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JUMPRCLMP UNPLATED
Manufacturer Resources
Product Specs
- Country Of Origin:
- India (IN)United States (US)
- Insulation Material:
- Bare
- Number Of Conductors:
- 2
- Product Group:
- Wire & Cable Management
- Product Type:
- Parallel-Groove Connector - Jumper Clamp
- Selling Unit Of Measure:
- each
- Surface Finishing:
- Bare
- Type2:
- Mechanical connectors
- Voltage Rating:
- 35 kV
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Material:
- Copper Alloy
Blackburn K3 – Frequently Asked Questions
1) What is a Blackburn K3 jumper clamp used for?
The Blackburn K3 is a parallel-groove mechanical connector, commonly called a jumper clamp. It bolts two bare conductors together side by side in parallel grooves, so it is used to tap or jumper one line conductor to another without cutting or splicing either run. It joins two conductors per clamp and is rated to 35 kV.
2) Can the K3 jumper clamp be used on medium-voltage distribution circuits?
Yes. The K3 carries a 35 kV voltage rating, which covers standard 15 kV, 25 kV and 35 kV class distribution work. Below that, it is equally usable on low-voltage grounding and bonding taps.
3) Is the Blackburn K3 clamp tin plated or bare copper?
Bare. The K3 is unplated copper alloy with a bare surface finish, so there is no tin coating. Bare copper alloy is the usual choice on copper-to-copper connections; if you are terminating aluminum or a mixed copper/aluminum joint, specify a plated, dual-rated connector instead.
4) Does the K3 clamp work on insulated cable or does the conductor have to be stripped?
The conductor has to be bare at the connection point. The K3 is a bare, uninsulated mechanical clamp with no insulation piercing or sealing feature, so strip the jacket back at the tap and re-insulate the completed joint with tape, a cover or a boot if the application calls for it.
5) How many conductors does one Blackburn K3 jumper clamp take?
Two, one in each groove. A parallel-groove clamp like the K3 makes a single two-conductor connection, so a three-phase jumper set needs three clamps per point, and clamps are sold individually rather than in a kit.
6) Is a parallel-groove jumper clamp the right choice, or should I use a compression connector?
A parallel-groove clamp like the K3 is bolted and mechanical, so it can be installed with hand tools and removed later, which is what you want for temporary jumpers, test taps and connections that get opened again. Compression connectors need a die and press and make a permanent joint, so they are the better pick for a connection that is buried, sealed up, or never coming apart.
7) What is the manufacturer part number for the Blackburn jumper clamp, and where is it made?
The part number is K3, from Blackburn. Country of origin is listed as India and the United States.
How fast can I get the Blackburn K3 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 K3 come with a warranty?
Absolutely. The Blackburn K3 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 K3?
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 K3 from ZenSupply?
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and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.