Bronze Hotline Clamps – Manufacturer & Exporter from India
Cable Glands India is a leading manufacturer and exporter of Bronze Hotline Clamps, also known as Bronze Hotline Clamp or Live Line Clamps, designed for making tap-off connections on energized overhead transmission and distribution lines without interrupting power supply. Our bronze hotline clamps are precision-engineered to provide superior electrical conductivity, exceptional corrosion resistance, and reliable mechanical grip across a wide range of conductor sizes.
What Are Bronze Hotline Clamps?
Bronze hotline clamps (also spelled Hotline Camps in some regional usage) are electrical connectors used by utility linemen to connect a branch conductor to a main live conductor while the line remains energized. They are commonly used in overhead power distribution, transformer tapping, and substation feeder work. The clamp body is cast or machined from high-strength bronze alloys, while the clamping screws or eye bolts are typically furnished in Stainless Steel for corrosion immunity and long-term reliability.
Key Features
- Material: Cast Bronze / Leaded Bronze / Aluminum Bronze
- Fasteners: Stainless Steel Eye Bolts (SS 304 / SS 316) for hot-stick operation
- Conductor Compatibility: ACSR, AAC, AAAC, ACAR, Copper conductors
- Conductor Size Range: 16 mm² to 630 mm² (AWG 6 to AWG 1000 kcmil)
- Thread Standard: Metric / UNC / BSP
- Finish: Natural, Tin-plated, or Silver-plated on contact surfaces
- Compliance: ASTM B62, ASTM B584, BS 2874, IS 318, DIN 17662
Conductor Size Range & Technical Specifications
| Clamp Type | Conductor Range (mm²) | Conductor Range (AWG / kcmil) | Compatible Conductor | Eye Bolt Material |
|---|---|---|---|---|
| HC-16/50 | 16 – 50 mm² | AWG 6 – AWG 1/0 | AAC, AAAC, Copper | SS 304 Eye Bolt |
| HC-50/150 | 50 – 150 mm² | AWG 1/0 – AWG 350 kcmil | ACSR, AAC, AAAC | SS 304 Eye Bolt |
| HC-150/240 | 150 – 240 mm² | AWG 350 – AWG 500 kcmil | ACSR, ACAR | SS 316 Eye Bolt |
| HC-240/400 | 240 – 400 mm² | AWG 500 – AWG 750 kcmil | ACSR, Copper Bundled | SS 316 Eye Bolt |
| HC-400/630 | 400 – 630 mm² | AWG 750 – AWG 1000 kcmil | ACSR, AAAC, ACAR | SS 316 Eye Bolt |
Bronze Alloys Used in Hotline Clamps – US & International Comparison
| Alloy Name | US Standard (ASTM/UNS) | International Standard | Composition | Key Properties |
|---|---|---|---|---|
| Leaded Tin Bronze (Gunmetal) | ASTM B62 / UNS C83600 | BS 1400 LG2 / IS 318 Gr.1 / DIN 2.0975 | Cu 85%, Sn 5%, Zn 5%, Pb 5% | Excellent machinability, corrosion resistant, ideal for electrical contacts |
| Phosphor Bronze | ASTM B139 / UNS C51000 | BS 2874 PB102 / IS 7811 / DIN CuSn5 | Cu 94.8%, Sn 5%, P 0.2% | High strength, excellent spring properties, wear resistant |
| Aluminum Bronze | ASTM B148 / UNS C95400 | BS 1400 AB1 / IS 305 / DIN CuAl10Fe3 | Cu 86%, Al 10%, Fe 4% | High tensile strength, excellent marine corrosion resistance |
| Silicon Bronze | ASTM B99 / UNS C65500 | BS 2872 CS101 / DIN CuSi3Mn1 | Cu 97%, Si 3%, Mn 1% | Good weldability, high strength, corrosion resistant |
| Manganese Bronze | ASTM B138 / UNS C67500 | BS 2874 / DIN CuZn37Mn3Al2 | Cu 58%, Zn 37%, Mn 3%, Al 2% | High strength, good wear resistance |
| Naval Brass / Tobin Bronze | ASTM B21 / UNS C46400 | BS 2874 / DIN CuZn38Sn1 | Cu 60%, Zn 39%, Sn 1% | Good seawater resistance, moderate strength |
| Tin Bronze (High Tin) | ASTM B505 / UNS C90700 | BS 1400 PB1 / IS 318 Gr.3 / DIN 2.1050 | Cu 89%, Sn 11% | High hardness, excellent wear and corrosion resistance |
| Nickel Aluminum Bronze | ASTM B148 / UNS C95800 | BS 1400 NAB / DIN CuAl10Fe5Ni5 | Cu 81%, Al 9%, Fe 5%, Ni 5% | Superior seawater corrosion resistance, high strength |
Applications of Bronze Hotline Clamps
- 11 kV, 33 kV, 66 kV, 132 kV, and 220 kV overhead distribution lines
- Live line tap connections and T-off joints on ACSR and AAC conductors
- Utility substation bus connections and transformer LT/HT tapping
- Rural electrification projects and last-mile connectivity
- Hot-stick live line maintenance operations by distribution utilities
Why Choose Cable Glands India for Bronze Hotline Clamps?
- ISO-certified manufacturing with strict dimensional and electrical testing
- Available in standard and custom conductor size combinations
- Stainless Steel Eye Bolts (SS304 / SS316) supplied as standard
- Fast global delivery: India, UK, USA, Middle East, Africa, Southeast Asia
- Compliance with ASTM, BS, IS, and DIN international standards
Frequently Asked Questions (FAQs)
What is a Bronze Hotline Clamp used for?
A bronze hotline clamp is used to connect a branch or tap conductor to a live (energized) main conductor without de-energizing the line. It is commonly used by utility line workers using insulated hot sticks during live line maintenance.
What conductor sizes do Bronze Hotline Clamps fit?
Our bronze hotline clamps are available for conductor sizes ranging from 16 mm² to 630 mm² (approximately AWG 6 to AWG 1000 kcmil), covering AAC, AAAC, ACSR, ACAR, and copper conductors.
Why use Stainless Steel Eye Bolts on Hotline Clamps?
Stainless steel eye bolts (SS 304 or SS 316) are used because they provide a corrosion-resistant, high-strength engagement point for insulated hot-stick tools used in live line operations. They also prevent galvanic corrosion at the interface with the bronze clamp body.
What bronze alloy is best for hotline clamps?
ASTM B62 / C83600 (Leaded Tin Bronze / Gunmetal) is the most widely used alloy for hotline clamps due to its excellent electrical conductivity, machinability, and corrosion resistance. Aluminum Bronze (C95400) is preferred for high-mechanical-strength applications.
Do you supply custom conductor range hotline clamps?
Yes. We manufacture hotline clamps to customer-specified conductor ranges, alloy grades, bolt sizes, and surface finishes. Custom designs with OEM branding are also available.
Get a Quote for Bronze Hotline Clamps
Contact us by email or phone to discuss your requirements for Bronze Hotline Clamps — including conductor size range, alloy grade, stainless steel eye bolt specification, quantity, and delivery destination. Our engineers will be happy to assist and quote you quickly.
📧 Email: sales@cableglandsindia.com
📞 Phone: +91-22-43449300 | +91-22-43449323