Identify the type of lug used for connecting aluminium cable to copper bus bar from the given options.

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 2
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  1. Insulated sleeve lug
  2. Bi-metallic cable lug
  3. Bi-metallic cable connector
  4. Copper lug

Answer (Detailed Solution Below)

Option 2 : Bi-metallic cable lug
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  • Bimetallic Lugs are mostly useful where an aluminum cable has to be terminated by a copper bus bar or copper contact.
  • If Cable Lugs of only copper or aluminum are used, a galvanic action occurs due to dissimilar contact. The use of bimetallic lugs thus ensures a technically sound and durable joint.
  • The Aluminium barrel is friction welded to the copper palm thereby achieving the best possible transition between barrel & palm.
  • Copper lugs (cable lugs) are devices used for connecting cables to electrical appliances, other cables, surfaces, or mechanisms.
  • The clamps that connect wires to an automotive battery are a common example of copper lugs, as are the ends of battery jumper cables
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