“ACSR 120” looks like a useful specification until a fittings supplier has to quote it. Different standards and conductor constructions can produce different overall diameters, strand arrangements and mechanical ratings under similar short names. A clamp chosen only from the nominal aluminum area may fit poorly or carry the wrong load.
Reliable ACSR conductor fittings selection starts with the actual conductor datasheet and the pole function.
Ask for the full conductor designation, applicable standard, strand construction, overall diameter, unit weight and rated tensile strength. If the project uses a code name such as Dog, Wolf, Panther or Drake, keep the numeric data in the same document. Code names are helpful, but the datasheet is the final reference.
Also confirm whether the conductor is conventional ACSR, ACSR/AW or another construction. The steel core and surface behavior can affect the approved fitting and installation method.
Suspension clamps support the conductor on tangent structures and allow controlled movement. The clamp groove must suit the conductor diameter, while the mechanical rating must suit the span, line angle and calculated loads.
A clamp that is too small can damage outer aluminum strands. One that is too large may not grip or support the conductor correctly. Where armor rods or preformed protection rods are used, the supplier needs to know whether the clamp range is based on the bare conductor or the protected assembly.
The connection above the clamp also matters. Confirm the insulator-string hardware, socket or clevis interface and the required orientation.
Dead-end fittings transfer longitudinal load at terminal, section and angle structures. Their selection cannot be copied from a suspension assembly.
State the conductor rated tensile strength, required holding strength, structure type and whether the clamp is compression, bolted wedge or preformed. Compression dead ends may require matching steel and aluminum components plus the correct dies. Preformed sets must match the conductor diameter and strand direction exactly.
Include jumper terminals and connection plates in the review. A strong dead-end body is not a complete assembly if the jumper cannot connect to the next device.
Parallel-groove clamps are commonly used for taps and jumper connections. Selection depends on the main and branch conductor materials and size ranges. Aluminum-to-aluminum and bimetallic connections should not be treated as the same item.
For a transformer tap, the path may include the line conductor, PG clamp, jumper conductor, terminal connector and equipment terminal. Confirming the complete path prevents a mismatch at the final palm or bolt hole.
Mid-span joints, full-tension compression joints and repair sleeves have different functions. A repair sleeve intended for damaged outer strands is not a substitute for a full-tension joint.
For compression products, provide the conductor construction and required joint type. The installation team also needs the approved compression sequence and die information. Supplying the fitting without the correct tool reference creates avoidable site risk.
The clearest purchasing method is to group fittings by structure rather than placing every item in one long list. Typical groups include:
Each group should show the assembly quantity per pole and the number of poles. This makes it easier to check shackles, links, yoke plates, bolts and split pins that are often missed in item-by-item procurement.
Steel hardware normally requires a corrosion-protection specification. State whether hot-dip galvanizing is required and identify coastal, industrial, high-humidity or other aggressive environments. Stainless split pins or special fasteners may be specified even when the main fittings are galvanized steel.
Packing should protect galvanized surfaces and keep complete sets together. Small hardware packed by pole type is easier to issue at site than mixed loose cartons.
For an accurate overhead line fittings quotation, send:
Younxin can review ACSR conductors, suspension clamps, dead-end clamps, PG clamps, joints, insulators and linkage hardware as connected sets. Send the conductor datasheet and pole drawings with the BOQ so the interfaces can be checked before production.
Related product page: Review the ACSR 400/50 overhead conductor specification and matching RFQ notes.
No. Overall diameter, construction, mechanical load and any armor rods must also be considered.
Some bolted products cover a defined range, but preformed and compression fittings are much more specification-dependent. Use the manufacturer’s approved range for the actual conductor.
It exposes missing connection hardware and gives the installation team complete, countable sets for each structure.
In overhead line procurement, the most expensive items receive the most attention. Yet installation is often delayed by small mechanical interfaces: a crossarm that does not fit the pole, a clamp outside the conductor diameter range, a missing ball-and-socket fitting or bolts that are too short for the mounting plate.
A Burundi 30kV distribution project showed why steel poles, crossarms, insulator strings and line fittings should be reviewed as one pole-top assembly rather than separate catalog items.
Not every pole carries the same load. The pole schedule should identify whether each structure is used as:
The required pole strength, crossarm reinforcement, insulator arrangement and foundation can change with the function.
In the project package, 16-meter galvanized steel poles were specified with strength classes expressed in daN. Before fabrication, the supplier should confirm what the stated load represents, the load application point, wind conditions, conductor tension, safety factor and foundation arrangement.
A tapered polygonal steel pole is different from a concrete or timber pole. Its diameter changes with height, and the flat faces affect how bands and mounting plates sit against the shaft.
The mounting package may include:
These accessories should be designed from the final pole drawing. Asking a factory to “include clamps” without giving the mounting height and local pole dimensions invites a mismatch.
The tangent crossarm reference for the Burundi line used a 2,100mm phase spacing and hot-dip galvanized angle-steel members. The documented reference sizes included:
These dimensions are useful design inputs, but they do not automatically define every crossarm in the project. Angle and terminal crossarms must carry higher longitudinal forces and should be checked against the conductor tension, deviation angle, insulator arrangement and pole strength.
The final crossarm drawing should show:
One recurring source of confusion is treating every pole-top clamp as a main-conductor fitting.
For an ACSR phase conductor, a tangent support assembly typically includes a suspension insulator string, suspension clamp and connection hardware. A dead-end assembly uses a tension insulator string and dead-end clamp to carry conductor tension.
A guard wire uses a different support and anchoring system. In the Burundi project documents, an M16 × 400 eye rod and anchor clamp belonged to the guard-wire assembly, not the ACSR phase-conductor suspension set.
This distinction affects both safety and ordering accuracy.
A typical tangent-pole phase-conductor set may include:
The exact configuration depends on the project standard and drawing.
A typical tension set may include:
For one project reference, the tension insulator string used three disc insulator units and a complete set of galvanized connecting fittings. That configuration should be treated as drawing-specific, not copied to every 30kV network.
The notation ACSR 35/6 or ACSR 95/15 describes conductor construction, but the fitting manufacturer still needs the actual conductor standard and outside diameter.
Two conductors with a similar nominal cross-sectional area may have different strand counts or diameters. A suspension clamp, dead-end clamp, PG clamp or compression sleeve must match the real conductor.
Send the following with the RFQ:
For outdoor steelwork, specify the galvanizing standard, minimum coating requirement and treatment of drilled or cut surfaces. Bolts, nuts, washers, crossarms, braces and mounting plates should be included in the corrosion review—not only the main pole.
Packing also matters. Galvanized surfaces can be damaged by unprotected metal-to-metal contact during container transport. Crossarms and brackets should be separated, secured and marked by structure type.
A pre-packing trial assembly is one of the most effective quality checks for a mixed pole-line package. It can confirm:
Photographs of the assembled set also help the site team understand how the parts relate to each other.
Younxin supports complete pole-line hardware packages based on BOQs, drawings and conductor data. Send your pole schedule and structure drawings for a coordinated quotation.
Not automatically. Angle and dead-end poles carry different mechanical loads and often need reinforced structures and different attachment points.
It depends on the drawing, but in this project the M16 × 400 eye rod was part of the guard-wire support and anchoring system, not the main ACSR suspension assembly.
Only when required by the project and approved safety arrangement. Their position, projection, anti-climb provisions and fall-protection requirements should be confirmed before fabrication.