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Manufacturer Resources
Product Specs
- Country Of Origin:
- India (IN)
- Insulation Material:
- No
- Material Of Conductor:
- Copper
- Product Group:
- Grounding & Bonding
- Product Net Depth Length:
- 6-5/16 in
- Product Type:
- Ground Clamp
- Selling Unit Of Measure:
- each
- Standards:
- UL E3060, CSA 12798
- Type2:
- Grounding devices or assemblies
- Department:
- Electrical
- Product Subgroup:
- Ground Clamps
Blackburn GUV4021 – Frequently Asked Questions
1) What size ground rod does the Blackburn GUV4021 U-bolt clamp fit?
The GUV4021 is sized for ground rods in the 4 to 4.5 range called out in its designation (4-4.5 rod). It is a U-bolt style clamp, so the rod sits in the saddle and the U-bolt draws down on it. If your rod falls outside that range, you need a different clamp in the GUV series rather than forcing this one.
2) What conductor sizes will the GUV4021 ground clamp accept?
It takes 4 AWG through 2/0 AWG conductor. That covers the usual grounding electrode conductor sizes on residential and light commercial services, but if you are landing a 4/0 you will need a larger clamp.
3) Is the GUV4021 ground clamp UL listed?
Yes. It carries UL E3060 and CSA 12798, so it is listed on both sides of the border, which matters if you are standardizing grounding hardware across facilities in the US and Canada.
4) Is the Blackburn GUV4021 clamp copper or bronze, and can I use it with a copper conductor on a galvanized rod?
The clamp body is copper, and it is built for copper conductor. Copper on copper is the pairing this part is intended for, which is what keeps dissimilar-metal corrosion out of the connection at the electrode.
5) Is a U-bolt clamp like the GUV4021 the right choice for a driven ground rod, or should I use a direct burial acorn clamp?
A U-bolt clamp clamps the conductor against the rod with a saddle and threaded U-bolt, and it is the common choice for accessible rod connections where you want a solid mechanical grip on 4 AWG through 2/0. Where the connection gets buried, confirm the clamp you use is marked for direct burial for that installation; the choice comes down to whether the connection stays accessible or goes under grade.
6) Is the Blackburn GUV4021 sold individually or in a box?
Sold each, so the quantity you order is the number of clamps you get. Order one per electrode connection.
7) Does the GUV4021 come with any insulation or cover?
No. It is a bare copper mechanical connector with no insulating cover, which is normal for a grounding electrode connection at the rod.
How fast can I get the Blackburn GUV4021 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 GUV4021 come with a warranty?
Absolutely. The Blackburn GUV4021 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 GUV4021?
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 GUV4021 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.