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Manufacturer Resources
Product Specs
- Country Of Origin:
- India (IN)
- Product Group:
- Grounding & Bonding
- Product Type:
- Hot-Line Clamp Protected Thread
- Selling Unit Of Measure:
- each
- Surface Finishing:
- Tin-Plated
- Tap Size:
- 3/0 to #6 ACSR AWG4/0 to #6 SOL AWG
- Type2:
- Electrical taps
- Voltage Rating:
- 35 kV
- Department:
- Electrical
- Product Subgroup:
- Ground Clamps
- Product Material:
- Aluminum
Blackburn HLC3974AP9 – Frequently Asked Questions
1) What conductor range does the Blackburn HLC3974AP9 hot-line clamp take?
The HLC3974AP9 accepts 3/0 through #6 ACSR and 4/0 through #6 solid AWG. That covers both the main run and the tap side, so if your conductor falls outside that range (larger than 4/0 solid, or smaller than #6) you need a different clamp size.
2) What voltage is this Blackburn hot-line clamp rated for?
Rated 35 kV, so it's suited to distribution work up to that class. Anything above 35 kV needs a higher-rated clamp.
3) Can I use an aluminum hot-line clamp on copper conductor?
The HLC3974AP9 body is aluminum with a tin-plated finish. Tin plating is what makes it acceptable on either aluminum or copper conductor, because the plating keeps bare aluminum from sitting directly against copper and setting up galvanic corrosion at the contact.
4) What does "protected thread" mean on a hot-line clamp, and why would I want it?
It means the eye-screw thread is shielded so it does not get fouled by dirt, ice, or corrosion while the clamp sits energized on the line for years. That matters because the clamp has to be operated with a hot stick at some later date, and a seized thread is the usual reason a crew cannot break the tap loose. The HLC3974AP9 is built as a protected-thread hot-line clamp.
5) Is a hot-line clamp the right choice, or should I be using a compression tap connector?
A hot-line clamp like the HLC3974AP9 is for taps you need to make or break while the line is energized, using a hot stick, and for connections you expect to disconnect again (transformer taps, temporary services, sectionalizing). If the tap is permanent and nobody will ever need to open it, a compression or wedge tap connector is the better pick. Choose the clamp where reopening it matters.
6) Will this clamp work on ACSR, or only on solid conductor?
Both. The HLC3974AP9 is sized for 3/0 to #6 ACSR as well as 4/0 to #6 solid AWG, so it covers stranded aluminum conductor steel reinforced line as well as solid. Note the ACSR range tops out a size lower than the solid range at 3/0.
7) Is the Blackburn HLC3974AP9 sold individually or in a box quantity?
It ships as each, one clamp per unit, so order the count you need for the job rather than a carton multiple.
8) Where is the Blackburn HLC3974AP9 made?
Country of origin is India. Useful if you are filing origin documentation on a utility or government-funded project.
How fast can I get the Blackburn HLC3974AP9 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 HLC3974AP9 come with a warranty?
Absolutely. The Blackburn HLC3974AP9 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 HLC3974AP9?
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installation tips, and troubleshooting. Contact Us
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