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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 3905BU – Frequently Asked Questions
1) What pipe size does the Blackburn 3905BU water pipe ground clamp fit?
The 3905BU is sized for 4 to 5 inch water pipe. If your service entrance pipe falls outside that range, you need a different clamp size in the series, since a water pipe clamp only bonds reliably when the saddle seats fully on the pipe diameter it was cut for.
2) Can this ground clamp be buried in the earth or used in a concrete-encased electrode?
Yes, the 3905BU is a direct burial rated water pipe ground clamp, so it can go underground on a buried metallic water service rather than only in an accessible indoor location. The bronze body is what makes that possible, since it resists corrosion in soil contact.
3) What is the 3905BU made of, and will it corrode on a copper water line?
Bronze construction throughout. Bronze against copper pipe is the standard pairing for a grounding electrode connection because the two metals are close enough electrochemically to avoid the galvanic attack you would get from, say, aluminum hardware on copper.
4) Does this clamp come insulated or with any coating over the conductor connection?
No, it is a non-insulated clamp. Bare metal to bare pipe is what you want on a grounding electrode connection, but it also means the pipe surface has to be cleaned down to bright metal before you set the clamp, and the connection must stay accessible unless it is a direct burial application.
5) Is the 3905BU sold individually or in a box?
Each. One clamp per order unit, so for a multi-building or multi-service job you order by the piece rather than by carton.
6) Is the Blackburn 3905BU made in the USA?
Country of origin is the United States, which matters if you are buying under a domestic-content requirement on a government, school, or federally funded project.
How fast can I get the Blackburn 3905BU 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 3905BU come with a warranty?
Absolutely. The Blackburn 3905BU 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 3905BU?
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 3905BU from ZenSupply?
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and
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every order.
Our team is always ready to help you choose the right product for your project.