
6. Using utility knife, strip away 1¼" of the inner jacket.
7. Using scissors, cut down the middle of the conductive
core lengthwise to separate into two parts. Do not cut
into the inner jacket.
8. Completely remove ½" of the conductive core from
the tips to expose both of the bus wires.
TIP:
Light score the conductive core at the ½" mark.
Be sure not to contact the bus wires while scoring.
Using pliers, lightly hold the scored conductive core
section and twist continuously until conductive core
breaks at the score mark.
9. Remove as much of the conductive core from the
middle without exposing any more bus wire. This will
allow the heating cable to fit easily into the blue heat
shrink crimps in Step 14.
10. Repeat steps 1-9 on the other two cable lengths.
11. Locate the piece of mastic strip and cut the strip into
three equal pieces. Stretch and wrap each piece onto
the outer jacket of the heating cable approximately ¼"
away from the ground braid.
16. Slide the 3½” long black heat shrink to cover the
crimps and partially cover the inner jacket on both
ends of the splice connection. Ensure the ground
braids are not inside the heat shrink. Using the heat
gun, fully heat shrink the tube until inner sealant
appears and no more shrinkage is apparent.
17. Slide the metal crimp sleeve onto one of the two ground
braids. Bend the cables together to allow some slack so
that two ground braids can easily overlap.
18. Slide the metal crimp sleeve over the overlapped ground
braids and crimp twice to make sure the connection is
secured. Use the 14AWG slot on the crimp tool (Tyco
AD1522 or equivalent) to crimp the metal crimp sleeve.
NOTE: Nuheat recommends conducting continuity
testing at this point of the installation.
19. Locate the piece of mastic strip and cut the strip into
two equal halves. Stretch and wrap each piece onto
the outer jacket of the heating cable approximately ¼"
away from the ground braid.
20. Twist crimped braid connection to ensure it lays flat against
flat side of cable. Slide the 8" long black heat shrink over
the entire splice connection so that it covers the mastic strip
on both sides. The heat shrink should overlap the splice
connection by 1½" on both sides of the splice connection
Using heat gun, fully heat shrink the tube.
21. Wrap one end of the connection with the 4" long
aluminum tape ½" away from end of heat shrink tube
toward center of connection. Repeat if necessary to find
best lay angle to ensure mastic tape under the heat
shrink is fully covered by aluminum tape. Smooth tape
with fingers to ensure no sharp edges.
22. Slide the 8½" long black heat shrink over entire splice
connection so that it overlaps the previous heat shrink
equally on both sides. Using heat gun, fully heat shrink tube.
3"
2"
1 ¼"
2"
1"
3"
2"
½"
½"
¼"
¼"
2"
2"
1½"
½"
¼"
¼"
1"
1"
1"
¼"
1¼"
1¼"
1½"
1½"
sp 6
sp 15
sp 3
sp 7
sp 16
sp 16
sp 8
sp 10
sp 17
3"
3"
sp 13
sp 18
tee 11
tee 20
sp 20
T21
T22
T22
T23
T24
sp 22
3"
2"
1 ¼"
1½"
1"
3"
2"
½"
6.5"
½"
¼"
¼"
1½"
1½"
1½"
¼"
¼"
1½"
1½ "
1½"
1½"
7"
sp 6
sp 15
sp 3
sp 7
sp 16
sp 8
sp 10
sp 10
sp 17
3"
3"
sp 13
sp 18
sp 18
tee 11
tee 20
sp 20
T21
T21
T22
T23
T24
sp 22
6.5"
7"
3"
2"
1 ¼"
1½"
1"
3"
2"
½"
6.5"
½"
¼"
¼"
1½"
1½"
1½"
¼"
¼"
1½"
1½ "
1½"
1½"
7"
sp 6
sp 15
sp 3
sp 7
sp 16
sp 8
sp 10
sp 10
sp 17
3"
3"
sp 13
sp 18
sp 18
tee 11
tee 20
sp 20
T21
T21
T22
T23
T24
sp 22
6.5"
7"
3
/
4"
3
/
4"
3"
3"
3
/
4"
3
/
4"
3
/
8"
3½"
3½"
6 3/4"
1
/
2"
1/4"
7"
8"
3"
3½"
6 1
/
2 "
3"
2"
1 ¼"
2"
1"
3"
2"
½"
½"
¼"
¼"
2"
2"
1½"
½"
¼"
¼"
1"
1"
1"
¼"
1¼"
1¼"
1½"
1½"
sp 6
sp 15
sp 3
sp 7
sp 16
sp 16
sp 8
sp 10
sp 17
3"
3"
sp 13
sp 18
tee 11
tee 20
sp 20
T21
T22
T22
T23
T24
sp 22
