UL 1072 BULLETIN

Abstract

These requirements cover the shielded and nonshielded medium-voltage power cables that are described in Tables 1.1 (single-conductor) and 1.2 (multiple-conductor). Multiple-conductor cables may include one or more individually jacketed non-conductive optical-fiber members. These electrical and hybrid electrical and optical-fiber cables are for use (optical and electrical functions associated in the case of a hybrid cable) in accordance with Article 328 and other applicable parts of the National Electrical Code (NEC), ANSI/NFPA 70. <br>These cables have one or more stranded copper or aluminum conductors that are insulated with a solid, extruded dielectric. Cables that have a metal sheath or interlocked armor incorporate an effective grounding path. A grounding conductor is optional in other cables. Cables for direct burial are so marked and have an overall covering (see 1.4 for direct-burial cables that are not covered). Cables that are for use in cable trays generally are so marked (see 62.1 and 62.2). Cables that are sunlight-resistant generally are so marked (see 64.1 &#8211; 64.3). Cables that are marked "MV-90" or "MV-90 dry" have a maximum operating temperature of 90&#176;C (194&#176;F). Cables that are marked "MV-105" have a maximum operating temperature of 105&#176;C (221&#176;F) for use where design conditions require a maximum conductor temperature above 90&#176;C (194&#176;F). Cables that are marked "dry" have insulation for use only in dry locations. All other cables have insulation that is for use in both wet and dry locations. Multiple-conductor cables that include one or more optical-fiber members are surface marked to so indicate. Cables that are marked "oil resistant II" are for exposure to mineral oil at temperatures not in excess of 75&#176;C (167&#176;F). Cables that are marked "oil resistant I" are for exposure to mineral oil at temperatures not in excess of 60&#176;C (140&#176;F). <br>A multiple-conductor Type MV cable that has a smooth (other than lead) or corrugated metal sheath or that has interlocked metal armor may be marked for use also as Type MC cable. <br>This standard does not include requirements for cables with concentric neutral conductors. However, it is possible to have a single-conductor cable with a concentric neutral conductor manufactured in accordance with the requirements of other standards, that meets the requirements for jacketed single-conductor shielded cable in this standard.