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The ERICO HAMMERLOCK irreversible grounding connector mechanically connects the grounding conductor to the ground rod. Machined from highly conductive copper, the state-of-the-art ERICO HAMMERLOCK provides a low resistance connection designed to withstand ground fault currents and lightning transients. The connector’s mechanically rugged design will help ensure that the highest level of performance is maintained for many years after the connection has been buried in the harsh underground environment.

Installing the ERICO HAMMERLOCK is as easy as swinging a hammer and requires no special tools or training. The ERICO HAMMERLOCK can be installed three to five times faster than an acorn clamp and provides a high-quality grounding connection that is easy to use and withstands 100% of the current carrying capacity of the conductor.


  • Irreversible connection with excellent mechanical strength
  • Fast and simple installation requires only a hammer
  • No special training required
  • Low resistance connection
  • Provides a visual indication of completed connection
  • Allows for “T” or pass-through connections


Part Number EHL12FC1V
Ground Rod Type Copper-bonded
Material Copper
Ground Rod Diameter, Nominal 1/2"
Ground Rod Diameter, Actual (Ø) 0.5"
Conductor Size #4 Stranded - #2 Stranded
25 mm² Stranded
Number of Conductors 1
Certifications cULus
Standard Packaging Quantity 25 pc
UPC 78285647078
EAN-13 8711893040432

Pentair, CADDY, CADWELD, CRITEC, ERICO, ERIFLEX, ERITECH and LENTON are owned by Pentair or its global affiliates. All other trademarks are the property of their respective owners. Pentair reserves the right to change specifications without prior notice.

UL, UR, cUL, cUR, cULus and cURus are registered certification marks of UL LLC.