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FIG 8 CONN 1IN GRD ROD 4/0-250
Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Material Of Conductor:
- Copper
- Product Group:
- Grounding & Bonding
- Product Type:
- E-Z-Ground Compression Grounding
- Selling Unit Of Measure:
- each
- Standards:
- UL E3060, CSA 0884
- Type2:
- Grounding devices or assemblies
- Department:
- Electrical
- Product Subgroup:
- Grounding Devices
Blackburn GR1-40250 – Frequently Asked Questions
1) Does the Blackburn GR1-40250 need a crimp tool, or can it be installed with a wrench?
It's a compression fitting, not a mechanical clamp. The GR1-40250 has to be crimped with a hydraulic or battery compression tool and the correct die for the connector; there are no set screws or bolts to torque. If you want a bolted connection you can back off and reuse, look at a mechanical ground rod clamp instead.
2) Is the Blackburn GR1-40250 UL listed for grounding?
Yes. The connector carries UL E3060 and CSA 0884, which is what an inspector will look for on a grounding electrode connection.
3) Is the GR1-40250 grounding connector copper, and can I use it with aluminum conductor?
Conductor material on the GR1-40250 is copper. Use it on copper grounding electrode conductor and copper-bonded rod. Don't put aluminum conductor into a copper-only compression connector.
4) What does the figure-8 shape on the GR1-40250 mean for how it's installed?
Figure-8 means two separate barrels, one over the 1 inch ground rod and one over the 4/0 to 250 kcmil conductor, crimped as a single connection. The conductor runs parallel alongside the rod rather than wrapping it, so plan the trench and the slack accordingly.
5) Can the GR1-40250 be direct buried at a ground rod?
Yes. Compression grounding connectors of this type are made for permanent, direct-buried electrode connections, and the copper-to-copper crimped joint has nothing to loosen over time the way a bolted clamp can. That's the main reason specs call for compression over mechanical on buried rods.
6) Is the GR1-40250 sold individually or in a box?
Selling unit is each, so you order one connector per grounding electrode connection. Order to your rod count, and add spares for any that get crimped badly.
7) Where is the Blackburn GR1-40250 made?
Country of origin on the GR1-40250 is the United States, which matters if you're on a job with domestic sourcing requirements.
How fast can I get the Blackburn GR1-40250 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Blackburn GR1-40250 come with a warranty?
Absolutely. The Blackburn GR1-40250 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Blackburn GR1-40250?
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installation tips, and troubleshooting. Contact Us
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