Min menu

Pages

News

Connecting Terminal Lugs to Terminal Blocks

 Connecting Terminal Lugs to Terminal Blocks

  • Terminal blocks are normally supplied with studs secured in place by a plain washer, an external tooth lock washer, and a nut. 
  • In connecting terminals, a recommended practice is to place copper terminal jugs directly on top of the nut, followed with a plain washer and elastic stop nut, or with a plain washer, split steel lock washer, and plain nut.
  • Aluminum terminal lugs should be placed over a plated brass plain washer, followed by another plated brass plain washer, split steel lock washer, and plain nut or elastic stop nut. 
  • The plated brass washer should have a diameter equal to the tongue width of the aluminum terminal lug. 
  • Consult the manufacturer’s instructions for recommended dimensions of these plated brass washers.
  •  Do not place any washer in the current path between two aluminum terminal lugs or between
  • two copper terminal lugs.
  •  Also, do not place a lock washer directly against the tongue or pad of the aluminum terminal.
  • To join a copper terminal lug to an aluminum terminal lug, place a plated brass plain washer over the nut that holds the stud in place; follow with the aluminum terminal lug, a plated brass plain washer, the copper terminal lug, plain washer, split steel lock washer and plain nut or self-locking, all-metal nut.
  • As a general rule, use a torque wrench to tighten nuts to ensure sufficient contact pressure.
  •  Manufacturer’s instructions provide installation torques for all types of terminals.

reactions :