Grounding Products.
Ground rods, clamps, conductors, and exothermic, compression, and mechanical connectors that bond equipment and structures to a low-impedance earth-return path — substation grounding to IEEE 80 and IEEE 837, listed to UL 467, for utility, industrial, data center, and renewable systems.
- Standards
- IEEE 80 / 837
- Manufacturers
- 3
- Listing
- UL 467
Standards & listings.
Grounding connections in a substation ground grid are qualified to IEEE 837 and applied within the safety framework of IEEE 80. Grounding and bonding equipment is independently listed to UL 467.
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IEEE 80-2013
The guide for safety in AC substation grounding — sets safe touch and step potential limits during fault conditions and the design procedures for evaluating a grounding system. Primarily concerned with outdoor AC substations across distribution, transmission, and generating-plant grounding.
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IEEE 837-2014
The standard for qualifying permanent connections used in substation grounding — the mechanical, current-temperature cycling, freeze-thaw, corrosion, and fault-current tests a permanent grounding connection must pass within the grid, joining ground leads to the grid, and joining ground leads to equipment and structures.
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UL 467
Grounding and bonding equipment — the safety listing for grounding rods, clamps, connectors, and related hardware used to establish the equipment grounding system.
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NEC Article 250 / 270
Grounding and bonding for premises wiring. Article 250 covers installations not over 1000 V; the 2026 NEC relocates over-1000 V grounding and bonding to the new Article 270. Substation grid connections are additionally qualified under IEEE 80 and IEEE 837.
Connection methods.
Exothermic
A molten-metal reaction fuses the conductors into a permanent, fully bonded connection with no mechanical contact interface — the lowest-resistance, longest-life option for buried grid conductors and rod connections.
Compression
Irreversible compression connectors are crimped with a die tool to form a permanent, inspectable joint. They give a repeatable, tool-verified connection for ground leads, lugs, and conductor runs.
Mechanical
Bolted and set-screw clamps and connectors apply pressure to the conductor and can be disassembled for inspection or rework — used for ground-rod clamps, equipment bonding, and removable connections.
FAQ.
What are grounding products?
Grounding products are the connectors, conductors, ground rods, clamps, and straps used to bond electrical equipment and structures to a low-impedance earth-return path for fault and lightning current.
They establish the equipment grounding and earth-return system that limits touch and step potential, clears faults, and dissipates lightning and switching surges.
What standards govern grounding and bonding?
Permanent connections used in substation grounding are qualified to IEEE 837, the standard for qualifying permanent connections used in substation grounding. Connections that pass IEEE 837 satisfy the connection criteria of IEEE 80, the guide for safety in AC substation grounding.
Grounding and bonding equipment is listed to UL 467. For premises wiring, NEC Article 250 covers grounding and bonding of installations not over 1000 V; the 2026 NEC relocates over-1000 V grounding and bonding to Article 270.
What is the difference between exothermic, compression, and mechanical grounding connections?
An exothermic weld fuses the conductors with a molten-metal reaction to form a permanent, fully bonded connection with no contact interface.
An irreversible compression connector is crimped with a die tool to form a permanent, inspectable joint. A mechanical connector uses bolted or set-screw pressure and can be disassembled for inspection or rework.
Are grounding connectors voltage-rated?
No. Grounding products are not assigned a medium-voltage class. They are specified by conductor and rod size range, material, connection method, and applicable listings rather than by a kV rating.
What materials are grounding products made from?
Grounding connectors, clamps, and straps are commonly made of copper or bronze for conductivity and corrosion resistance. The correct material and plating depend on the connected metals and the burial or exposure environment.
Material, plating, and listing also determine whether a product is suitable for direct burial in earth or concrete.
Which manufacturers does Hawk carry for grounding products?
Hawk carries grounding products from Burndy, 3M, Raychem, and Richards.
Does Hawk publish grounding pricing or lead times?
No. Grounding products are configured and priced per project.
Send the conductor and rod size range, connection method, material, and burial environment through Contact, and pricing and availability are confirmed once those are defined.
Sourcing grounding products?
Send the conductor and rod size range, connection method, material, and burial or exposure environment — Hawk MV Supply will fill in the rest.
Grounding products for substation, utility, and industrial earth-return systems.
Hawk MV Supply sources grounding products across the connection methods used to bond electrical equipment and structures to a low-impedance earth-return path — ground rods, clamps, conductors, straps, lugs, and exothermic, irreversible compression, and mechanical connectors. A grounding system provides the route for fault and lightning current that limits touch and step potential, clears faults, and dissipates lightning and switching surges to protect personnel and equipment. Permanent connections used in a substation ground grid are qualified to IEEE 837, and those connections satisfy the connection criteria of IEEE 80, the guide for safety in AC substation grounding. Grounding and bonding equipment is listed to UL 467, and premises grounding and bonding follows NEC Article 250 for installations not over 1000 V, with over-1000 V requirements relocated to Article 270 in the 2026 NEC. A grounding product is specified by product type, connection method, conductor or rod size range, and base material; exact values are confirmed per project.
Grounding products are installed wherever equipment must be bonded to earth — utility substations and distribution networks, industrial plants, data centers, commercial buildings, and renewable generation sites. Hawk carries grounding products from Burndy, 3M, and Raychem. Brand names and logos are the property of their respective owners; specifications shown are typical industry ranges, with product availability and exact values confirmed at quote.