COPPER BONDED WIRES

Copper bonded down conductor wires with steel or aluminium core. Cost-effective alternative to solid copper wires for lightning protection down conductors and earthing systems. Available in copper-steel bonded and copper-clad aluminium variants. NFC 17-102, IEC 62305 and EN 50164 compliant.

Wire Types

2 Types

Steel bonded & Al bonded

Core Options

Steel / Al

Copper clad bonded

Variants

12+

Reference codes available

Standard

IEC 62305

NFC 17-102 · EN 50164

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Manufacturer direct — no intermediaries. Ships from Izmir, Turkey worldwide.

Copper bonded wires combine a steel or aluminium core with an outer copper bonding layer. They provide the conductivity and corrosion resistance of copper at significantly lower cost and weight than solid copper conductors. Copper-steel bonded wires are the standard choice for down conductor applications; copper-clad aluminium offers a lighter-weight option where weight is a consideration.

All variants are available in multiple cross-sections to meet IEC 62305-3 minimum requirements for down conductors. The copper bonding layer is applied by electrolytic process ensuring consistent coverage and adhesion throughout the conductor length.

Copper-Steel Bonded Wires

Steel / Copper

Reference	Dimensions (mm)	Material	Weight/m (kg)
OLT-230D	7 × 1000 × 7	Steel / Copper	0.30
OLT-231D	8 × 1000 × 8	Steel / Copper	0.47
OLT-232D	10 × 1000 × 10	Steel / Copper	0.60
OLT-233D	13 × 1000 × 13	Steel / Copper	0.95
OLT-234D	7 × 1000 × 7	Steel / Copper	0.34
OLT-235D	8 × 1000 × 8	Steel / Copper	0.43

Copper-Clad Aluminium Bonded Wires

Copper / Aluminium — lightweight

Reference	Dimensions (mm)	Material	Weight/m (kg)
OLT-236D	7 × 1000 × 7	Copper / Aluminium	0.17
OLT-237D	8 × 1000 × 8	Copper / Aluminium	0.21
OLT-238D	10 × 1000 × 10	Copper / Aluminium	0.27
OLT-239D	13 × 1000 × 13	Copper / Aluminium	0.43
OLT-241D	7 × 1000 × 7	Copper / Aluminium	0.15
OLT-242D	8 × 1000 × 8	Copper / Aluminium	0.19

Custom cross-sections available on request. Weights shown per 1000mm.

Material & Construction
Core Options	High-strength steel (bonded) or aluminium (clad)
Copper Layer	Electrolytic copper bonding — uniform coverage
Advantage vs Solid Copper	Lower cost, lighter weight — suitable for long down conductor runs
Performance
Copper Thickness	254µm — exceeds IEC 62561 minimum of 250µm
Conductivity	Suitable for down conductor applications per IEC 62305-3
Weight Advantage	Copper-clad aluminium is ~40% lighter than solid copper equivalent
Compliance & Standards
Primary Standards	NFC 17-102:2011 · IEC 62305-3
Component Standard	EN 50164-2 · IEC 62561
CE Marking	Yes
Applications
Primary Use	Earth termination system for lightning protection systems
Advantage vs Solid Copper	Lower cost, higher mechanical strength — suitable for hard and rocky soils
Soil Suitability	All soil types — use with ORBetter® in high-resistivity soils

Down Conductor Routing

Route as vertically as possible — avoid horizontal runs exceeding 0.5m. Fix to the structure at maximum 1m intervals using copper-compatible saddles and fixings. Minimum bend radius 200mm to avoid inductance increases at bends.

Cut End Protection

If a rod must be cut to length, apply a corrosion-resistant compound to the cut end to seal the exposed steel core. The threaded ends are protected by the thread profile itself, but cut ends are vulnerable to accelerated corrosion if left unprotected in aggressive soils.

Earthing Resistance Target

Install a disconnecting test joint at approximately 0.5m above ground level on each down conductor. Protect the lower 2m with a mechanical guard tube where exposed near ground level. Connect to the earth electrode using an appropriate exothermic weld or listed mechanical connector.