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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Insulation Material:
- None
- 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 3909BU – Frequently Asked Questions
1) What size water pipe does the Blackburn 3909BU ground clamp fit?
The 3909BU is a water pipe ground clamp sized for 12 inch pipe. It is the direct burial style, so it is intended for the buried section of a metal water service where the grounding electrode conductor lands on the pipe. If your service main is a smaller diameter, you need a different clamp in the range; this one is built for 12 inch.
2) Can this Blackburn clamp be buried in earth or encased in concrete?
Yes. The 3909BU is the direct burial version, so it is made to stay in the ground on a buried metal water pipe rather than only in an accessible interior location. The current-carrying body is bronze, which is why it holds up in direct soil contact.
3) What is the Blackburn 3909BU made of, and will it corrode against copper water pipe?
The conducting body is bronze, a copper alloy, so it is compatible with copper and copper alloy water piping without the galvanic mismatch you would get from a dissimilar metal. There is no insulation on the clamp; it is a bare metal-to-metal connection by design.
4) Is this the right part for bonding a metal water service to the ground electrode system?
Yes, that is exactly its job. The 3909BU is a grounding device that clamps the grounding electrode conductor to a 12 inch metal water pipe, in the direct burial configuration for a buried run. It is not a pipe repair or bonding jumper fitting.
5) Do I get one clamp or a pack when I order the Blackburn 3909BU?
It sells each, one clamp per unit. If you are grounding several services or want spares on the truck, order the quantity you need individually.
6) Where is the Blackburn 3909BU ground clamp manufactured?
It is made in the United States, which matters on federal, municipal, and other domestic-preference jobs where the submittal has to show country of origin.
How fast can I get the Blackburn 3909BU 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 3909BU come with a warranty?
Absolutely. The Blackburn 3909BU 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 3909BU?
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 3909BU 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.