UL 651B-2007
连续长度高密度聚乙烯(HDPE)导管
UL Standard for Safety Continuous Length HDPE Conduit Second Edition
2007-08
- 标准号
- UL 651B-2007
- 发布
- 2007年
- 发布单位
- 美国保险商实验所
- 替代标准
- UL 651B BULLETIN-2007
- 当前最新
- UL 651B CRD-2011
- 适用范围
- This Standard covers coilable, smooth-wall, continuous length conduit with a circular cross section. The conduit is Schedule-40, Schedule-80, EPEC-A, or EPEC-B High Density Polyethylene (HDPE) in trade sizes 1/2 (16) - 6 (155). This product is intended for installation in accordance with the National Electrical Code, NFPA 70. The values in parentheses are metric trade designators of conduit. The designations Schedule-40, Schedule-80, EPEC-A, and EPEC-B refer to conduit having specific outside diameters and wall thicknesses.This product is for aboveground use where encased in not less than 2 inches (51 mm) of concrete and for underground use by direct burial or encasement in concrete. A product that contains features, characteristics, components, materials, or systems new or different from those covered by the requirements in this standard, and that involves a risk of fire, electric shock, or injury to persons shall be evaluated using the appropriate additional component and end-product requirements to determine that the level of safety as originally anticipated by the intent of this standard is maintained. A product whose features, characteristics, components, materials, or systems conflict with specific requirements or provisions of this standard shall not be judged to comply with this standard. Where appropriate, revision of requirements shall be proposed and adopted in conformance with the methods employed for development, revision, and implementation of this standard.