The most cost-effective method of attaching a wire lead to a steel pipe or structure is by using an exothermic weld. ThermOweld offers a wide selection mold options for attaching different wire sizes to a horizontal steel structure with an exothermic weld. The molds are designed for #6 AWG to #2/0 cables, but with the use of a copper sleeve you can attach a lead as small as #14AWG. The exothermic weld has the same melting point of copper, which gives you a direct, non-mechanical connections to the structure. By having this molecular connection, the weld will not loosen or corrode over time.