1. "YJ" indicates a cross-linked polyethylene insulation, while "V" signifies polyvinyl chloride.2. The number "2" in "YJV22" and "YJV23" cables refers to the steel tape armor, while the number "3" indicates a polyethylene sheath for the former and a polyvinyl chloride sheath for the latter.3. The primary difference between YJV22 and YJV23 cables is the material used for the outer sheath: YJV22 uses polyvinyl chloride (PVC), while YJV23 employs polyethylene (PE). This distinction relates to the use of PVC versus PE in the outer covering.