This standard covers the following types of electrical polyvinyl chloride (PVC) conduit (EPC-40 and EPC-80). The designations ??40?? and ??80?? refer to Schedules 40 and 80@ respectively@ of iron pipe dimensions.EPC-40-PVC??Electrical PVC conduit designed for normal-duty applications above ground; also used for all concrete encased applications or direct burial.EPC-80-PVC??Electrical PVC conduit designed for heavy-duty (areas of physical damage) applications above ground; also used for all concrete encased applications or direct burial.NOTE??The values stated in U.S. customary units are to be regarded as the standard.?