Blackburn Bronze Water Pipe Gr...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$351.41
$263.40
Blackburn 3904 WTR PIPE GRD CLMP, 4-4/0, 2.5-3.5

Blackburn Bronze Water Pipe Ground Clamp 4-4/0 AWG 2.5-3.5 Inch Diameter

(No reviews yet) Write a Review

Model: 3904
Selected Model is

In Stock (leaves warehouse same day if ordered before 3pm ET)

$351.41
$263.40
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Blackburn Bronze Water Pipe Ground Clamp 4-4/0 AWG 2.5-3.5 Inch Diameter

Professional Water Pipe Grounding Solution

The Blackburn Bronze Water Pipe Ground Clamp delivers reliable electrical grounding for water pipe systems, accommodating conductor sizes from 4 AWG to 4/0 AWG and pipe diameters from 2.5 to 3.5 inches. Constructed with bronze conductor material for superior corrosion resistance and electrical conductivity, this UL E3060 listed ground clamp ensures code-compliant grounding connections in residential, commercial, and industrial applications.

Professional Features & Benefits

  • 4-4/0 AWG Conductor Range: Accommodates a wide range of grounding conductor sizes for versatile installation requirements and system compatibility.
  • 2.5-3.5 Inch Pipe Diameter: Designed to fit standard water pipe sizes commonly found in building infrastructure and utility systems.
  • Bronze Conductor Material: Provides excellent corrosion resistance and electrical conductivity for long-term reliability in moisture-prone environments.
  • UL E3060 Listed: Meets rigorous safety and performance standards for electrical grounding applications, ensuring code compliance and professional installation confidence.
  • Water Pipe Grounding Specialization: Engineered specifically for water pipe grounding connections, delivering secure mechanical and electrical contact.
  • USA Manufacturing: Built in the United States with quality materials and manufacturing processes for dependable performance.

Technical Specifications

  • Country Of Origin: United States (US)
  • Department: Electrical
  • Insulation Material: No
  • Material Of Conductor: Bronze
  • Product Group: Grounding & Bonding
  • Product Subgroup: Ground Clamps
  • Product Type: Ground Clamp
  • Selling Unit Of Measure: each
  • Standards: UL E3060
  • Type2: Grounding devices or assemblies

Professional Applications

  • Residential Water Service Grounding
  • Commercial Building Electrical Systems
  • Industrial Facility Grounding Networks
  • Multi-Unit Property Electrical Infrastructure
  • Municipal Water System Grounding
  • Electrical Contractor Installation Projects
  • Code Compliance Grounding Solutions

Why Choose Blackburn Quality?

Blackburn ground clamps deliver proven reliability with UL E3060 listing and USA manufacturing quality. The bronze conductor material ensures long-term performance in demanding grounding applications, while the precision-engineered design provides secure connections for professional electrical installations.

Manufacturer Resources

Product Specs

Country Of Origin:
United States (US)
Insulation Material:
No
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 3904 – Frequently Asked Questions

1) Will the Blackburn 3904 ground clamp fit a 3 inch water service pipe?
Yes. The Blackburn 3904 water pipe ground clamp covers pipe diameters from 2.5 to 3.5 inches, so a 3 inch water service line falls in the middle of its range. Anything smaller than 2.5 inch or larger than 3.5 inch needs a different size clamp in the series.
2) What size grounding electrode conductor can I land in a Blackburn 3904 clamp?
The 3904 accepts conductors from 4 AWG up to 4/0 AWG. That range covers the usual grounding electrode conductor sizes on residential and most commercial services, including the 4 AWG and 1/0 through 4/0 copper typically pulled to a water pipe electrode.
3) Can I use this clamp on 2 inch or 4 inch pipe if I snug it down hard?
No. The 3904 is built for 2.5 to 3.5 inch pipe only. Forcing it onto a 2 inch line or spreading it over a 4 inch main gives you incomplete seating and an unlisted connection, and an inspector can call it. Pick the clamp in the range that brackets your actual pipe OD.
4) Is a bronze ground clamp OK on a copper water pipe in a damp basement or crawlspace?
Bronze is the conductor material on the 3904, and it is the material normally specified for copper water pipe electrodes because bronze on copper avoids the dissimilar-metal corrosion you get with plated steel. That makes it suited to wet locations like crawlspaces, meter pits, and mechanical rooms.
5) Are Blackburn 3904 ground clamps made in the USA for a Buy American spec job?
Country of origin on the 3904 is the United States, which is what a government, school, or utility project with a domestic-sourcing clause will ask you to document.
6) Is the Blackburn 3904 sold as a single clamp or in a bag of multiples?
It is sold each, one clamp per unit, model 3904. Order one per electrode connection point and remember a typical water service bond also needs a second clamp if you are jumping around a meter or dielectric union.
How fast can I get the Blackburn 3904 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 3904 come with a warranty?
Absolutely. The Blackburn 3904 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 3904?
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 3904 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.
!