Preformed Fittings

An Armor-Grip Suspension Clamp is an essential component used in overhead power transmission and distribution systems. It serves the critical function of suspending and supporting electrical conductors or cables in a secure and reliable manner. These suspension clamps are designed to withstand mechanical loads and environmental factors while ensuring the proper alignment and tension of the conductors, contributing to the overall stability and performance of the electrical grid.

Key features of Armor-Grip Suspension Clamps:

● Support and Suspension - They provide stable support and suspension for electrical conductors, preventing sagging and maintaining the desired conductor spacing.

● Versatility - Armor-Grip Suspension Clamps are versatile and can accommodate a range of conductor sizes and types.

● Durability - They are constructed from high-quality materials that are resistant to corrosion, ensuring a long service life even in harsh weather conditions.

● Safety -  Properly installed suspension clamps enhance the safety of overhead power transmission and distribution systems.

These suspension clamps adhere to industry-specific standards and guidelines to ensure their quality, performance, and safety. Standards can vary depending on the region and application, but they typically cover aspects such as design, materials, load capacity, and installation procedures. Compliance with these standards is essential for reliable and safe operation in electrical power systems.

An Armor-Grip Suspension Clamp is an essential component used in overhead power transmission and distribution systems. It serves the critical function of suspending and supporting electrical conductors or cables in a secure and reliable manner. These suspension clamps are designed to withstand mechanical loads and environmental factors while ensuring the proper alignment and tension of the conductors, contributing to the overall stability and performance of the electrical grid.

Key features of Armor-Grip Suspension Clamps:

● Support and Suspension: They provide stable support and suspension for electrical conductors, preventing sagging and maintaining the desired conductor spacing.

● Versatility: Armor-Grip Suspension Clamps are versatile and can accommodate a range of conductor sizes and types.

● Durability: They are constructed from high-quality materials that are resistant to corrosion, ensuring a long service life even in harsh weather conditions.

● Safety: Properly installed suspension clamps enhance the safety of overhead power transmission and distribution systems.

These suspension clamps adhere to industry-specific standards and guidelines to ensure their quality, performance, and safety. Standards can vary depending on the region and application, but they typically cover aspects such as design, materials, load capacity, and installation procedures. Compliance with these standards is essential for reliable and safe operation in electrical power systems.

● Dead-End - Bare; manufactured from similar basic material to that of the conductor to which it should be applied as used in general distribution construction. Where conductors are of homogeneous stranding the Rated Holding Strength approximates the Rated Breaking Strength of the conductor. On ACSR conductors the Rated Holding Strength approximates the full strength of the aluminium strands plus 10% of the steel core.

● Application and Inspection: Dead-ends must not be re-used after original installation. Lay direction of both conductor and dead-end must be the same when terminating bare conductor. Suitable thimble clevises, described elsewhere in this catalogue, are manufactured for use with dead-ends.

● Material - aluminum alloy

● Dead-End - Bare wire manufactured from similar basic material to that of the conductor to which it should be applied as used in general distribution construction. Where conductors are of homogeneous stranding the Rated Holding Strength approximates the Rated Breaking Strength of the conductor. On ACSR conductors the Rated Holding Strength approximates the full strength of the aluminium strands plus 10% of the steel core.

● Application and Inspection - Dead-ends must not be re-used after original installation. Lay direction of both conductor and dead-end must be the same when terminating bare conductor. Suitable thimble clevises, described elsewhere in this catalogue, are manufactured for use with dead-ends.

● Material - copper

These fittings designed for use with Dead Ends are cast in aluminium alloy LM6 and have a rated UTS of 40kN and 70kN. Suitable for use on HV Conductor terminations with insulators having tongue type spindles or tongue type adaptors.

The advantages of using this method of terminating are: 

● It is a distinct advantage to tension the conductors from the Thimble Clevis rather than from the cross-arm which is the alternative method. 

● The insulators are properly sited and placed in tension. 

● Conductor regulation, or sag, is made more precisely and easily. 

● The complete termination procedure is carried out quickly, efficiently, uniformly and safely. 

● 70 kN and 40 kN options.

Top ties of insulators, also known as insulator top ties, are crucial components in electrical power systems. They are used in overhead transmission and distribution lines to secure and support insulators, ensuring their proper alignment and stability. Here's an introduction to top ties of insulators and their use:

● Design: Top ties of insulators are typically made of materials like steel or aluminum. They come in various designs, including yoke-shaped or clevis-type, to securely attach to insulators.

● Function: These components are used to connect the top end of insulators to the supporting crossarms or structures. They play a crucial role in maintaining the insulator's vertical position, preventing it from swaying or tilting excessively due to wind or other external forces.

The Armored Rod Crossing Twin-Tie was developed and tested in conjunction with a major electricity supply authority and the original concept approved by the Department of Machinery and Occupational Safety. It fully protects the conductor either side of the insulator top at rod crossings.

● Tie Pad - For bare conductor a tubular elastomeric pad is supplied which must be 

placed under the conductor in the top groove of the insulator. The pad is not 

required with jacketed conductor. 

● Centre Section - Only the section applied to the conductor is helical, the remainder

is cabled to ensure a snug firm fit on the insulator. 

● Material Used - TWIN-TIES are

made of material compatible with the conductor to which they will be applied.

● Lay Direction: The Lay Direction of the tie must be the same as that of the conductor.

Side-Ties for bare conductor include a neoprene tie pad interspaced between the insulator and conductor. Because of the very small contact area afforded, high pressure and bending stresses may accelerate abrasion damage at the insulator-conductor interface if the conductor is not protected. In the case of plastic covered conductor it is unnecessary to use a Side-Tie pad since the plastic covering itself provides the necessary conductor protection at the insulator.

Parrot Ends to meet the corona onset and RIV requirement for most extra-high voltage application.

Armor Rods are intended to protect against bending, compression, abrasion, and arc-over, and to provide repair. The degree of protection needed on specific line depends on a number of factors such as line design, temperature, tension, and exposure to wind flow, and vibration history on similar construction in the same area. As a general guide, the following recommendations may be adapted to the specific conditions. Armor Rods are recommended as minimum protection for bolted clamp-type supports or suspensions. Armor rods are recommended as minimum protection for use with hand-tied spans of 90 metres or more. Line Guards are recommended as minimum protection for hand-tied spans of less than 90 metres in urban construction having no experience of vibration. The use of supplementary damping devices should be considered in areas experiencing a history of vibration problems. Spiral Vibration Dampers should be given serious consideration when distribution conductor spans exceed 105 metres and/or 15 percent tension at 16ºC.

SOHO Armor Rods are intended to protect against bending, compression, abrasion, and arc-over, and to provide repair. The degree of protection needed on specific line depends on a number of factors such as line design, temperature, tension, and exposure to wind flow, and vibration history on similar construction in the same area. As a general guide, the following recommendations may be adapted to the specific conditions. Armor Rods are recommended as minimum protection for bolted clamp-type supports or suspensions. Armor rods are recommended as minimum protection for use with hand-tied spans of 90 metres or more. Line Guards are recommended as minimum protection for hand-tied spans of less than 90 metres in urban construction having no experience of vibration. The use of supplementary damping devices should be considered in areas experiencing a history of vibration problems. Spiral Vibration Dampers should be given serious consideration when distribution conductor spans exceed 105 metres and/or 15 percent tension at 16ºC.

SOHO Armor Rods are intended to protect against bending, compression, abrasion, and arc-over, and to provide repair. The degree of protection needed on specific line depends on a number of factors such as line design, temperature, tension, and exposure to wind flow, and vibration history on similar construction in the same area. As a general guide, the following recommendations may be adapted to the specific conditions. Armor Rods are recommended as minimum protection for bolted clamp-type supports or suspensions. Armor rods are recommended as minimum protection for use with hand-tied spans of 90 metres or more. Line Guards are recommended as minimum protection for hand-tied spans of less than 90 metres in urban construction having no experience of vibration. The use of supplementary damping devices should be considered in areas experiencing a history of vibration problems. Spiral Vibration Dampers should be given serious consideration when distribution conductor spans exceed 105 metres and/or 15 percent tension at 16ºC.

Conductor Splices are designed as a single component outer-layer assembly for Sub-EHV only. 

● Joining - On all-alluminium, aluminium alloy, and copper conductors of homogeneous stranding, this Conductor Splice will hold a minimum of 90% of the rated breaking strength of, and provide better conductance than, an equal length of unspliced conductor. On ACSR conductor, this Conductor Splice will hold a minimum tension amounting to the full strength of the aluminium strands plus 10% of the steel core strength. Conductance will be better than in an equivalent length of unspliced conductor. 

● Restorative-Repair - Conductor Splices will restore original conductivity to all-aluminium, aluminium alloy, copper and ACSR type conductors. Full rated breaking strength will be restored to homogeneous stranded conductors. On ACSR, strength will be restored to all of the aluminium strands, but not to the core. When core damage on ACSR is suspected, consult the catalogue pages for Full Tension Line Splice.

Conductor Splices are designed as a single component outer-layer assembly for Sub-EHV only. 

● Joining - On all-alluminium, aluminium alloy, and copper conductors of homogeneous stranding, this Conductor Splice will hold a minimum of 90% of the rated breaking strength of, and provide better conductance than, an equal length of unspliced conductor. On ACSR conductor, this Conductor Splice will hold a minimum tension amounting to the full strength of the aluminium strands plus 10% of the steel core strength. Conductance will be better than in an equivalent length of unspliced conductor. 

● Restorative-Repair - Conductor Splices will restore original conductivity to all-aluminium, aluminium alloy, copper and ACSR type conductors. Full rated breaking strength will be restored to homogeneous stranded conductors. On ACSR, strength will be restored to all of the aluminium strands, but not to the core. When core damage on ACSR is suspected, consult the catalogue pages for Full Tension Line Splice.

Conductor Splices are designed as a single component outer-layer assembly for Sub-EHV only. 

● Joining - On all-alluminium, aluminium alloy, and copper conductors of homogeneous stranding, this Conductor Splice will hold a minimum of 90% of the rated breaking strength of, and provide better conductance than, an equal length of unspliced conductor. On ACSR conductor, this Conductor Splice will hold a minimum tension amounting to the full strength of the aluminium strands plus 10% of the steel core strength. Conductance will be better than in an equivalent length of unspliced conductor. 

● Restorative-Repair - Conductor Splices will restore original conductivity to all-aluminium, aluminium alloy, copper and ACSR type conductors. Full rated breaking strength will be restored to homogeneous stranded conductors. On ACSR, strength will be restored to all of the aluminium strands, but not to the core. When core damage on ACSR is suspected, consult the catalogue pages for Full Tension Line Splice.

Full Tension Line Splice is designed as a three component assembly.

The Core Splice is applied after removal of the aluminium strands down to the steel core.

Filler rods, when required, are applied over the Core Splice to re-establish the original outside diameter of the conductor.

● Sub-Sets: Individual rods (outer splice only) assembled and gritted into groups of two, three, or four, corresponding to tabular information appearing on details technical data page. 

● Core Splice: Galvanized steel, sub-setted and gritted. 

● Filler Rods: Aluminium alloy, sub-setted, or single rods, not gritted. Filler Rods are not required for selected sizes corresponding to tabular information on data pages. 

● Outer Splice: Aluminium alloy, sub-setted and gritted.

● Intended Use: T-Connectors join slack laterals (TAP) to vertically spaced primaries (RUN) which can be reached by bucket truck. Extra poles can be eliminated while permitting equal spans for street lighting. A pair of T-Connectors installed back-to-back provide a mid-span junction for vertically spaced primaries. Poles can be set back from intersections and buck-arms eliminated. T-Connectors are available for conductors of equal and unequal diameters (REDUCING TYPE). 

● Holding Strength: T-Connectors are conservatively rated at 25% of the rated breaking strength of the conductor. Because of their intended use on slack span laterals or junctions of continuous conductors, mechanical requirements are not expected to approach 25% R.H.S. 

● Line Angles: Slack span laterals (TAP) should not exceed the line angle shown in the illustration, to ensure ease of application and to avoid over stressing the T-Connector. 

● Conductivity: T-Connectors, both regular and reducing types, are designed to a minimum conductivity of 100% of the smallest conductor.

Helical arcing horn is a new design concept intended for use on distribution lines up to 66kV. 

● Helical arcing horns provide protection of the loop of helical dead ends and of the adjacent insulator, against lightning strike and flashover. They are designed to wrap over the legs of the applied dead end, with the arcing tip pointed towards the pole, on new construction as well as being easily retrofitted on existing installations. 

● Materials - These fittings are made of material compatible with the conductor to which they will be applied, and the arcing tip is of adequate design to provide the required degree of protection. 

GUY-GRIPS are generally recommended for wood pole distribution and telecommunication construction. Refer to section Big Grip dead-end, an alternative product recommended for staying transmission tower and antenna construction. Refer to the page for the Preformed Pulling Eye, designed to assist with the application of GUY-GRIPS on the stay rod. RATED HOLDING STRENGTHS are at least equal to those of the staywire. GUY-GRIPS is supplied with a cabled loop to ease application and to prevent stretch.

The Pole Top Make-Off is a complimentary fitting to the Guy-Grip, described earlier. It is in effect a custom built Pole Top Stay, and consists of a single set of 3 galvanised steel wires of 1400 M Pa strength, helically formed with a single unformed 700 M Pa core wire. The central part of the Make-Off is double-wrapped onto the pole top, after which the two legs are wrapped over the unformed wire to form a seven strand stay of similar strength and diameter to that of a normal staywire, the minimum effective “stay” length is 1800 mm. The central “king” wire is of sufficient length that the parts above the crossover may be utilised as an earth bond. Similar fittings are designed for use with thimble adaptors.

Designed to serve as a one-piece complete stay fitting from the pole top bracket to the eye

of the stayrod where the stay angle is fixed at 45°. This fitting can be customised to suit 

variable length needs, on request.

Double-Wrap GUY-GRIPS are designed to terminate solid or stranded wire used for stays, catenaries/messengers etc. at pole top positions, when Stay Insulators are NOT used. Suitable for varying pole diameter and for double wrapping, the Double-Wrap GUY-GRIP secures the strand at the top of the pole. A standard GUY-GRIP of the correct size is used to terminate the Staywire at the Stayrod.

Production Characteristics

● Positive grip upon the strand that cannot be displaced by bending or vibration. 

● Even distribution of pressure along a wide area, eliminating concentrated forces. 

● Fast, simple and uniform application. 

● Compatibility with the strand to which the fitting is applied.

Damping devices are designed for the single purpose of reducing vibration. This single function is entirely different from that of protecting against 

● stress concentrations, 

● fretting or abrasion, and 

● arc-over burning. 

Because of this, damping devices should be considered only as supplemental to Wraplock Tie, Armour Rod, Side Tie, Spool Tie, or other hardware at tangent supports. Dampers are also used as supplemental protection at dead-ends. 

Lashing Rods are intended for use on all types of messengered overhead cables. They are particularly adaptable to span obstructed by trees or short spans over traffic intersections. 

● Colour Code and Length - Assist in identification of size, corresponding to tabular information appearing on price pages. 

● Rod Diameter - Identifies size of metal wire, corresponding to tabular information appearing on price pages. For covered rod, approximate thickness of plastic is indicated in addition to rod diameters.

● Material Selection - Lashing Rods are made of the same basic material as the messenger to which they are applied. This pertains to galvanized, copperweld and alumoweld. 

● PVC SPACER UNIT - A new, inexpensive way of eliminating mid-span clashing on L.V. up to 4kV Distribution lines or telecommunications, circuits. Applied to parallel or converging lines, they maintain spacing required between adjacent spans. The helically formed legs assure absolute uniformity of each application. 

● Material - Made of rigid solid high impact polyvinyl chloride possessing excellent chemical and strength properties. Outdoor ageing tests carried out indicated that the material does not deteriorate in function or appearance from the effects of severe weather conditions. Industrial fumes and salt water cannot seriously degrade the properties of rigid vinyl, which has been formulated to resist ultra-violet rays.