SEU is a type SE (service entrance), Unarmored (U) cable.  Aluminum SEU cable is primarily used as panel feeder in multiple unit dwellings and for branch circuits.

    ASTM-B-800 and B-801
    UL Standard 44 for XHHW-2
    UL Standard 854 for SER/SRU
    RoHS environmental conductive requirement

    Conductor:AA-8030 aluminum alloy conductors
    Insuation:Cross-linked polyethylene(XLPE) Insulation
    Jacket: Sunlight resistant,moisture resistant and flame retardant