Technical Guide
When comparing OPGW cable specifications, fiber count is only the starting point. Cables with the same fiber count can have different diameters, weights, tensile ratings and electrical characteristics. A useful comparison therefore starts with the line specification and the proposed cable construction, not the number of fibers alone.
Optical ground wire combines communications fibers with the functions of an overhead ground wire. The scope of IEC 60794-4-10 covers optical, mechanical, environmental and electrical performance. That breadth explains why an OPGW purchase needs input from both communications and power-line specialists.
For the earlier choice between cable types, see our ADSS vs OPGW comparison. The checklist below is for buyers who are now evaluating OPGW proposals.
Start with the project requirement, then compare the construction
Our OPGW catalog presents central-tube and stranded constructions. The listed designs combine optical units with metallic strands, and the technical tables distinguish parameters such as cross-sectional area, rated tensile strength, DC resistance and short-circuit capacity.
A product family name is useful for finding candidates, but an order should identify the actual construction drawing and datasheet revision. When a supplier proposes an alternative, ask for a deviation list showing where it differs from the requested design.
For a replacement project, include the existing ground-wire information and the project engineer’s replacement criteria. Do not assume that matching the old cable’s diameter alone establishes equivalence.
OPGW cable specifications to compare side by side
| Specification item | What to compare or request |
|---|---|
| Construction and materials | Cross-section drawing, optical-unit arrangement, strand materials and dimensions |
| Diameter and unit mass | The stated values and tolerances for the proposed design |
| Mechanical performance | Rated tensile strength, defined operating and installation limits, and design data requested by the line engineer |
| Electrical performance | DC resistance with reference temperature, and short-circuit duty with its stated thermal conditions |
| Optical requirements | Fiber count, exact fiber specification, identification scheme and agreed optical acceptance criteria |
| Interfaces and supply scope | Fittings, joint closures, down-lead arrangements and other items included or excluded |
A missing parameter is an open clarification item, not a value to borrow from a similar model. Keeping those gaps visible gives the buyer and supplier a specific list to resolve.
Read short-circuit capacity together with its conditions
A short-circuit figure without a defined basis is incomplete for comparison. Ebocom’s catalog, for example, presents short-circuit capacity in kA²s and states a temperature basis. Those conditions belong with the value whenever it is used.
Ask the project’s electrical engineer to provide the required duty for the OPGW, including the applicable fault conditions and duration. Ask each supplier to state the initial and final temperature assumptions, supporting calculation or test basis, and any limitations attached to its proposed rating.
Use the project-approved duty for the proposed OPGW in this comparison. Avoid comparing two published kA²s values as interchangeable when their thermal assumptions differ.
The purchasing action is straightforward: place the project requirement and each supplier’s response in adjacent columns, with units and assumptions shown. Refer unresolved differences to the responsible engineer before accepting an alternative.
Specify the evidence you need before purchase
The quotation stage is the right time to agree on the document package. A practical request can include the proposed construction drawing, completed technical schedule, relevant type-test reports, routine inspection records and drum identification requirements. The final package should follow the project’s acceptance plan.
A useful report review connects the tested construction to the offered design and the tests being claimed. If the report covers a representative design, its applicability needs a documented basis. A standard number on a brochure does not, by itself, demonstrate that a specific cable passed the required tests.
State the standard and edition required by the contract. Ask the supplier to identify the requirements addressed by the offered design and provide the supporting records requested in the contract.
What should an OPGW RFQ contain?
- Project specification, required standards and editions.
- Line route, span and loading information, plus relevant existing-wire data for replacement work.
- Fiber count, fiber type and optical acceptance requirements.
- Required mechanical and electrical performance, with units and calculation conditions.
- Approved construction constraints and the procedure for proposing alternatives.
- Total quantity, requested drum schedule, joint locations and accessory scope.
- Required inspection documents, witness points if applicable, and acceptance responsibilities.
- Destination and commercial delivery requirements for the quotation.
Compare compliant scope before comparing price
Separate confirmed compliance, declared deviations and unanswered items in the bid review. Only then compare prices for the same supply scope. This prevents a cable-only offer from being compared directly with a package that includes fittings or additional inspection work.
Browse Ebocom’s OPGW cable range and send the project specification with your RFQ. If a requirement is still under engineering review, identify it in the inquiry so the quotation’s assumptions remain visible.
