The main emphasis in the development program has been on interchangeability of the connectors and fittings and of their various components. Fortunately, most underground connectors are manufactured to standards established by several public utilities and these standards have gained wide acceptance across the U.S. The advantages of this standardization are great as not only may various components in a system be replaced without concern over the name of the manufacturer, date of manufacture and catalog numbers, but training of personnel and stocking of components are simplified. Compression tools which very often represent a sizeable investment will not be made
obsolete.