
42 G 2.5MM2 SEMOFLEX DRUM PUR REELING DRUM CABLE SIZE 120X80X155 CM — technical design, reel mechanics, logistics dimensions and Feichun equivalent
The supplied procurement phrase identifies a 42-core, 2.5 mm² SEMOFLEX DRUM PUR cable for repeated winding on a reel and gives a size of 120 × 80 × 155 cm. Public Baude catalogue data distinguish the exact 42 G 2.5 row from the higher-tensile 42 G 2.5 Bd bundle-stranded row. This guide keeps the supplied wording intact, uses the non-Bd row as the primary reading, and flags the Bd suffix as a quotation gate rather than silently selecting the wrong OD, mass or tensile value. public catalogue reference
Contents
- Engineering position
- How to read the supplied designation
- Source hierarchy
- Reference construction
- Exact catalogue data
- 42 G 2.5 vs 42 G 2.5 Bd
- Reel mechanics
- Logistics and packing envelope
- Dynamic failure physics
- Application scenarios
- Installation and commissioning
- Feichun functional equivalent
- Certification and documentation
- RFQ release checklist
- Source audit
1. Engineering position: this is a moving power-and-control system
Provide a 0.6/1 kV low-voltage power/control path with the specified conductor resistance, insulation resistance, test voltage and PE continuity.
Distribute curvature through fine strands and a controlled core lay so that individual copper wires do not become the first fatigue point.
Use PUR as the contact surface against abrasion, oil, outdoor contamination and repeated reel-layer pressure.
Control radius, torsion, pay-out direction, guide spacing, layer build-up and spare turns. The drum is part of the cable design.
Bd. Use 42 G 2.5 as the primary identity, but ask the purchaser to confirm whether the intended product is the bundle-stranded high-tensile variant 42 G 2.5 Bd.2. How to read the supplied designation
| Supplied field | Engineering reading | What must be confirmed | Status |
|---|---|---|---|
| 42 G 2.5MM2 | 42 nominal cores, each with a 2.5 mm² conductor cross-section; G indicates a green-yellow protective-earth conductor in the catalogue convention. | Whether the 42 count includes the PE core, the core identification plan and the actual conductor resistance. | User-supplied / catalogue convention |
| SEMOFLEX DRUM | Baude Semoflex Drum family for PUR-sheathed drum/reeling service. | Current manufacturer datasheet, exact product revision and certificate scope for the ordered variant. | Family identity |
| PUR REELING DRUM CABLE | A cable intended for repeated winding and unwinding on spring or motorised drums and similar moving equipment. | Drum type, travel, speed, acceleration, cycles, guide layout, environment and termination restraint. | Application identity |
| SIZE 120X80X155 CM | A supplied logistics or packing envelope, not an electrical size and not automatically the cable OD or reel barrel. | Packing list, gross/net mass, reel drawing, flange diameter, barrel diameter and usable cable length. | Logistics field |
| No Bd suffix | The raw string does not explicitly request the bundle-stranded catalogue variant. | Written confirmation before using the 33.5 mm, 1,848 kg/km and 3,675 N Bd-row data. | Critical configuration gate |
Semoflex Drum 0.6/1 kV, 42 G 2.5 mm², PUR drum/reeling cable, primary non-Bd row, supplied package size 120 × 80 × 155 cm. Keep the raw all-capital wording in the RFQ subject line for traceability.3. Source hierarchy and data boundary
| Reference | Role | What it supports here | Boundary |
|---|---|---|---|
| Baude official reeling-cables page | Family application context for Semoflex Drum. | Outdoor, high-mechanical-load applications including hoists, transport equipment and motorised reels. | Official family page |
| Baude product catalogue, Semoflex Drum page | Exact public 42 G 2.5 and 42 G 2.5 Bd rows. | Copper amount, approximate OD, approximate mass and tensile-load values. | Exact public row |
| Baude Semoflex Drum technical application | Construction concept and mechanical limits. | Semocore insulation concept, textile braid, PUR sheath, reeling radius factors and system benefits. | Official technical PDF |
| Baude Semoflex Drum installation instructions | Handling and installation controls. | Top-side pay-out, two spare turns, support grip, twist removal and S-shaped guide spacing. | Official installation PDF |
| Public Semoflex Drum product summary | Supplementary family technical summary. | 0.6/1 kV, temperature range, 4 kV core-to-core test, oil/flame context and up to 200 m/min public summary. | Independent public summary |
| IEC 60228 | Conductor-class framework. | Use for conductor resistance and strand-class verification. | Standard context |
| IEC 60332-1-2 | Flame-test method context. | The ordered cable must carry the applicable current test evidence; a generic reference is not a certificate. | Standard context |
4. Reference construction: why Semocore, braid and PUR work together
Figure 1 — Engineering schematic of the 42-core Semoflex Drum architecture. The numbered cores show the supplied count; the exact lay, wall thickness, filler and material codes must be taken from the controlled product drawing.
| Layer / feature | Public family description | Engineering purpose | Release status |
|---|---|---|---|
| Fine-stranded copper | Public Semoflex Drum information describes fine-stranded bare copper, VDE 0295 class 6 or equivalent. | Reduces local bending stress and improves repeated-flex fatigue performance compared with coarser stranded conductors. | Family data |
| Semocore core insulation | Special insulation on a polyester basis; the technical concept is designed to slide over the fine-wire conductor bundle without bonding to it. | Allows controlled relative movement at the core surface and supports reduced wall thickness compared with older drum-cable concepts. | Family technical PDF |
| Core arrangement | Short-lay cores around a central filler or supporting element; exact 42-core lay is not supplied in the buyer string. | Controls pressure transfer and keeps the cable circular during winding. | Project drawing required |
| PUR inner support layer | A PUR support layer / inner sheath is part of the Semoflex Drum concept. | Supports the bundle and provides a controlled sliding interface under the outer reinforcement. | Family technical PDF |
| Textile support braid | Textile braid between inner and outer sheath layers provides cross-stability and torsion strength. | Distributes axial and torsional stress. It is not metallic armour and must not be used as a lifting sling. | Family technical PDF |
| PUR outer sheath | Special PUR outer jacket described as flame-retardant, halogen-free and mechanically resistant in public family information. | Protects against abrasion, tear, oil and outdoor mechanical contact; exact compound and colour are quotation-controlled. | Family data / project confirmation |
| Green-yellow earth conductor | G identifies a green-yellow earth conductor in the public catalogue convention. | Maintains protective continuity; the fault-current path and termination must be verified separately. | Catalogue convention |
The sliding interface reduces the tendency of the insulation to lock onto the fine-wire bundle. That matters when the core is repeatedly curved and released.
A tough sheath cannot compensate for a small reel, reverse twist, an S-shaped level change or a guide that pinches the cable.
Mechanical reinforcement should spread stress through the cable body. It does not make the cable a certified lifting or suspension member.
5. Exact public catalogue data for the supplied size
The public Baude catalogue lists both a conventional 42 G 2.5 row and a bundle-stranded 42 G 2.5 Bd row. Because the supplied procurement phrase omits Bd, the first row is the primary reading and the second is shown only as a controlled comparison.
| Catalogue row | Core count / section | CU number (kg/km) | Approx. OD (mm) | Approx. weight (kg/km) | Tensile load (N) | Interpretation |
|---|---|---|---|---|---|---|
| 42 G 2.5 | 42 G × 2.5 mm² | 1,040.0 | 31.4 | 1,511 | 2,625 | Primary row — matches supplied text without Bd |
| 42 G 2.5 Bd | 42 G × 2.5 mm², bundle-stranded | 1,040.0 | 33.5 | 1,848 | 3,675 | Comparator — use only if Bd is confirmed |
Primary catalogue mass: 1,511 kg/km ÷ 1,000 = 1.511 kg/m.
Primary reel-operation radius for D > 20 mm: 6 × 31.4 mm ≈ 188.4 mm.
Bd comparison radius for D > 20 mm: 6 × 33.5 mm ≈ 201.0 mm.
Supplied logistics volume: 1.20 m × 0.80 m × 1.55 m ≈ 1.488 m³.
These calculations are screening values; the controlled drawing, drum and method statement govern the final installation.
6. 42 G 2.5 versus 42 G 2.5 Bd: the comparison that matters in procurement
| Decision field | 42 G 2.5 — primary reading | 42 G 2.5 Bd — only if confirmed | Why the difference matters |
|---|---|---|---|
| Catalogue suffix | Not stated in supplied text. | Bd stated explicitly in catalogue row. | A suffix can represent a different lay / bundle construction, not a cosmetic marking. |
| Approx. OD | 31.4 mm | 33.5 mm | Affects minimum radius, gland selection, guide clearance, drum fill and layer pressure. |
| Approx. mass | 1,511 kg/km | 1,848 kg/km | Affects motor torque, acceleration, support load, shipping mass and vertical tension. |
| Tensile row | 2,625 N | 3,675 N | The value must match the actual construction and cannot be borrowed for a different row. |
| Supply condition | Use as target until purchaser confirms otherwise. | Use only after written confirmation and drawing match. | Prevents a quotation from silently changing the customer’s mechanical duty. |
7. Reel mechanics and installation envelope
Figure 2 — Reel path and mechanical controls. The derived radius uses the public Semoflex Drum guidance for cable diameters over 20 mm; it is not a replacement for the actual reel manufacturer’s drum drawing.
| Mechanical control | Public guidance / derived value | Project release requirement |
|---|---|---|
| Reel operation | 6 × D for a cable over 20 mm; primary row ≈ 188 mm minimum bending radius by the cited family guidance. | Confirm whether the stated value is a radius to the cable centreline, an installation minimum or a machine-specific barrel requirement. |
| Roller deviation | 7.5 × D; primary row ≈ 236 mm derived from 31.4 mm. | Release roller diameter, spacing, side-flange clearance, fleet angle and pressure distribution. |
| S-shaped level change | Minimum spacing 20 × D; primary row ≈ 628 mm derived from 31.4 mm. | Avoid S-shaped redirection where possible; otherwise confirm the full three-dimensional guide path. |
| Pay-out direction | Official installation guidance: unwind from a rotating drum and from the top. | Method statement, drum orientation, brake setting and operator inspection. |
| Spare turns | Keep two cable turns on the operating drum as a safety reserve. | Set the travel limit and verify the reserve at commissioning. |
| Torsion | Reeling cables are not designed for uncontrolled torsional loading; remove twist before installation and prevent twist accumulation. | Measure or control twist, especially in vertical, long-travel or changing-plane applications. |
| Support grip | Use an appropriate cable support grip for stationary fixing and long axial runs; do not transfer pulling force into the core termination. | Release grip type, length, clamping method, termination strain relief and inspection interval. |
8. Logistics and packing envelope: 120 × 80 × 155 cm
Figure 3 — The supplied 120 × 80 × 155 cm dimension treated as a logistics envelope. Confirm whether it is a packed reel, crate, pallet or transport dimension before calculating freight or storage.
| Logistics field | Supplied / derived reading | What procurement should request |
|---|---|---|
| External dimensions | 120 × 80 × 155 cm exactly as supplied. | Packing list or photo showing length, width and height orientation. |
| Planning volume | Approximately 1.488 m³, derived from the supplied dimensions. | Confirm whether packaging voids, pallet feet, flange protrusions or protective frame are included. |
| Net cable mass | Primary row catalogue mass is approximately 1.511 kg/m; total cable mass needs the ordered length. | Ordered length, net cable mass, gross reel mass and drum tare. |
| Reel geometry | Not supplied by the phrase 120 × 80 × 155 cm. | Barrel diameter, flange diameter, width, layer count, shaft bore and cable-entry position. |
| Shipping constraint | Use 120 × 80 × 155 cm for preliminary freight planning only. | Final packing drawing, centre of gravity, lifting points and transport orientation. |
9. Dynamic failure physics: what to watch in service
| Failure mechanism | Physical cause | Inspection / design control |
|---|---|---|
| Copper strand fatigue | Repeated curvature, small radius, sharp guide contact or a locked core insulation interface. | Maintain the released radius, use correct lay and inspect for increased resistance or intermittent open circuits. |
| Core migration | Incorrect lay, insufficient support or excessive layer pressure causes the core bundle to move inside the sheath. | Check the construction drawing, reel fill, layer pressure and cable tracking. |
| PUR sheath wear | Abrasive guide contact, flange rubbing, contamination, cuts or local pinch points. | Use smooth guides, correct fleet angle and regular visual inspection; do not wait for conductor exposure. |
| Torsion lock | The cable is installed with a twist or is forced through a changing plane. | Pay out from the top, remove twist, use drall-free installation and control the guide path. |
| Termination pull-out | Cable mass, acceleration or drum force is transferred into the electrical termination. | Use support grips and independent strain relief; verify the first and last metres after commissioning. |
| Thermal overload | Current, ambient temperature, grouped layers and heat trapped on a drum exceed the conductor’s thermal design. | Calculate current capacity for the actual duty cycle and winding layers; never use a fixed-installation rating automatically. |
Rmin = k × D
Ftotal ≈ Fcable mass + Facceleration + Ffriction + Fslope + Fguide + Ftermination
Vlogistics = 1.20 × 0.80 × 1.55 ≈ 1.488 m³
The equations screen the order. The released cable data, reel geometry and project safety factors govern the final calculation.
10. Application scenarios
Figure 4 — Typical motorised-reel and high-mechanical-stress environments. The final use must be checked against voltage, current, environment, travel and reel geometry.
Use where the cable is repeatedly taken up and paid out and where abrasion, outdoor exposure and mechanical impact are more severe than a fixed control-cable installation.
Check water, dust, oil, cold temperature, shock loading, cable support and fault-current requirements before selecting a low-voltage PUR construction.
Confirm whether the motion is drum reeling, festoon, drag chain or a hybrid. The same 42-core cable is not automatically suitable for every movement mode.
Release barrel diameter, line speed, acceleration, layer count, reserve turns and end restraint together with the cable quotation.
11. Installation and commissioning controls
| Control point | Practical instruction | Evidence |
|---|---|---|
| Cable identity | Photograph the cable print, reel label and original packing before opening. Record whether the marking says 42 G 2.5 or 42 G 2.5 Bd. | Traceable photo and document set. |
| Drum handling | Lift from the flange side with suitable transport equipment. Roll only where the installation instruction allows it. | Handling method statement. |
| Pay-out | Pay out from a rotating drum and from the top. Avoid uncontrolled loops, reverse twist and pulling the cable sideways off the flange. | Installation inspection record. |
| Support grip | Use a suitable cable support grip for fixed restraint; do not clamp the cable so tightly that the PUR sheath is damaged. | Grip specification and inspection. |
| Drum reserve | Keep two spare turns on the operating drum where required by the installation guidance. | Limit-setting and commissioning record. |
| Electrical tests | Perform conductor continuity/resistance, insulation resistance, PE continuity and the applicable 4 kV core-to-core test or project acceptance test. | Routine/acceptance test dossier. |
| First movement | Run slowly first. Observe tracking, flange contact, flat spots, noise, current, temperature and the first/last metres at the termination. | Commissioning report with photos. |
| Maintenance | Inspect PUR cuts, abrasion, swelling, hardening, crushing, twist marks, support-grip migration and changes in conductor resistance. | Periodic inspection plan and replacement criteria. |
12. Feichun functional-equivalent manufacturing
Feichun Cable can develop and manufacture a functional-equivalent PUR drum/reeling cable for the required service, using an independent Feichun construction drawing rather than copying a third-party marking or proprietary drawing. For this target, the design basis is the supplied 42 G 2.5 configuration, the confirmed use of a green-yellow protective earth conductor, the selected reel duty and the confirmed 120 × 80 × 155 cm logistics envelope.
| Feichun engineering action | Customer deliverable | Why it matters |
|---|---|---|
| Configuration lock | Confirm 42 G 2.5 versus 42 G 2.5 Bd before quotation. | Prevents a mismatch between OD, mass, tensile load, reel fill and termination. |
| Independent construction | Feichun product code, core lay, conductor class, insulation, filler, inner support, braid, outer PUR and colour/marking plan. | Creates a controlled product instead of a visual copy. |
| Mechanical equivalence | OD, mass, tensile load, radius by movement mode, speed, acceleration, torsion, cycles and reel geometry. | Connects cable performance to the actual machine. |
| Electrical equivalence | 0.6/1 kV rating, resistance, insulation resistance, test voltage, PE continuity and applicable flame/oil tests. | Makes the replacement measurable and auditable. |
| Logistics release | Packing drawing matching 120 × 80 × 155 cm, gross/net mass, reel identification and lifting instructions. | Separates transport data from cable electrical data. |
| Patent and marking discipline | Neutral Feichun marking and buyer-side legal-review package where needed. | A functional equivalent can avoid copying third-party marks and drawings, but no supplier should guarantee zero patent risk without an FTO review. |
13. Certification and documentation advantage
Engineered for maximum safety in demanding environments, our cable systems comply with global standards including ATEX, IECEx, VDE, CE, UKCA, EAC, and the Russian Fire Safety Certificate. They are the trusted choice for heavy-duty mining equipment, ship-to-shore cranes, RTG/RMG cranes, and conveyor systems where high reliability is non-negotiable.
For a low-voltage PUR drum cable, the useful advantage is not a generic list of logos. Feichun’s certification advantage is the ability to prepare a product-specific technical dossier around the actual conductor class, PUR compound, flame/oil/UV requirements, reel duty, destination market and shipment batch. The exact certificate or declaration must always match the ordered construction and applicable legislation.
| Document / approval route | Potential relevance | Scope rule |
|---|---|---|
| ATEX | Relevant where the complete equipment or installation is located in a defined explosive atmosphere. | Confirm zone, category, temperature class and whether the certificate covers the cable or the completed assembly. |
| IECEx | International explosive-atmosphere conformity route where applicable. | Match the certificate scope, marking, cable construction and destination. |
| VDE / IEC | Supports conductor, installation and test frameworks such as IEC 60228 and applicable VDE rules. | A standard reference is not automatically a certificate for a different Feichun construction. |
| CE / UKCA | Market access for applicable product legislation. | Issue the correct declaration and technical file for the ordered cable and market. |
| EAC | Potential Eurasian Economic Union market requirement. | Confirm current regulation, product scope and conformity route. |
| Russian Fire Safety Certificate | Fire-safety evidence where the project requires it. | Confirm validity, construction, classification and destination before quotation. |
| UL / CSA / CUL | Public Semoflex Drum references mention UL/CSA/CUL approval routes. | Verify the current certificate and style number for the exact 42 G 2.5 construction; do not copy an outdated or inconsistent public style reference. |
14. RFQ release checklist
Figure 5 — RFQ flow for converting the supplied product phrase into a controlled Feichun quotation.
| RFQ field | Required answer | Status in supplied request |
|---|---|---|
| Original procurement string | 42 G 2.5MM2 SEMOFLEX DRUM PUR REELING DRUM CABLE SIZE 120X80X155 CM | Supplied |
| Normalized target | Semoflex Drum 0.6/1 kV — 42 G 2.5 mm² PUR drum/reeling cable — supplied logistics size 120 × 80 × 155 cm | Derived normalization |
| Exact catalogue row | 42 G 2.5 primary; confirm whether 42 G 2.5 Bd is intended. | Critical confirmation |
| Nominal voltage | 0.6/1 kV Semoflex Drum family reference; confirm the ordered cable’s marking and test file. | Family source; order TBC |
| Conductor | 42 × 2.5 mm²; confirm class 6, material, resistance and core identification. | Size supplied; construction TBC |
| Outer diameter | 31.4 mm primary row; 33.5 mm only if Bd is confirmed. | Catalogue comparison |
| Mass | 1,511 kg/km primary row; 1,848 kg/km only if Bd is confirmed. | Catalogue comparison |
| Tensile load | 2,625 N primary row; 3,675 N only if Bd is confirmed. | Catalogue comparison |
| Logistics size | 120 × 80 × 155 cm; confirm whether package, pallet, crate or reel dimensions. | Supplied; meaning TBC |
| Reel duty | Barrel/flange, layers, speed, acceleration, travel, cycles, guide layout and torsion. | Not supplied |
| Environment | Dry/wet, oil, UV, ozone, dust, cold, impact, explosive-area classification and fire requirements. | Not supplied |
| Tests and documents | Routine electrical tests, PE continuity, insulation resistance, flame/oil evidence, dynamic test plan, certificate/declaration and packing list. | Required |
15. Source audit and release note
- Baude product catalogue, Semoflex Drum page: public exact rows for 42 G 2.5 and 42 G 2.5 Bd; use the catalogue page as a row-level reference, not as the final commercial offer.
- Baude Semoflex Drum technical application: construction concept, Semocore, textile braid, PUR layers and radius guidance.
- Baude Semoflex Drum installation instructions: drum handling, top-side pay-out, two spare turns, support grips and S-shaped guide spacing.
- Baude official reeling-cables page: family application context.
- Public Semoflex Drum product summary: supplementary family details for temperature, test voltage, insulation resistance and environmental performance.
- IEC 60228 and IEC 60332-1-2: conductor and flame-test context.


