Earthing Clamps Clamps by ORBITAL

NFC 17-102 IEC 62305 EN 50164 CE Certified Multiple Materials

Earthing & Bonding

CLAMPS

Mechanical clamps for connecting down conductors — tapes, cables and wires — to each other and to earth rods in lightning protection earthing systems. Multiple configurations for all connection types: tape-to-tape, cable-to-cable, tape-and-cable combined, T-junction, rod-to-tape and rod-to-cable. Available in gunmetal, copper, stainless steel, aluminium, naval brass and galvanized steel.

Clamp Types

7 Types

Tape, cable, rod variants

Materials

GM · Cu · SS

Gunmetal, copper, SS, Al, GS

Variants

40+

Reference codes available

Standard

IEC 62305

NFC 17-102 · EN 50164

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

ORBITAL clamps provide the mechanical and electrical connections between all conductors in a lightning protection earthing system. Selecting the correct clamp type, size and material is critical — a poorly selected or installed clamp joint is one of the most common sources of increased earthing resistance over time. Match clamp material to the conductor materials being joined to prevent galvanic corrosion at the joint.

The range covers all standard connection types: square clamps for tape-to-structure and cable-to-structure, T clamps for inline conductor joints, multipurpose clamps for mixed tape/cable connections, and rod clamps for connecting conductors to driven earth rods. Gunmetal is the standard specification for copper conductor systems; stainless steel for stainless systems; aluminium for aluminium conductors.

Square Tape Clamp

Tape-to-structure connection

Reference	Dimensions (mm)	Material	Tape Min (mm)	Tape Max (mm)	Weight (kg)
OLT-026F	60×60×30	Galvanized Steel	30×2	30×3.5	0.33
OLT-029F	50×50×20	Copper	30×2	30×3.5	0.15
OLT-033F	55×55×15	Gunmetal	25×3	25×3	0.23
OLT-034F	55×55×20	Gunmetal	25×6	25×6	0.42
OLT-035F	85×85×25	Gunmetal	50×6	50×6	0.98
OLT-039F	55×55×15	Aluminium	25×3	25×3	0.07
OLT-131F	60×60×30	Stainless Steel	30×2	30×3.5	0.32

Square Cable Clamp

Cable-to-structure connection

Reference	Dimensions (mm)	Material	Cable Ø Min (mm)	Cable Ø Max (mm)	Weight (kg)
OLT-023F	60×60×19	Galvanized Steel	8.0	10.0	0.33
OLT-028F	60×60×21	Stainless Steel	8.0	10.0	0.24
OLT-032F	60×60×22	Copper	8.0	10.0	0.26
OLT-036F	60×60×40	Gunmetal	8.0	8.0	0.32
OLT-037F	50×50×30	Gunmetal	10.0	10.0	0.26
OLT-038F	60×60×40	Gunmetal	13.0	13.0	0.25
OLT-089J-1	50×50×45	Naval Brass	8.0	15.0	0.25
OLT-136J	61×61×33	Galvanized Steel	8.0	16.0	0.26
OLT-137J	60×60×32	Stainless Steel	8.0	16.0	0.25
OLT-138J	60×60×30	Copper	8.0	16.0	0.27

Square Tape and Cable Clamp

Tape + cable combined connection

Reference	Dimensions (mm)	Material	Cable Ø Min	Cable Ø Max	Tape Min	Tape Max	Weight (kg)
OLT-015J	60×60×19	Galvanized Steel	—	—	—	—	0.33
OLT-016J	60×60×19	Stainless Steel	—	—	—	—	0.33
OLT-017J	60×60×19	Copper	—	—	—	—	0.33
OLT-020F	55×55×40	Naval Brass	7.0	13.0	30×2	30×3.5	0.28
OLT-031F	60×60×30	Galvanized Steel	8.0	10.0	30×2	30×3.5	0.24
OLT-133F	60×60×30	Copper	8.0	10.0	30×2	30×3.5	0.31
OLT-134F	57×57×25	Aluminium	7.0	13.0	30×2	30×3.5	0.12
OLT-136F	60×60×30	Stainless Steel	8.0	10.0	30×2	30×3.5	0.30

T Clamp

Inline T-junction

Reference	Dimensions (mm)	Material	Cable Ø Min (mm)	Cable Ø Max (mm)	Weight (kg)
OLT-012F	40×50×33	Naval Brass	8.0	10.0	0.09
OLT-119F	40×45×35	Gunmetal	8.0	8.0	0.15
OLT-120F	26×50×40	Galvanized Steel	8.0	8.0	0.13

Multipurpose Clamp

Wide range tape + cable

Reference	Dimensions (mm)	Material	Cable Ø Min	Cable Ø Max	Tape Min	Tape Max	Weight (kg)
OLT-090H	41×74×43	Naval Brass	8.0	19.0	30×2	30×3.5	0.24

Rod to Tape A Clamp

Connects rod to flat tape at surface

Reference	Dimensions (mm)	Material	Cable Ø Min	Cable Ø Max	Tape Min	Tape Max	Weight (kg)
OLT-080J	37×54×20	Gunmetal	12.0	20.0	25×3	26×12	0.12
OLT-081J	51×44×22	Gunmetal	16.0	20.0	30×2	40×12	0.24
OLT-082J	70×55×20	Gunmetal	16.0	20.0	50×6	51×12	0.23

Rod to Cable G Clamp

Connects rod to cable at surface

Reference	Dimensions (mm)	Material	Cable Ø Min (mm)	Cable Ø Max (mm)	Weight (kg)
OLT-083J	20×45×29	Gunmetal	5.0	16.0	0.06
OLT-086J	30×55×30	Gunmetal	7.0	20.0	0.09
OLT-112J	30×60×23	Galvanized Steel	5.0	16.0	0.08

U-Bolt Rod E Clamp

Rod + tape combined — U-bolt type

Reference	Dimensions (mm)	Material	Cable Ø Min	Cable Ø Max	Tape Min	Tape Max	Weight (kg)
OLT-087J	60×65×25	Gunmetal	16.0	16.0	25×3	25×3	0.24
OLT-088J	55×65×25	Gunmetal	20.0	20.0	25×3	25×3	0.23

Select clamp material to match conductor material. Contact ORBITAL for compatibility guidance.

Material & Construction
Gunmetal	Standard for copper systems — high conductivity, corrosion resistant
Copper	Highest conductivity — for copper-only installations
Stainless Steel	Marine and aggressive environments — use with SS conductors
Aluminium	Lightweight — for aluminium conductor systems only
Performance
Copper Thickness	254µm — exceeds IEC 62561 minimum of 250µm
Galvanized Steel	Economical — for galvanized systems in non-aggressive soils
Naval Brass	High strength, corrosion resistant — for demanding applications
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

Material Matching

Always match clamp material to the conductor material being joined. Mixing copper with aluminium or galvanized steel at a clamp joint creates a galvanic cell — in the presence of moisture, the less noble metal will corrode. Gunmetal is compatible with copper; stainless steel with SS conductors; aluminium with aluminium only.

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

Verify electrical continuity across each clamp joint after installation. Apply anti-oxidant compound to conductor surfaces before clamping in exposed or buried locations to prevent oxidation at the contact interface. Buried clamp joints should be protected with a waterproof compound or tape.