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Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Number Of Conductors:
- 2
- Product Group:
- Wire & Cable Management
- Product Type:
- Dual-Rated Mechanical Connector
- Selling Unit Of Measure:
- each
- Spacing:
- 1/4 in
- Standards:
- UL E9809
- Surface Finishing:
- Tin-Plated
- Type2:
- Mechanical connectors
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Material:
- Aluminum
Blackburn ADR21-21 – Frequently Asked Questions
1) Can the Blackburn ADR21-21 connector be used on both copper and aluminum conductors?
Yes. The ADR21-21 is a dual-rated mechanical connector, so it's approved for copper and aluminum conductors. The aluminum body is tin-plated, which is what makes the dual rating possible by keeping the copper from contacting bare aluminum. It carries UL file E9809.
2) What wire range does the Blackburn ADR21-21 take?
The ADR21-21 accepts 14 AWG through 2/0 conductors in each of its two ports, so one connector covers everything from small branch circuit wire up to 2/0 feeder or grounding conductors.
3) How many wires can land in the ADR21-21 and how does it mount?
It's a two-conductor connector with a single hole for mounting. The mounting hole is sized for 1/4 inch hardware, so it bolts to a panel, enclosure wall, or ground bus with a 1/4 inch bolt or stud, and then lands two conductors under its setscrews.
4) What does the 1/4 inch spacing spec on the Blackburn ADR21-21 mean for my mounting surface?
The 1/4 in spacing value refers to the bolt hole dimension for the single hole mount, so the pad or bus you are mounting to needs a 1/4 inch clear hole and 1/4 inch hardware. Match the hardware to the hole; oversizing the bolt is not an option on a one-hole lug body.
5) Do I get one connector or a package when I order the Blackburn ADR21-21?
The ADR21-21 sells each, so one order quantity equals one connector. If you're bonding multiple panels or landing several ground runs, count your terminations and order a piece per connector.
How fast can I get the Blackburn ADR21-21 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 ADR21-21 come with a warranty?
Absolutely. The Blackburn ADR21-21 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 ADR21-21?
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 ADR21-21 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.