Zinsco Electrical Panel Buss & Lug Cleaning Bar, Large 4″ X 3/4″ X 1/2″.
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This large abrasive bar will not take metal away, it cleans down to the metal, it does not reconfigure the shape of the surface it is preparing. A buss bar, contact, lug or other surfaces are always oxidized with contaminated material that will deteriorate the conductivity of the metal surface through electrolysis over time. De-oxidizing and greasing the surface will take out the oxygen in the connection.
Where applicable: To increase metal to metal contact use a flat surface to polish and flatten lugs, and use a graded bolt, putting the bolt under clamp with the right amount of torque. This will increase the life of the connection.
Application instructions accompany each abrasive bar, Buss kit. com
It is estimated that there are over 100,000 electrical connection failures in the US daily