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CU TP SPLICE LONG BRL 350STR RED
Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Wire & Cable Management
- Product Type:
- Long Barrel Copper Splice
- 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:
- Splices
- Product Color:
- Red
- Product Material:
- Copper
Blackburn CU350 – Frequently Asked Questions
1) What conductor size does the Blackburn CU350 splice take?
The CU350 is sized for 350 kcmil stranded copper conductor, which is what the 350STR in the part description refers to. It is a compression splice, so both ends are crimped onto the conductor rather than bolted. One splice per selling unit.
2) Is the CU350 splice rated for medium voltage cable?
Yes. The CU350 carries a 35 kV voltage rating, so it can be used in medium voltage splices as well as low voltage feeder work. It is UL listed under file E9809.
3) Can I use a copper compression splice on aluminum conductor?
No. The CU350 is a copper-bodied splice for copper conductor only. For aluminum, or for a copper-to-aluminum transition, you need a connector marked AL9CU (dual rated) or an aluminum-bodied splice. Putting bare aluminum into a copper-only barrel risks a galvanic, high-resistance joint.
4) What does the red color on a Blackburn compression splice mean?
Red is the die color code for this connector, the marking an electrician matches to the correct die set in the crimp tool. The CU350 is color coded red, so it gets crimped with the red die rather than whatever die happens to be in the head.
5) Why choose a long barrel splice over a standard barrel?
A long barrel gives room for two crimps per side instead of one, which raises pull-out strength and is what many specs call for on larger feeder conductors and on medium voltage terminations. The CU350 is the long barrel version for 350 kcmil copper. If the spec only calls for a single crimp per side, a short barrel splice will do the same electrical job in less space.
6) Do I need one CU350 per conductor or one per run?
One per conductor being spliced. The CU350 ships as a single splice, each, so a three-phase 350 kcmil splice with a neutral takes four of them. Order counts per conductor, not per cable run.
7) Is the Blackburn CU350 tin plated, and does that matter in a wet location?
The barrel is tin plated over copper. The plating slows oxidation on the copper surface, which helps where the splice sits in a damp manhole, handhole, or below-grade pull box. It does not make the splice waterproof on its own, so the joint still needs the tape, heat shrink, or splice kit the installation calls for.
8) What is the exact part number and who makes the CU350 splice?
Blackburn is the brand and CU350 is the manufacturer part number, described as CU TP SPLICE LONG BRL 350STR RED. Country of origin is Mexico.
How fast can I get the Blackburn CU350 delivered?
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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 CU350 come with a warranty?
Absolutely. The Blackburn CU350 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 CU350?
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