Resistivity vs. Length: Proper current distribution is an important factor in the design and proper use of an anode wire for each application. For example, if a wire voltage drop of 10% or less is designed for proper current distribution in 1000ohm-cm water, anode segments of 45 feet should not be exceeded between electrical connections to a header cable with the 1.5 mm diameter wire. By comparison, use of the 3.0 mm diameter wire will permit the use of 110 ft. segments, while still allowing the desired 10% voltage drop.

As with all electrical conductors, the operating temperature of the wire affects the resistance. The table below shows the affect by assuming the wire will operate at the temperature of the surrounding electrolyte. The change in resistivity also changes the maximum amperage of the wire.

Savings: In many cases, LIDA® mixed metal oxide wire anodes offer savings over competitive anodes on an installed cost basis. This is possibly by balancing the high current density capability of mixed metal oxide coatings and the ability to tailor to desired lifetimes.

Flexibility of Use: LIDA® wire anodes can be used in a wide variety of cathodic protection applications. Their lightweight and malleability allow forming to complex configurations. The copper core provides high conductivity resulting in better current distribution along the entire length of the wire.