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Manufacturer Resources
Product Specs
- Country Of Origin:
- Mexico (MX)
- Outside Diameter:
- 7/8 in
- Product Group:
- Wire & Cable Management
- Product Type:
- Ground Clamps
- Selling Unit Of Measure:
- each
- Spacing:
- 1 in
- Type2:
- Mechanical connectors
- Department:
- Electrical
- Product Subgroup:
- Connectors
- Product Material:
- Bronze
Blackburn 31215 – Frequently Asked Questions
1) What size pipe or copper tube does the Blackburn 31215 ground clamp fit?
The 31215 is sized for copper tube with a 7/8 inch outside diameter, so measure the OD of the water pipe or tube you are bonding to before ordering. If your pipe measures larger or smaller across the outside, this clamp will not seat properly and you need a different size in the series.
2) What ground wire sizes will the Blackburn 31215 clamp accept?
It takes grounding electrode conductors from 6 AWG through 2 AWG, which covers the usual copper bonding jumper sizes an electrician runs to a water pipe electrode. Anything smaller than 6 or larger than 2 needs a different clamp.
3) Is this a bronze ground clamp, and can it go on a copper water pipe without causing corrosion problems?
The 31215 body is bronze, which is the standard pairing with copper tube for a grounding electrode connection because the two metals sit close together galvanically. It is a mechanical connector, so the conductor is clamped under a screw rather than crimped or exothermically welded.
4) What does the strain relief on the Blackburn 31215 do, and do I still need to secure the conductor separately?
The strain relief is built into the clamp and grips the grounding conductor so pulls on the wire are taken by the clamp body instead of the conductor terminal. That matters on an exposed water pipe electrode where the bonding jumper can get bumped or snagged. Standard practice is still to support the conductor along its run; the strain relief protects the termination, not the whole cable.
5) Is the Blackburn 31215 sold individually or in a box of multiple clamps?
It is sold each, one clamp per unit, so a contractor stocking a service panel job orders the exact count needed rather than a carton. The manufacturer part number is 31215 and the clamp is made in Mexico.
How fast can I get the Blackburn 31215 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 31215 come with a warranty?
Absolutely. The Blackburn 31215 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 31215?
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 31215 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.