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Manufacturer Resources
Product Specs
- Country Of Origin:
- United States (US)
- Insulation Material:
- N
- Material Of Conductor:
- Bronze
- Product Group:
- Grounding & Bonding
- Product Type:
- Ground Clamp
- Selling Unit Of Measure:
- each
- Type2:
- Grounding devices or assemblies
- Department:
- Electrical
- Product Subgroup:
- Ground Clamps
Blackburn GMS1TB – Frequently Asked Questions
1) What wire size range does the Blackburn GMS1TB tower ground clamp take?
The GMS1TB accepts grounding conductors from 8 AWG solid up to 4 AWG. If your ground electrode conductor is larger than 4 AWG, this single tower clamp is the wrong size and you need a larger-range clamp.
2) Is the Blackburn GMS1TB clamp bronze, and can it be used direct burial or outdoors?
Bronze is the conductor material on the GMS1TB, which is the standard corrosion resistant body material electricians look for on grounding clamps used at rods, water pipe, and other electrode connections in damp or buried locations. Bronze is preferred over plated steel where moisture and soil contact are involved.
3) What is a single tower ground clamp used for versus a two-conductor clamp?
A single tower clamp like the GMS1TB has one clamping tower, so it terminates one grounding conductor at the connection point. If you need to land two grounding or bonding conductors at the same point, a single tower clamp will not do it and you want a dual or multi-tower version instead.
4) Is the Blackburn GMS1TB made in the USA for a Buy American job spec?
Country of origin on the GMS1TB is the United States, which is the detail institutional and government procurement buyers need when domestic sourcing is written into the specification.
5) What part number do I order for the Blackburn 8 solid to 4 single tower ground clamp?
Order Blackburn GMS1TB. That is the manufacturer part number for the bronze single tower grounding clamp rated for 8 AWG solid through 4 AWG conductors.
6) Is this Blackburn tower clamp insulated?
No. The GMS1TB is a bare, uninsulated bronze grounding clamp, which is normal for a ground connection. If you need the connection covered, that is handled with a separate boot or cover, not by the clamp itself.
7) Is the Blackburn GMS1TB sold individually or in a box quantity?
It ships as a single clamp, sold each, so the quantity you order is the number of clamps you get. Useful to know if you are pricing out a multi-unit grounding job and need a count per opening or per rod.
How fast can I get the Blackburn GMS1TB 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 GMS1TB come with a warranty?
Absolutely. The Blackburn GMS1TB 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 GMS1TB?
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 GMS1TB 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.