BURNDY Master Catalog (20190422)

Overhead Distribution

Mechanical (Bolted) Tap Connectors The BURNDY line of mechanical tap connectors is the most complete, dependable and economical available. These mechanical connectors consist of service, parallel, and midspan types. Generally the alloys and hardware used depend on whether the connector is for a strain or current carrying application, and is made of aluminum or copper. Particular alloys and hardware are selected for strength, conductivity, durability, ductility and resistance to corrosion. In a copper connector, high strength alloys are used in mechanical clamping components and high conductivity alloy in current carrying elements. Aluminum clamp type connectors are made of alloy 356, which is impervious to stress corrosion. In its heat-treated state, it has high strength and is used for both current carrying and clamping elements. Mechanical (Bolted) Tap Connectors Recommended Tightening Torque / Standard Wrench Size

Hardware is high strength and corrosion-resistant. In copper connectors, DURIUM™, a silicon bronze alloy, is used. Anodized aluminum alloy 2024-T4 bolts and 6061-T6 nuts are used in aluminumconnectors. They provide the best combination of strength, resistance to galling and corrosion, and their thermal coefficient of expansion is most suitable for aluminum. To insure dependable connections, bolts should be tightened to the recommended torque values shown in the specific product table or in the table below. These mechanical tap connectors are mainly used in overhead distribution systems to provide primary service taps and/or secondary service drop connections to the end users. A few of the key features and benefits of these connectors are:

Features and Benefits

• High strength alloys provides efficient and reliable performance • Range taking designs accommodate a large range of conductors in either groove; reducing inventory needs to a minimum • Matched groove designs ensure maximum contact with conductors accommodated • Hex bolts, nuts, and washers provide high contact pressure and rapid assembly

Recommended Tightening Torque

Standard Wrench Size

Recommended Torque (Inch Lbs.)

Bolt Size

Bolt

Nut

DURIUM™ and Galvanized Hardware

1/4 - 20 5/16 - 18 3/8 - 16 1/2 - 13 5/8 - 11 3/4 - 10 1/2 - 13 5/8 - 11 3/4 - 10

80

7/16

7/16

180 240 480 660

1/2

1/2

9/16

9/16

3/4

3/4

15/16 1-1/8

15/16 1-1/8

1050

Aluminum Hardware*

300 480 620

3/4

3/4

15/16 1-1/8

15/16 1-1/8

* Aluminum bolts are lubricated. If no tightening torque is listed in the following catalog pages, use values in table above.

RecommendedBURNDY ® TorqueWrench

TorqueRange

BTW30150 BTW150750

30 - 150 in-lbs 150 - 750 in-lbs

1-800-387-6487 (Canada) 1-603-647-5299 (International)

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