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Manufacturer Resources
Product Specs
- Connection Type:
- Compression
- Country Of Origin:
- United States (US)
- Insulation Material:
- None
- Number Of Conductors:
- 2
- Product Group:
- Wire & Cable Management
- Product Type:
- Compression Splice
- Selling Unit Of Measure:
- each
- Standards:
- ANSI C119.4
- Type2:
- Wire or cable compression splice
- Department:
- Electrical
- Product Subgroup:
- Splices
- Product Size:
- 7-1/4 inch
- Installation Category:
- None
Blackburn CTS407 – Frequently Asked Questions
1) What conductor size does the Blackburn CTS407 splice take?
The CTS407 is sized for 4/0 solid copper conductors, one on each end. It's a two-conductor compression splice, so it joins one run to one run, not a tap or a multi-way connection.
2) Is the Blackburn CTS407 a bolted connector or does it need a crimp tool?
It's a compression fitting, so it has to be crimped with a hydraulic or battery compression tool and the correct die set. There are no set screws or bolts. Budget for tooling if you're only used to mechanical split-bolt connectors.
3) Is the CTS407 splice insulated, or do I need to tape or heat-shrink it?
Bare metal, no insulation on the barrel. Once crimped you have to rebuild the insulation yourself, with tape, heat shrink, or a cold-shrink sleeve rated for the circuit voltage. Plan the sleeve length around a 7-1/4 inch barrel.
4) Does the Blackburn CTS407 meet ANSI C119.4 for underground and direct-burial connections?
Yes, it's built to ANSI C119.4, the standard covering connectors for use between aluminum and copper conductors in underground, submersible and wet-location service. That's the spec inspectors and utility engineers look for on distribution splices.
5) Can I use the CTS407 to splice aluminum conductor to copper?
No. It's a copper-bodied splice specified for 4/0 solid copper on both ends. For a copper-to-aluminum transition use a connector marked AL9CU or a bimetallic splice sized to each conductor separately.
6) Will a 7-1/4 inch long splice fit in my handhole or pull box?
The barrel measures 7-1/4 inch, which is long for a tension splice, so check your working space before ordering. In a shallow handhole, a pedestal box, or a crowded gutter you need roughly that length of straight, unbent conductor plus room for the crimp tool head and the insulating sleeve over each end.
7) What does "tension" mean on the CTS407, and can it carry the mechanical pull of an overhead span?
A tension splice is rated to hold conductor pulling load as well as carry current, unlike a distribution or non-tension splice that only conducts. The CTS407 is a copper tension distribution splice for 4/0 solid, so it's the type used where the conductor itself is under mechanical strain rather than lying slack in a box.
8) Is the Blackburn CTS407 made in the USA for Buy American projects?
Country of origin is the United States, which is what federal, state and institutional jobs with domestic sourcing requirements ask for on submittals. Part number is CTS407.
9) How is the Blackburn CTS407 sold, and can I order a single piece?
Sold each, so one splice per unit of order. Order count by the number of joints in the run, and add spares, since a compression splice can't be reused if the crimp goes wrong.
How fast can I get the Blackburn CTS407 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 CTS407 come with a warranty?
Absolutely. The Blackburn CTS407 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 CTS407?
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selection,
installation tips, and troubleshooting. Contact Us
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