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Manufacturer Resources
Product Specs
- Country Of Origin:
- India (IN)United States (US)
- Outside Diameter:
- 9/16 in
- Product Group:
- Wire & Cable Management
- Product Type:
- Two-Bolt Connector
- Selling Unit Of Measure:
- each
- Standards:
- UL E9809
- Type2:
- Mechanical connectors
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Material:
- Copper
Blackburn 2B40X – Frequently Asked Questions
1) What wire sizes does the Blackburn 2B40X two-bolt connector take?
The 2B40X is rated for 1/0 through 4/0 conductors. It's a copper mechanical connector, so use it on copper conductors within that range, not aluminum.
2) Does the Blackburn 2B40X come with a spacer?
No. The 2B40X is the without-spacer version. Spacers are used when you're splicing two conductors of noticeably different sizes so the smaller one seats properly under the bolt pressure. If your two runs are close in size within the 1/0 to 4/0 range, the no-spacer 2B40X is what you want; if you're joining a small conductor to a large one, order the spacer version of the same connector instead.
3) Can I use the Blackburn 2B40X on aluminum conductors?
No. It's a copper-bodied connector, so keep it to copper-to-copper connections. For aluminum or a mixed copper-to-aluminum splice you need a connector specifically listed AL9CU or for aluminum use.
4) Is the Blackburn 2B40X a UL listed connector?
Yes, it carries UL file E9809. That's the reference an inspector or a spec writer will want on a mechanical splice connector for a commercial or institutional job.
5) How much room do I need in the box or enclosure for a Blackburn 2B40X splice?
The connector body has a 9/16 in outside diameter, so plan your gutter, pull box or splice can around that plus the bolt heads and whatever insulating tape or cover you apply over the finished splice.
6) Is the Blackburn 2B40X sold individually or in a box of multiples?
It ships as one piece, sold each. If you're splicing a three-phase feeder plus neutral you'll need to order four.
7) Why two bolts instead of one on this Blackburn splice connector?
Two-bolt construction spreads the clamping load over a longer contact length, which is what larger conductors like 1/0 through 4/0 need to hold mechanically and keep resistance down. A single-bolt connector is generally used on smaller conductors. Order the 2B40X when you're on the heavier end of the feeder range.
8) What is the manufacturer part number for the Blackburn copper two-bolt connector for 1/0-4/0?
Blackburn 2B40X. That's the number to quote for the copper two-bolt mechanical connector covering 1/0 through 4/0 without a spacer.
How fast can I get the Blackburn 2B40X 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 2B40X come with a warranty?
Absolutely. The Blackburn 2B40X 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 2B40X?
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installation tips, and troubleshooting. Contact Us
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