This specification covers the standard requirements for crosslinked chlorosulfonated polyethylene compounds intended for use as jacket materials (outer coverings) on electrical wires and cables for general-purpose, heavy-duty, and extra-heavy-duty service. The materials under this specification, however, are not recommended for applications with very low temperature service requirement. Physical tests shall be performed to assess the conformance of the jacket material with the physical property requirements such as tensile strength, tensile stress at elongation, elongation at rupture, tension set, and tear. Per service requirement, additional tests for sunlight and weather resistance shall be performed as well, and shall conform to the requirements specified.