Joining grip, steel, overhead lines, 4 sleeves

The following safety factors apply to Volta lifting products:

• Wire rope slings: 5 : 1
• Chain slings: 4 : 1
• Lifting accessories such as master links, shackles and hooks: 5 : 1

The working load limit (W.L.L.) is given in daN; 1 daN equals 10 N, i.e. roughly 1 kg.

Each anti-twist swivel is assigned a rope diameter and a breaking load. The values given are breaking loads.

The cable laying accessories are intended for these locations:

• Straight runs: cable laying rollers for straight-line laying, depending on type for cables up to ø 60 to 260 mm.
• Bends: cable corner rollers, depending on type for cables up to ø 100 to 280 mm.
• Manholes: manhole entry roller bends for cables up to ø 160 mm, cable rollers and cable protection bends for the manhole edge, and cable and rope entry devices for cables up to ø 100 mm.
• Cable conduits: cable guide units with protective rollers.
• Duct entry: entry guides and cable entry devices guide and protect the cable or pulling rope; the versions with clamping device are fixed in the duct.
• Run-off from the drum: cable guiding and run-off roller stands for cables and ducts.

• Galvanised steel: the standard material, suitable for all types of installation.
• Stainless steel: for use in the petrochemical industry, the food industry and under water.
• Nylon, Kevlar® or Dyneema®: where non-conductive or antimagnetic grips are required; they are light and in some cases reach high breaking loads.

Steel grips are braided from strands of 7, 19, 49 or 133 individual wires; the strands used depend on the gripping properties, the required breaking load and the intended application.

• Anti-twist swivel with compensating joint: it is fitted between the winch rope and the cable pulling grip and compensates the twisting that occurs during pulling. It is also available with a ball joint.
• Rigid rope connector: connects the winch rope with a pulling rope made of synthetic material or galvanised braided rope. It is designed to run over the grooved bullwheels of capstan cable winches.

The thread depends on the rod diameter:

The accessories for each rod have the same thread, for VOLTASIX for example starting heads, a connecting sleeve with swivel and a cable pulling grip, each with M6.

The two ranges differ in the connection and in the cable diameter:

• Civil installations: Only this range includes grips with an M4, M5 or M6 threaded connection, for example with eye and M5 pulling head, for cables from ø 4 to 31 mm, plus non-conductive nylon grips up to ø 40 mm. The threaded grips are among the accessories for fish tapes and fibreglass rods with the same sleeve thread, e.g. M5 for GIRAVOLTA and VOLTAFOX.
• Industrial installations: grips with an eye or a thimble, e.g. JST112 with one thimble for cables from ø 10 to 150 mm. For pulling with the winch rope, an anti-twist swivel is fitted between rope and grip to compensate the twisting that occurs during pulling.

All Volta cable pulling grips are braided by hand.

A cable pulling grip is not a disposable item, but it has a limited service life. This depends strongly on the field of application and the working cycles, especially under extreme conditions such as stringing overhead conductors, installing underground high-voltage cables or laying submarine cables.

Check every grip carefully before its next use. Damaged or even slightly frayed grips must be replaced.

For each fish tape, the table shows the suitable duct diameter, the breaking load and the working pulling force with start/end sleeve. The working pulling force is well below the breaking load.

No. The quick-grip hook is intended for lifting cable drums in a horizontal position via the central drum bore; it is not suitable for unwinding the cable or rope.

The three versions are rated for a maximum of 1,000 kg (M46200000), 2,000 kg (M46300000) and 5,000 kg (M46400000).

The VOLTANYL fish tapes ø 4 mm are available in three versions, each with a spring guide head with eye and a pulling head with eye:

• TP and NP: end fittings crimped on directly.
• TI and NI: interchangeable end fittings with M4 thread.
• TF and NF: interchangeable M4 end fittings, with the thread directly on the rod.

For ø 4 mm, TP, TI and TF are made of nylon (RAL 9002), NP, NI and NF of PERLON® (RAL 9017). The nylon tape has a breaking load of 280 kg and a working pulling force of 120 kg, the PERLON® tape 450 kg and 130 kg. VOLTANYL ø 3 mm is available with crimped or with interchangeable M4 end fittings.

• Select the grip by cable diameter, cable type (underground cable, overhead line, submarine cable) and type of installation (static or dynamic). Every Volta grip is embossed with its diameter range and breaking load.
• Always insert the cable over the entire working length of the grip; only then does the mesh achieve full grip on the cable sheath.
• Place laterally open grips around the cable and lace them with the two binding wires supplied, starting at the top and crossing through the mesh, evenly tight along the whole length, then knot the ends.
• The edges must neither gap nor overlap; either means that the wrong diameter was chosen.