How MMO Tubular Anodes Connect to Cables

Mar 30, 2021

How MMO Tubular Anodes Connect to Cables  

The cable to anode connection is critical to all impressed current anodes. Lead wire connections at the end of the anode often resulted in a higher rate of consumption, or “necking”, at that end of the anode that resulted in premature loss of lead wire connection. To help prevent the necking of the anode at the connection point, select anodes that were manufactured with an enlarged end if solid rods are to be specified. In addition, specific external epoxy encapsulation is employed to help reduce the necking of the anode.

Generally, the maximum acceptable resistance between the cable and the anode should be 0.01 ohms. Teflon seal, epoxy seal, and center connection are three common methods of achieving the cable to anode connection and seal.

The tubular anodes with the lead wire connected in the center of the anode are now preferred over solid rod anodes as this helps reduce the chance of premature failure due to necking and ensure low connection resistance.