3M 7000132746 3M, Splice Kit UF1 Standard, 1.8 in (45,7 mm) connector, 8.0 in (203,2 mm) heat shrink tube, 6 kits/case

That is exactly what the UF1 kit is built for. It makes a moisture-proof connection on type UF-B underground feeder cable, using heavy-wall heat shrink tubing over the connector body to seal out water. Use it on non-shielded cable only.

The UF1 accepts conductors up to 10 mm2, which is about a 8 AWG conductor. Anything larger needs a different splice kit or a compression connector.

Each kit contains four cylindrical set screw connectors separated by a piece of vinyl insulation, so a single kit handles a four-conductor splice inside one length of heat shrink tubing. The tube is 8.0 in (203,2 mm) long and the connector body is 1.8 in (45,7 mm).

Yes, 600 V is the rating on the UF1 kit, which covers standard low-voltage branch and feeder circuits. It is not a shielded-cable or medium-voltage splice.

Not on its own. The 3M UF1 Standard splice kit is a complete moisture-proof kit: four cylindrical set screw connectors separated by a piece of vinyl insulation, plus an 8.0 in (203,2 mm) heavy-wall heat shrink tube that provides the moisture protection for type UF-B underground feeder cable, rated 600V. The Burndy YS6C is a Hylink long barrel copper compression splice - a bare connector only, and it is crimped with a compression tool rather than tightened with set screws. If you use the YS6C you still have to build your own insulation and moisture seal over it, and you need the matching die/tool. The 3M kit needs only a screwdriver-style hex key for the set screws and a heat source for the tube.

The 3M UF1 Standard splice kit tops out at a 10 mm2 maximum conductor size, so anything heavier needs a different connector. The Burndy YS6C Hylink long barrel copper compression splice is the larger-conductor option in that situation - it is a compression barrel rather than a set screw connector, so plan on a hydraulic or battery crimper with the correct die, and on building the insulation and any moisture seal separately since the YS6C is supplied as a bare splice rather than as a kit with tubing.

The UF1 kit is rated from -67 to 230 degrees F (-55 to 110 degrees C), so freezing trenches and hot runs are both inside its range. The heavy-wall tubing is what carries the moisture seal once it is shrunk down.

No crimp tool is required. The UF1 uses set screw connectors, so the conductors are secured with a hex key rather than a compression die. You do need a heat source to shrink the tubing. If your job calls for a crimped copper connection instead, a compression splice like the Burndy YS6C Hylink long barrel copper splice is the other approach.

No. The UF1 is a non-shielded cable splice rated to 600 V. Shielded or medium-voltage cable needs a splice designed to rebuild the shield and stress control layers, and this kit does not do that.

It can be. The 3M UF1 Standard kit is built around heavy-wall tubing for a high level of moisture protection and a -67 to 230 degrees F (-55 to 110 degrees C) service range, which is what you are paying for in a buried or wet-location UF-B repair. In a dry indoor pull box where the splice will be insulated by other means, a plain compression connector such as the Burndy YS6C Hylink long barrel copper splice covers the mechanical and electrical joint without the heat shrink step. Bear in mind the YS6C is a compression connector needing a crimp tool and die, while the 3M kit uses set screw connectors.

Six kits per case. Each kit is a complete splice, so a case covers six four-conductor splices. Useful to know when you are pricing out a run with multiple tap points.

Yes. The UF1 kit is RoHS 2011/65/EU compliant without exemption, which is what most institutional and government submittals ask for. Country of origin is Taiwan.

The two are not separated on that basis in a useful way for spec purposes. The 3M UF1 Standard splice kit is specifically designed for use with non-shielded cables at 600V, so it is not the part for a shielded medium-voltage cable. The Burndy YS6C Hylink is a copper compression splice - a conductor connector - and it carries no shield continuity or stress control of its own either, so on shielded cable it would still require a separate shielded splice body or tape build. For shielded cable, look to a purpose-built shielded splice kit rather than substituting either of these.