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3M
Cold Shrink QS4 Integrated
™
Splice Kit QS4-15JCN-350-750
for Jacketed Concentric Neutral (JCN)
and Flat Strap Neutral Cable
Instructions
IEEE Std. 404
15 kV Class
150 kV BIL
F CAUTION
Working around energized systems may cause serious injury or death. Installation should
be performed by personnel familiar with good safety practice in handling electrical
equipment. De-energize and ground all electrical systems before installing product.
Kit Number
QS4-15JCN-350-750
* Splices (including size transitions) can be made to smaller or larger conductors (but larger conductors may require special neutral
handling), provided both cables are within the Insulation O.D. Range and the connector meets the dimensional requirements
shown below.
Outside Diameter
Length
Aluminum (Al/Cu) Compression
Length
Copper Compression and 3M
™
January 2014
78-8127-8864-0-C
Kit Selection Table
Cable Insulation O.D. Range
1.04"–1.70"
(26,4–43,2 mm)
Connector Dimensional Requirements
Shearbolt Connector QCI 350-750
Conductor Size Range
Minimum Inches (mm)
0.80" (20,3 mm)
—
—
350–750 kcmil*
(185–325 mm
)
2
Maximum Inches (mm)
1.84" (46,7 mm)
6.75" (171 mm)
7.50" (191 mm)
3
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Summary of Contents for 3M QS4-15JCN-350-750
- Page 1 Cold Shrink QS4 Integrated ™ Splice Kit QS4-15JCN-350-750 for Jacketed Concentric Neutral (JCN) and Flat Strap Neutral Cable Instructions IEEE Std. 404 15 kV Class 150 kV BIL F CAUTION Working around energized systems may cause serious injury or death. Installation should be performed by personnel familiar with good safety practice in handling electrical equipment.
-
Page 2: Kit Contents
1.0 Kit Contents a. 3M Cold Shrink QS4 Integrated Splice Body QS4-15JCN-350-750 (1 ea.) ™ b. Constant Force Springs (4 ea.) c. 3M Red Compound Tubes P55/R (non-silicone grease) (2 ea.) ™ d. Scotch Rubber Mastic Tape 2228 Rolls, 2" x 36" (2 ea.) ®... - Page 3 2.0 Prepare Cables 2.1 Check to be sure the cable fits within the kit ranges as shown on the cover page. 2.2 Prepare cables according to standard procedures. Refer to template provided or illustration below for proper dimensions (Figure 1). 12 3/4"...
- Page 4 2.5 Carefully bend the cut neutral wires up and away from the cable semi-con. Fold neutral wires over cable jacket, taking care to keep wire profile low by following the concentric turn in the cable. Secure the ends of the neutral wires with one wrap of vinyl tape.
- Page 5 Insulation removal length shall not exceed 3 1/2" (89 mm) from conductor end (Figure 6). Refer to connector instructions for dimensions Figure 6 3.2 Install 3M Shearbolt Connector QCI 350 - 750 according to the instructions included with the connector (Figure 7). Shearbolt Connector Figure 7...
- Page 6 3.3 If using a crimp type connector, remove cable insulation for 1/2 connector length plus an allowance* for increases in connector length due to crimping. Insulation removal length shall not exceed 3 3/4" (95 mm) from conductor end. Do not install connector now (Figure 8). *Note: This assumes that the installer has determined the increased length of an aluminum connector crimped with a specific tool and die.
- Page 7 3.5 Install connector. See table (on cover) for proper connector dimensions. (For standard 3M Connectors, refer ™ to table at the end of this instruction for crimping information). If using an aluminum conductor, wire brush aluminum strands and then insert into connector. Remove excess inhibitor compound and remove conductor from connector.
- Page 8 120 grit or higher electrical grade abrasive. d. Make certain that the cable insulation is smooth, clean and dry before continuing. 4.4 Apply 3M Red Compound P55/R on cable insulations, making certain to fill in edge of cable semi-con. Do ™...
- Page 9 5.1 Remove the vinyl tape holding the shield sleeve on the rejacketing tube, and spread the shield sleeve out toward the cable jacket. Note: The 3M Cold Shrink Integrated Splice Body includes a pre-installed ground braid for external ™ grounding on either side of the splice body. If not using the ground braid, it may be tied into the ground system with the shield sleeve using constant force springs as shown below.
- Page 10 Note: Use these instructions if using a long built-in ground strap for external grounding. 5.5 Remove the vinyl tape holding the shield sleeve on the rejacketing tube, and spread the shield sleeve out toward the cable jacket. 5.6 Hand-tighten the shield sleeve outward and secure it (along with the ground braid) to the neutral wires on either side of the splice using two constant force springs on each end between the vinyl tape at the jacket edge and the vinyl tape as shown (Figure 18).
- Page 11 5.10 Wrap two half-lapped layers of vinyl tape over all constant force springs (Figure 21). 1/2" Max (13mm) Vinyl Tape Figure 21 Go to Section 7.0 "Install Jacket." 6.0 External Grounding with Ground Wire (Optional) 6.1 Connect a ground wire to the pre-installed ground braid on the integrated splice using an appropriate connector. Keep connector profile as low as possible.
- Page 12 6.3 Place the other half mastic strip over the previously applied mastic and ground wire. Press the mastic around the ground wire and to the cable jacket (Figure 24). Ground Wire Second Half Mastic Strip Figure 24 6.4 Wrap two half-lapped layers of vinyl tape over the ground connector (Figure 25). Ground Wire Mastic Seal for Ground Wire Vinyl Tape...
- Page 13 7.0 Install Jacket Note: Jacketing is not optional. 7.1 Wrap a roll of slightly stretched Scotch Rubber Mastic Tape 2228, 2" x 36" around cable jacket at edge of cut ® neutrals (tacky side toward cable) (Figure 26). Stretch and tear off last 1–2" (25–50 mm) of mastic (Figure 27). If grounding was applied, apply tape over mastic strips.
- Page 14 7.3 Cut off yellow liners and discard. Figure 29 7.4 Connect optional grounding. Note: In applications where the splice is regularly exposed to high levels of ultra-violet radiation (i.e. direct sunlight), wrap two half-lapped layers of Scotch Super 33+ Vinyl Electrical Tape or Scotch Vinyl ®...
- Page 15 Crimping Tool — Die Sets (number of crimps/end) & ™ ) l i — — — — — — — — — — — — — — — — — — — — — — — — — — — —...
- Page 16 INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. If this product is defective within the warranty period stated above, your exclusive remedy shall be, at 3M's option, to replace or repair the 3M product or refund the purchase price of the 3M product.
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