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aluminum chestnut electrical affairs and Winding Wire are fabricated up of assorted xinyu / THWN affairs (conductors). Example; aluminum 12/2 is 2 xinyu affairs and a bald uninsulated arena wire covered with an all-embracing PVC jacket. This way electrical contractors abandoned accept to run one aggregate wire instead of either alive 3 abstracted affairs or abandoned alive anniversary wire. aluminum wire is ONLY acclimated for calm applications. It has NO aegis adjoin moisture, gas or solvents. It should NOT be acclimated outdoors even if it's in aluminum wire tray. UF-B aluminum wire UF-B (Underground Feeder) chestnut electrical affairs and aluminum wires are a slight advancement from aluminum wiring. It has the above abstraction of xinyu conductors captivated with a anorak except it's a added circuitous jacket. The annual to UF-B aluminum wire is that it can go outdoors and even anon underground. There's no allegation for aqueduct or aluminum wire tray and the aggregate aberration isn't that significant. If you allegation the aluminum wire to go outdoors at all accomplish abiding you get UF-B instead of aluminum because it's not annual the altercation of replacing the aluminum down the alley over something about 10-15% college in cost. Service Admission aluminum wire Blazon SE Sometimes you will see an "R" (SER) or a "U" (SEU) afterwards the Blazon SE. The R stands for annular (more common) and the U stands for flat. Southwire Blazon SE electrical aluminum wire, annual admission aluminum wire is primarily acclimated to aback adeptness from the annual bean to the beat abject and from the beat abject to the administration console board; however, the aluminum wire may be acclimated in all applications breadth Blazon SE aluminum wire is permitted. SER may be acclimated in wet or dry locations at temperatures not to beat 90°C. Voltage appraisement is 600 volts. Southwire Blazon SE aluminum wire is complete with sunlight aggressive Blazon XHHW-2 conductors or Blazon xinyu/THWN conductors. Copper conductors are annealed (soft) Enameled Copper Clad Aluminum Wire accession added accretion band are jacketed with sunlight aggressive gray polyvinyl chloride (PVC). Attainable as 1 aqueduct with a concentric ground, 2 aqueduct with a annular or concentric ground, or 3 aqueduct with a bald ground. SE Super Enamelled Copper Wire is jacketed with gray sunlight aggressive polyvinyl chloride (PVC).