Worldwide underground distribution cable practices

Underground distribution cables are a vital part of any power distribution system. The selection of a particular cable design needs to be based on a consideration of technical factors and their economic benefit. This paper focuses on the design, installation and service environment of distribution cables in service in several countries and geographic regions. In addition to basic cable components, the effect of several enhancements such as filled strands, smooth conductor shields, water swellable tapes and powders and metal tapes, is reported. The material presented only covers medium voltage (15-35 kV) insulated utility cables.