Lightning Protection Institute (LPI) Journeyman Practice Test 2026 - Free Journeyman Exam Practice Questions and Study Guide

Using copper conductors means the other lightning protection parts are usually copper or copper alloys. This keeps all the metal parts at similar electrochemical potential, preventing galvanic corrosion where dissimilar metals touch in the presence of moisture. Copper also provides consistent electrical conductivity and a reliable path for the surge current. Metals like steel or aluminum in contact with copper can form galvanic cells that corrode joints and degrade performance, and plastic isn’t a conductive metal for the protective path. So copper components are the natural, compatible choice when copper conductors are used.