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Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Grounding & Bonding
- Product Type:
- E-Z-Ground Compression Grounding
- Selling Unit Of Measure:
- each
- Standards:
- UL E3060
- Type2:
- Grounding devices or assemblies
- Department:
- Electrical
- Product Subgroup:
- Grounding Devices
Blackburn CC40C-56R – Frequently Asked Questions
1) Will the Blackburn CC40C-56R ground clamp fit a 5/8 inch ground rod, or do I need a different clamp for 3/4 inch?
One clamp covers both. The CC40C-56R is built for either a 5/8 inch or a 3/4 inch ground rod, so crews doing a mix of residential 5/8 rods and heavier 3/4 rods can carry a single part number instead of two.
2) What size grounding electrode conductor does the Blackburn CC40C-56R take?
It is rated up to 4/0 conductor, which is the size range you need for large service grounding electrode conductors on commercial and multi-family services. If your grounding conductor is smaller, it still lands in the same clamp body; 4/0 is the top of the range, not a requirement.
3) Is the Blackburn CC40C-56R ground clamp UL listed for an inspection?
It carries UL file E3060, which is the listing reference an inspector or plan reviewer will look for on a grounding electrode connector. That matters on direct-burial rod connections where the AHJ wants a listed clamp rather than a field-improvised connection.
4) Is this Blackburn grounding clamp copper, and can I use it on a copper-clad ground rod with copper conductor?
The CC40C-56R is a copper-bodied clamp, so it pairs with copper conductor on a copper-bonded ground rod without creating a dissimilar-metal connection at the electrode. Copper clamps are the normal choice for direct-burial grounding electrode connections where the conductor is bare copper.
5) What size wrench or socket do I need to tighten the Blackburn CC40C-56R ground clamp?
The clamp uses a 3/8 inch bolt, so a standard 3/8 hex bolt head drives it. It is a bolted mechanical clamp, not a crimp, so no compression tooling or die set is required to make the connection.
6) Where is the Blackburn CC40C-56R ground clamp made? I have a domestic-content requirement.
Country of origin is Mexico. If your project carries a Buy American or domestic-preference clause on electrical materials, this clamp will not satisfy it and you will need a US-origin grounding connector instead.
7) Can I use this clamp to bond to water pipe or building steel, or is it only for ground rods?
The CC40C-56R is a rod clamp, sized around 5/8 and 3/4 inch electrodes. For bonding to a water pipe or to structural steel you want a pipe ground clamp or a lay-in lug sized to that surface instead; forcing a rod clamp onto pipe does not give a listed connection.
8) Is the Blackburn CC40C-56R sold individually or in a box of clamps?
Sold each. For a service upgrade you generally need one clamp per rod-to-conductor connection, so count your electrodes and order to match rather than assuming a multi-pack quantity.
How fast can I get the Blackburn CC40C-56R 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 CC40C-56R come with a warranty?
Absolutely. The Blackburn CC40C-56R 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 CC40C-56R?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Blackburn CC40C-56R from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
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every order.
Our team is always ready to help you choose the right product for your project.