Applications

Multi-core cable crutch / breakout - sealing and strain relief where the sheath splits into cores

LV power and control cables - 2-, 3-, 4- and 5-core, sheathed and armoured

Oil-contaminated environments - oil-resistant variant for machinery, pumps and plant rooms

Screened / stress-graded joints - semi-conductive variant where the breakout must continue the screen

Harness and loom manufacturing - branch sealing on multi-core assemblies

Marine, outdoor and buried cable runs - watertight branch protection

Panel and switchgear wiring - tidy, sealed core breakouts at cable entries

 

 

Key features & benefits

True branching geometry - moulded 2-, 3-, 4- and 5-core boots; the only product in the range that covers a cable crutch.

Watertight at every core - hot-melt adhesive on the body and all fingers seals each core entry, not just the cable entry.

Strain relief at the crutch - the moulded legs hold the fan-out angle and remove mechanical load from the sheath split.

Three material variants - insulated, oil-resistant and semi-conductive, to match LV insulation, oily environments, or screened / stress-graded service.

Optional flame retardant - flame-retardant breakouts available upon customer request.

Two adhesive forms - flat adhesive and spiral adhesive, to suit different cable and tooling requirements.

Tough, stable compound - tensile strength ≥ 12 MPa, elongation at break ≥ 300 %; ≥ 10 MPa and ≥ 230 % retained after 120 °C × 168 h ageing.

Reliable dielectric data (insulated / oil-resistant) - dielectric strength ≥ 15 kV/mm; water absorption ≤ 0.1 %.

Wide thermal range - brittle temperature −40 °C; heat shock 160 °C / 4 h, no cracking.

Controlled recovery - begins at 90 °C, fully recovered at 130 °C.

How the breakout differs from the straight-tube siblings

In short: the four tubes are straight sleeves for a single cylindrical run. The breakout is the only branch-shaped part - choose it specifically for the crutch of a multi-core cable, where a tube physically cannot follow the geometry and where each core must be sealed individually.

Technical specifications

Selection table - standard sizes

All dimensions in mm. D = body diameter, d = finger diameter, L = full length (± 5).

2-core breakout

3-core breakout

4-core breakout

5-core breakout

Remarks

★ - 3-core semi-conductive breakouts are available upon custom request.

☆ - 3-core or 4-core oil-resistant breakouts are available upon custom request.

The breakout is coated with hot-melt adhesive in two forms - flat adhesive and spiral adhesive - to meet different customer needs.

Technical data

 

How to select the right breakout

Count the cores - choose the 2-, 3-, 4- or 5-core boot to match the cable construction (e.g. a 4-core cable → WRSZT4 series).

Measure the cable sheath OD - this must fit inside the as-supplied body diameter (D min). Example: a 46 mm-sheath cable → WRSZT4-109/54 (D min 109 mm slides over).

Measure each core OD - all cores must fit through the as-supplied finger diameter (d min) and be gripped by the recovered finger diameter (d max).

Check the full length (L) - confirm the boot covers from the intact sheath, across the crutch, and down each core far enough for a proper seal. Standard L runs 125–245 mm.

Choose the material variant - insulated for normal LV service; oil-resistant where oil or fuel is present; semi-conductive where the breakout must continue a screen / grade stress.

Choose the adhesive form - flat or spiral hot-melt, depending on the cable and your tooling.

 

 

FAQ

Q: What is a heat shrink breakout used for? A: It seals and provides strain relief at the crutch of a multi-core cable - the point where the outer sheath splits into the individual cores. It is available for 2-, 3-, 4- and 5-core cable.

Q: How is this different from a heat shrink tube? A: A tube is a straight, single-leg sleeve for one cylindrical run. The breakout is a moulded branching boot with 2–5 fingers - the only product in the range that follows the geometry of a cable crutch and seals each core individually.

Q: Where is the adhesive? A: The boot is coated with hot-melt adhesive on the body and on the fingers, so it forms a watertight seal at the sheath entry and at every core exit. It is supplied with either flat or spiral adhesive.

Q: What material variants are available? A: Insulated, oil-resistant and semi-conductive. The oil-resistant variant is the one tested for dipping (≤ 20 % tensile variation, ≥ 230 % elongation after dipping). Flame-retardant breakouts are available on request.

Q: Which core counts are standard? A: 2-, 3-, 4- and 5-core, across 28 standard specs, with 3-core semi-conductive and 3-/4-core oil-resistant types available on custom request.

Q: What is the shrink temperature? A: Shrinking starts at 90 °C and the boot is fully recovered at 130 °C.

Q: How do I size it? A: Choose by core count, then match the cable sheath OD to the as-supplied body diameter (D min) and each core OD to the finger diameter range (d min → d max recovered).