3M 7100040997 3M, Cold Shrink QT-II Indoor Termination Kit 6024K, 15-25/28 kV, 1.10-1.65 in (27,9-41,9 mm) Cable Insul. O.D., 3/kit

The 6024K QT-II kit is sized for cable insulation starting at 1.10 in (27.94 mm) outer diameter, with a jacket outside diameter range of 1.30 to 1.90 in (33.0 to 48.3 mm). Measure the insulation OD after you strip the jacket and shield, not the overall cable, and check the jacket OD as well. If your cable insulation measures under 1.10 in, this is the wrong body size and you need the smaller kit in the 6020K family.

No. The 6024K is an indoor, non-skirted termination intended for weather protected areas only. The non-skirted body has no rain sheds, so it does not have the creepage needed for outdoor exposure. For an outdoor pole top or weather exposed riser, use a skirted outdoor QT-II kit instead. Inside a sealed switchgear cubicle or a dry vault, the indoor version is the correct choice.

The 6024K covers 15 through 25/28 kV shielded power cable at 100 percent insulation level, with a 125 kV BIL. It is built for shielded cable only, one conductor per termination. Non-shielded or concentric neutral constructions outside that description are not what this body is designed around.

Yes, plan on buying connectors. The 6024K ships with enough material for three terminations but no lug or stem connector is included. Whatever lug you pick has to stay inside the kit's connector envelope: maximum 1.60 in (40.6 mm) outside diameter and maximum 4.50 in installed length. A lug with a bigger barrel than that will not let the cold shrink body seat properly.

250 kcmil is the conductor size listed for the 6024K, but conductor size alone does not decide fit on a cold shrink termination. The body is sized to the insulation OD, which starts at 1.10 in, and the jacket range of 1.30 to 1.90 in. Different insulation wall thicknesses on the same 250 kcmil conductor can land outside that window, so measure the actual cable before ordering.

Allow 21.80 in of maximum installed length for the finished 6024K termination, measured from the cable end of the body to the top. In a tight switchgear cubicle or a shallow termination cabinet, that dimension plus your lug and bus connection is what decides whether the cable can be dressed in. Check it before you cut the cable back.

One kit covers three terminations, which is exactly one three-phase run of single-conductor shielded cable. Each termination handles one conductor. If you are terminating both ends of a three-phase feeder, order two kits.

No heat, no flame. Cold shrink means the silicone body is factory expanded over a removable core; you slide it into position and pull the core out, and the rubber contracts onto the cable under its own elastic memory. That constant radial pressure keeps a live seal as the cable heats and cools under load, which is the main reason crews pick it over heat shrink in an energized building where open flame is a problem. The body goes on as one piece rather than a stack of separate stress cone and insulator parts.

Stress control is built into the one-piece body. A high dielectric-constant material inside the termination regulates the distribution of electric field stress at the shield cutback, so there is no separate stress cone to install. The silicone insulation is track resistant and hydrophobic, and the dielectric strength of the material is rated at 507 V/mil.

No breakout boot is supplied, and the kit does not include insulation rejacketing material. It terminates single-conductor shielded cable, three of them per kit. For a three-conductor jacketed cable that needs the phases separated at the jacket end, you need a kit supplied with a breakout boot.

Yes, the 6024K QT-II kit is manufactured in the United States, which matters if you are buying against a Buy American or domestic-content clause on a government or utility job. The finished termination body is grey.