The structure of this document includes a table of contents, preface, and chapter content. The specific content of the chapter includes scope, normative reference documents, terms and definitions, cable models and product names, single-core hard conductor 70°C radiation cross-linked chlorinated polyethylene unsheathed cable, single-core soft conductor 70°C radiation cross-linked chlorinated polyethylene Polyethylene unsheathed cable, single-core hard conductor radiation cross-linked chlorinated polyethylene cable with a conductor temperature of 70°C for internal wiring, single-core soft conductor radiation cross-linked chlorinated with a conductor temperature of 70°C for internal wiring Polyethylene unsheathed cable, single-core hard conductor radiation cross-linked chlorinated polyethylene cable with a conductor temperature of 90°C for internal wiring, single-core soft conductor radiation cross-linked chlorinated with a conductor temperature of 90°C for internal wiring Polyethylene unsheathed cables, finished mechanical properties, etc.