At times, a pipeline insulation joint may display occasional electrical current leakage, while at other times, it remains leak-free."

"In this scenario, when B and C are connected, and A's potential is 1.6V, while B and C have potentials of 0.6V. However, when B and C are disconnected, the potentials of B and A frequently converge to the same value, usually settling at 1.6V."