Specific cable / buyer evidence

AAC vs ACSR: is there a steel core?

Two uninsulated conductor reels may both look aluminum from the outside yet have different core constructions. Southwire describes AAC as concentrically stranded aluminum 1350-H19 and ACSR as aluminum strands around a steel core. A seller’s name must be supported by identification or a safely disconnected end view.

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Distinct buyer question

Distinguish AAC bare aluminum conductor from steel-core ACSR using named construction and codeword data.

Checkable specification fields

These are examples from the named references, not assertions about a reel you have not shown us. Match the actual jacket, tag and part number before using a product claim.

FieldDocumented example / boundarySource
AAC materialSouthwire AAC construction: concentrically stranded aluminum 1350-H19, with no steel core described.[1]
ACSR materialSouthwire ACSR: aluminum 1350-H19 strands surrounding a steel core; standard core wire is class A galvanized.[2]
AAC table exampleSouthwire lists ROSE 4 AWG as 7 strands and 231 mil nominal outside diameter.[1]
ACSR table exampleSouthwire lists PENGUIN 4/0 AWG as 6 aluminum strands and 563 mil nominal outside diameter; compare exact codeword before use.[2]

Construction is the differentiator

AAC lacks the referenced steel reinforcement; ACSR has an internal steel core. An exterior photo does not disclose this reliably. Read the maker’s codeword, nominal AWG/kcmil and strand construction from a tag or specification, then corroborate with a clear disconnected cut-end photo where possible.

  • Record codeword, conductor material, nominal size, strand count and diameter.
  • Do not use two different codeword examples as if they were same-size equivalents.
  • Treat observed core coating or corrosion as condition, not a guessed grade.

Do not substitute a conductor table for a lot test

Southwire’s ASTM and dimension references describe its named products. They do not authenticate an unidentified reel or establish a voltage, ampacity, current acceptance or salvage price. A useful inquiry includes exact tag data, length basis, reel ID and condition.

  • Separate bare AAC/ACSR from copper-clad, insulated and composite constructions.
  • Ask for stored-outdoors and handling history if known.

Source notes and scope

The linked references support the specific examples above. Product designs and standards can change; seller-supplied markings, measured length and current condition require separate verification. Nothing here states that this buyer stocks, tests, guarantees or accepts a particular cable, or offers installation advice.

  1. Southwire AAC All-Aluminum Conductor
  2. Southwire ACSR Aluminum Conductor Steel Reinforced
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