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Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Insulation Material:
- None
- Product Group:
- Wire & Cable Management
- Product Type:
- Splice Connector
- Selling Unit Of Measure:
- each
- Standards:
- UL E9809
- Sub Brand Label:
- Blackburn
- Surface Finishing:
- Tin Plated
- Type2:
- Wire or cable compression splice
- Voltage Rating:
- 35 kV
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Color:
- White
- Product Material:
- Copper
Blackburn CU300 – Frequently Asked Questions
1) What conductor size does the Blackburn CU300 splice connector take?
The CU300 is sized for 300 kcmil copper conductor, which is what the 300 in the part number designates. It is a long barrel compression splice, so both conductor ends butt inside a single tube and get crimped. Colour code is white.
2) Is the Blackburn CU300 splice insulated, or do I have to tape or shrink over it?
It ships bare. Insulation material is listed as none, so the splice barrel is uninsulated metal and you finish it yourself with tape, heat shrink, or a cold shrink tube rated for the circuit voltage. Plan that material into the job.
3) Why choose a long barrel compression splice over a split bolt or a mechanical connector?
A long barrel gives more crimp length and therefore more contact area along each conductor, which is why it is the usual choice on 300 kcmil feeder splices and in direct buried or high vibration runs. Split bolts and set screw mechanicals are quicker but stay serviceable and bulky. The CU300 is a permanent compression joint, so you need the matching die and a hydraulic crimper on site.
4) What does the white colour code on the CU300 mean?
White is the die colour code for this connector. On Blackburn compression connectors the colour tells the installer which crimp die set matches the barrel, so match your die to white rather than eyeballing the barrel size.
5) Does the tin plating on the Blackburn CU300 matter for corrosion?
Tin plating over the copper barrel slows oxidation at the conductor interface and is what lets the same splice be used in damp, underground, or outdoor enclosures without the bare copper going green under the crimp.
How fast can I get the Blackburn CU300 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 CU300 come with a warranty?
Absolutely. The Blackburn CU300 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 CU300?
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 CU300 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.