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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Insulation Material:
- Non-Insulated
- Material Of Conductor:
- Bronze
- Product Group:
- Grounding & Bonding
- Product Type:
- Ground Clamp
- Selling Unit Of Measure:
- each
- Standards:
- UL E3060
- Type2:
- Grounding devices or assemblies
- Department:
- Electrical
- Product Subgroup:
- Ground Clamps
Blackburn 3904BU – Frequently Asked Questions
1) What does "direct burial" mean on the Blackburn 3904BU, and can I use it underground?
The 3904BU is rated for direct burial, so it can be installed on buried water pipe or in a below-grade location such as a service entrance where the pipe enters the building underground. Bronze construction is what supports that use. Clamps not marked for direct burial have to stay accessible above grade.
2) Can I use a water pipe ground clamp like the 3904BU on a ground rod instead?
No. The 3904BU is a water pipe clamp built for 2.5 to 3.5 inch pipe; a 1/2 or 5/8 inch ground rod needs an acorn-style rod clamp or a rod-rated direct burial clamp. Using a pipe clamp on a rod gives you a connection that will not seat properly and will not pass inspection.
3) What is the Blackburn part number and where is this ground clamp made?
Manufacturer part number is 3904BU, made in the United States. Useful if you are matching a spec that calls out a domestic-origin grounding component.
4) Is the Blackburn 3904BU sold individually or in a box?
It is sold each, so one clamp per unit ordered. If you are bonding both the cold water line and a separate ground rod on a service, count the connections and order accordingly.
How fast can I get the Blackburn 3904BU 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 3904BU come with a warranty?
Absolutely. The Blackburn 3904BU 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 3904BU?
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 3904BU from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.