{
  "protocol": {
    "name": "CVP",
    "version": "1.0.0-proposed"
  },
  "document_status": "proposed",
  "calculator": {
    "id": "awg-to-mm",
    "version": "1.5.0",
    "title": "AWG to mm / mm² Calculator",
    "formula_family": "awg-geometry",
    "capability_id": "electrical.awg_to_mm",
    "verification_revision": "2026-09-10.wire-chart-claim-boundary"
  },
  "profile": "engineering",
  "verified_scope": "AWG geometry & calculation contract",
  "status": "VERIFIED",
  "runner": {
    "name": "cvp-runner",
    "version": "1.0.0"
  },
  "environment": {
    "runtime": "node",
    "runtime_version": "20.19.2",
    "numeric_model": "IEEE-754 binary64",
    "os": "darwin"
  },
  "suite": {
    "id": "awg-to-mm",
    "version": "1.5.0",
    "uri": "https://www.calculatorx.com/evidence/electrical.awg_to_mm/1.5.0.json",
    "verification_revision": "2026-09-10.wire-chart-claim-boundary"
  },
  "obligation_set": [
    "CVP-PROV-01",
    "CVP-MODEL-01",
    "CVP-SCOPE-01",
    "CVP-UNIT-01",
    "CVP-REF-01",
    "CVP-GOLD-01",
    "CVP-BND-01",
    "CVP-INV-01",
    "CVP-NUM-01",
    "CVP-COV-01",
    "CVP-CONTRACT-01",
    "CVP-DEP-01",
    "CVP-ART-01",
    "CVP-PROD-01",
    "CVP-DIM-01",
    "CVP-PROP-01",
    "CVP-IFACE-01"
  ],
  "provenance": {
    "mode": "direct",
    "sources": [
      {
        "label": "ASTM B258-18(2026) — Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors",
        "kind": "standard",
        "reference": "Table 1 standard nominal diameters/areas (secondary track: geometry.standard_nominal). 2026 is a reapproval of B258-18; the AWG geometric progression is unchanged.",
        "url": "https://www.astm.org/b0258-18r26.html"
      },
      {
        "label": "NBS Handbook 100 — Copper Wire Tables",
        "kind": "other",
        "reference": "American Wire Gage geometric progression (No. 0000 = 0.4600 in, No. 36 = 0.0050 in, ratio 92^(1/39)); International Annealed Copper Standard volume resistivity 1.7241 μΩ·cm at 20 °C",
        "url": "https://nvlpubs.nist.gov/nistpubs/Legacy/hb/nbshandbook100.pdf"
      },
      {
        "label": "100% IACS annealed copper resistivity (20 °C)",
        "kind": "other",
        "reference": "Material: annealed copper, 100% IACS; reference temperature 20 °C; ρ = 1.7241×10⁻⁸ Ω·m (NBS Handbook 100)"
      },
      {
        "label": "NFPA 70–style copper ampacity (educational; edition not pinned)",
        "kind": "other",
        "reference": "Table-like 310.16 family: copper, not more than three current-carrying conductors, no ambient or bundling correction"
      },
      {
        "label": "NIST Guide to the SI (SP 811)",
        "kind": "other",
        "reference": "Millimetre as SI length unit",
        "url": "https://www.nist.gov/pml/special-publication-811"
      }
    ]
  },
  "reference": {
    "items": [
      {
        "class": "O1",
        "reference_scope": "model",
        "scope": "model",
        "label": "ASTM B258-18(2026): unrounded geometric progression (primary) + Table 1 standard nominals (pinned dataset)"
      },
      {
        "class": "O1",
        "reference_scope": "model",
        "scope": "model",
        "label": "ASTM B258-18(2026) Table 1 SI/inch-pound standard nominals (pinned dataset; not formula)",
        "engine": {
          "name": "awg-astm-b258-table1",
          "independent_of_iut": true,
          "table_sha256": "74ab3dc5e65e9197bd4fee71381e86c81c9893fde763dacc7780e06eaf3eb9df",
          "source": "scripts/data/awg-astm-b258-table1.json",
          "public_table": "/developers/cvp/reproduce/awg-astm-b258-table1.json"
        }
      },
      {
        "class": "O2",
        "reference_scope": "expected_values",
        "scope": "expected_values",
        "label": "Separate-module AWG formula oracle — unrounded geometric progression (same V8 binary64 as IUT)",
        "engine": {
          "name": "awg-to-mm-reference",
          "precision_bits": 53,
          "independent_of_iut": true
        }
      },
      {
        "class": "O2",
        "reference_scope": "numerical_behavior",
        "scope": "numerical_behavior",
        "label": "Same O2 module backs ≤2 ULP formula diameter/area comparison vs IUT",
        "engine": {
          "name": "awg-to-mm-reference",
          "precision_bits": 53,
          "independent_of_iut": true,
          "extra_table_sha256": "bfe0dbb835a34e0755c7c1c4cb698f20b773aedbc6aaaae4e94ef50d2730e61c"
        }
      }
    ],
    "notes": "O1 Table 1 dataset scripts/data/awg-astm-b258-table1.json (sha256=74ab3dc5e65e…). Canonical n:mm:mm2 digest dataset=bfe0dbb835a3… engine=bfe0dbb835a3… row compare 60/60. Public copy: /developers/cvp/reproduce/awg-astm-b258-table1.json. O2 goldens compare unrounded formula primary value, not Table 1."
  },
  "controls": {
    "CVP-PROV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Sources present on evidence"
    },
    "CVP-MODEL-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Primary geometry is formula_derived; ASTM Table 1 is standard_nominal only for integer 4/0–56"
    },
    "CVP-SCOPE-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "CVP numerical verification covers AWG diameter/area geometry. Copper resistance is a 20 °C IACS material model. Ampacity is an educational code-context reference and is outside CVP golden numeric verification."
    },
    "CVP-UNIT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "AWG → mm / mm²"
    },
    "CVP-REF-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "O1 Table 1 identity + O2 formula expected_values/numerical_behavior; 60/60 SI-row identity vs IUT standard_nominal"
    },
    "CVP-GOLD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "13/13 legacy golden; 6/6 oracle-backed numeric"
    },
    "CVP-BND-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "5/5 CVP boundary · 6/6 legacy Evidence boundary"
    },
    "CVP-INV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "4 Evidence illegal-input + 2/2 oracle-backed error-code (exact_error_match, not ULP)"
    },
    "CVP-NUM-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "max_error_observed_ulp=0; policy declared a priori"
    },
    "CVP-COV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "5/5 declared partitions (geometry-formula, geometry-standard-nominal, copper-resistance-model, ampacity-reference-integrity, invalid-domain) · 13 legacy golden / 5 CVP boundary unique cases · 4 Evidence invalid-input (may overlap boundary)"
    },
    "CVP-CONTRACT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "1/1 contract checks"
    },
    "CVP-DEP-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "engine awg; Node binary64"
    },
    "CVP-ART-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "release_integrity.status=verified · evidence_digest=CVP verification fingerprint v2 (canonical inputs, expected/actual/status, policy, versions; independent of generated_at) · evidence_bundle_sha256=legacy Evidence JSON bytes · production_sha256=bound production attestation report"
    },
    "CVP-PROD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "CURRENT · site report stale · local checks pass · attestation_id=fcb416c58928cba9762ed3daca1d89d3fb31949829124a90388eca1df827099f · CURRENT · Public schema 1.5.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.5.0 · report output-const=pass · evidence-sha256=pass · semantic-contract=pass · capability-html-public-origin-agree=pass · cvp-manifest-public-origin-agree=pass · cvp-latest-alias-agrees=pass · cvp-immutable-manifest-fetch=pass · cvp-immutable-manifest-sha256=pass · cvp-latest-alias-matches-immutable=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=0223bc7d68cc3d7efa7cd8b91d912ab6f3c1ced3be224eab0fb377f2694d8367 · verified_at=2026-09-10T07:29:42.001Z · attested_at=2026-09-10T11:43:14.520Z · rendered_at=2026-09-10T12:25:39.034Z · binds=evidence_digest"
    },
    "CVP-DIM-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "Wire diameter and cross-section"
    },
    "CVP-PROP-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "5/5 property"
    },
    "CVP-META-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No input→output transformation vectors in pack — control not in obligation set"
    },
    "CVP-ROUND-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No inverse / round-trip vectors in pack — control not in obligation set"
    },
    "CVP-XCAL-01": {
      "result": "SKIP",
      "applicability": "not_applicable",
      "notes": "No related calculator in the same formula family / no related-identity peers declared — control not in obligation set"
    },
    "CVP-IFACE-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session. Human URL alias: /calc/wire/wire-gauge-chart?a=12&mode=awg-mm ≡ /calc/wire/awg-to-mm?awg=12&mode=awg-mm ≡ REST awg-to-mm and wire-gauge-chart ≡ MCP electrical.awg_to_mm."
    },
    "CVP-ORACLE-01": {
      "result": "SKIP",
      "applicability": "higher_assurance",
      "notes": "O2 present; O3 not required this wave"
    },
    "CVP-EXP-01": {
      "result": "SKIP",
      "applicability": "optional",
      "notes": "expert_reviewed=false"
    }
  },
  "tests": {
    "golden": {
      "passed": 6,
      "total": 6,
      "failed": 0,
      "case_ids": [
        "g-12-mm",
        "g-12-mm2",
        "g-36",
        "g-4-0",
        "g-0",
        "g-56"
      ]
    },
    "boundary": {
      "passed": 5,
      "total": 5,
      "failed": 0,
      "case_ids": [
        "awg-missing",
        "awg-empty",
        "awg-nan",
        "boundary-awg-1-0-token",
        "boundary-awg-12-5-finite"
      ]
    },
    "invalid": {
      "passed": 6,
      "total": 6,
      "failed": 0,
      "case_ids": [
        "awg-missing",
        "awg-empty",
        "awg-nan",
        "awg-invalid-field",
        "inv-awg-empty",
        "inv-awg-field"
      ],
      "comparison": "exact_error_match",
      "records": [
        {
          "id": "inv-awg-empty",
          "comparison": "exact_error_match",
          "expected": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "actual": {
            "code": "MISSING_REQUIRED_INPUT"
          },
          "match": true
        },
        {
          "id": "inv-awg-field",
          "comparison": "exact_error_match",
          "expected": {
            "code": "INVALID_MODE"
          },
          "actual": {
            "code": "INVALID_MODE"
          },
          "match": true
        }
      ]
    },
    "property": {
      "passed": 5,
      "total": 5,
      "failed": 0,
      "case_ids": [
        "prop-astm-table1-identity",
        "prop-standard-nominal-table1",
        "prop-iacs-resistivity",
        "prop-ampacity-table-integrity",
        "prop-ampacity-provenance"
      ],
      "claim_scope": "Table 1 identity, 20 °C IACS resistance model, and pinned educational ampacity dataset integrity — not NEC compliance",
      "definition_ids": [
        "awg-astm-table1-identity",
        "awg-standard-nominal-vs-table1",
        "awg-iacs-resistivity",
        "awg-ampacity-reference-integrity",
        "awg-ampacity-provenance"
      ]
    },
    "round_trip": {
      "passed": 0,
      "total": 0,
      "failed": 0,
      "case_ids": []
    },
    "metamorphic": {
      "passed": 0,
      "total": 0,
      "failed": 0,
      "case_ids": []
    },
    "contract": {
      "passed": 1,
      "total": 1,
      "failed": 0
    },
    "cross_interface": {
      "passed": 2,
      "total": 2,
      "failed": 0,
      "case_ids": [
        "iface-12",
        "iface-alias-chart-12"
      ]
    }
  },
  "coverage": {
    "partitions": [
      {
        "id": "geometry-formula",
        "description": "Unrounded AWG diameter/area formula",
        "exercised": true,
        "case_count": 21
      },
      {
        "id": "geometry-standard-nominal",
        "description": "ASTM B258 Table 1 standard nominal identity",
        "exercised": true,
        "case_count": 2
      },
      {
        "id": "copper-resistance-model",
        "description": "20 °C IACS copper resistance material model",
        "exercised": true,
        "case_count": 1
      },
      {
        "id": "ampacity-reference-integrity",
        "description": "Pinned educational ampacity dataset integrity (not NEC compliance)",
        "exercised": true,
        "case_count": 2
      },
      {
        "id": "invalid-domain",
        "description": "Invalid inputs",
        "exercised": true,
        "case_count": 6
      }
    ]
  },
  "numerical": {
    "representation": "IEEE-754 binary64",
    "claim_scope": "CVP numerical verification covers AWG diameter/area geometry (unrounded formula + ASTM Table 1 identity). Copper resistance is a 20 °C IACS material model. Ampacity is an educational code-context reference and is outside CVP golden numeric verification.",
    "tolerance": {
      "type": "ulp",
      "value": 2,
      "rationale": "Unrounded AWG geometric diameter/area; ≤2 ULP vs separate-module O2 (same V8). Declared a priori. ASTM Table 1 is a separate exact nominal track.",
      "declared_before_evaluation": true
    },
    "max_error_observed": 0,
    "records": [
      {
        "id": "g-12-mm",
        "reference": {
          "value": 2.0525253884939474,
          "unit": "mm",
          "gauge": "12",
          "gauge_n": 12,
          "geometry": {
            "diameter_mm": 2.0525253884939474,
            "area_mm2": 3.308772876111475,
            "area_kcmil": 6.529946789032534
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 5.210693101504721,
            "resistance_ohm_per_1000_ft": 1.5882192573386391,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 2.0525253884939474,
          "unit": "mm",
          "gauge": "12",
          "gauge_n": 12,
          "geometry": {
            "diameter_mm": 2.0525253884939474,
            "area_mm2": 3.308772876111475,
            "area_kcmil": 6.529946789032534,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 2.0525253884939474,
              "area_mm2": 3.308772876111475,
              "area_kcmil": 6.529946789032534,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 2.052,
              "area_mm2": 3.308,
              "diameter_mil": 80.8,
              "area_cmil": 6530,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 5.210693101504721,
            "resistance_ohm_per_1000_ft": 1.5882192573386391,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": {
              "60C_A": 20,
              "75C_A": 25,
              "90C_A": 30,
              "basis": "NFPA 70–style copper ampacity (educational; code edition not pinned)",
              "assurance": "code_context_required",
              "code_context_required": true,
              "educational_reference": true,
              "code_edition_not_pinned": true,
              "jurisdiction_usable": false,
              "source_family": "NFPA_70",
              "table_like": "310.16",
              "edition": null,
              "material": "copper",
              "condition": {
                "current_carrying_conductors": "not_more_than_three",
                "ambient_correction": false,
                "bundling_adjustment": false,
                "wiring_method": "not_specified",
                "termination_temperature": "not_specified"
              },
              "note": "Thermal ampacity reference ≠ permitted branch-circuit rating. Educational NFPA 70–style values (table-like 310.16); not an adopted code edition and not jurisdiction-usable. No ambient or bundling derating. Confirm conductor type, termination temperature, and local code (NEC 240.4(D) often limits 14/12/10 AWG copper OCPD to 15/20/30 A)."
            }
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "g-12-mm2",
        "reference": {
          "value": 3.308772876111475,
          "unit": "mm²",
          "gauge": "12",
          "gauge_n": 12,
          "geometry": {
            "diameter_mm": 2.0525253884939474,
            "area_mm2": 3.308772876111475,
            "area_kcmil": 6.529946789032534
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 5.210693101504721,
            "resistance_ohm_per_1000_ft": 1.5882192573386391,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 3.308772876111475,
          "unit": "mm²",
          "gauge": "12",
          "gauge_n": 12,
          "geometry": {
            "diameter_mm": 2.0525253884939474,
            "area_mm2": 3.308772876111475,
            "area_kcmil": 6.529946789032534,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 2.0525253884939474,
              "area_mm2": 3.308772876111475,
              "area_kcmil": 6.529946789032534,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 2.052,
              "area_mm2": 3.308,
              "diameter_mil": 80.8,
              "area_cmil": 6530,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 5.210693101504721,
            "resistance_ohm_per_1000_ft": 1.5882192573386391,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": {
              "60C_A": 20,
              "75C_A": 25,
              "90C_A": 30,
              "basis": "NFPA 70–style copper ampacity (educational; code edition not pinned)",
              "assurance": "code_context_required",
              "code_context_required": true,
              "educational_reference": true,
              "code_edition_not_pinned": true,
              "jurisdiction_usable": false,
              "source_family": "NFPA_70",
              "table_like": "310.16",
              "edition": null,
              "material": "copper",
              "condition": {
                "current_carrying_conductors": "not_more_than_three",
                "ambient_correction": false,
                "bundling_adjustment": false,
                "wiring_method": "not_specified",
                "termination_temperature": "not_specified"
              },
              "note": "Thermal ampacity reference ≠ permitted branch-circuit rating. Educational NFPA 70–style values (table-like 310.16); not an adopted code edition and not jurisdiction-usable. No ambient or bundling derating. Confirm conductor type, termination temperature, and local code (NEC 240.4(D) often limits 14/12/10 AWG copper OCPD to 15/20/30 A)."
            }
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "g-36",
        "reference": {
          "value": 0.127,
          "unit": "mm",
          "gauge": "36",
          "gauge_n": 36,
          "geometry": {
            "diameter_mm": 0.127,
            "area_mm2": 0.012667686977437443,
            "area_kcmil": 0.025
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 1361.0219474721894,
            "resistance_ohm_per_1000_ft": 414.83948958952334,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 0.127,
          "unit": "mm",
          "gauge": "36",
          "gauge_n": 36,
          "geometry": {
            "diameter_mm": 0.127,
            "area_mm2": 0.012667686977437443,
            "area_kcmil": 0.025,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 0.127,
              "area_mm2": 0.012667686977437443,
              "area_kcmil": 0.025,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 0.127,
              "area_mm2": 0.0127,
              "diameter_mil": 5,
              "area_cmil": 25,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 1361.0219474721894,
            "resistance_ohm_per_1000_ft": 414.83948958952334,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": null
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "g-4-0",
        "reference": {
          "value": 11.684,
          "unit": "mm",
          "gauge": "4/0",
          "gauge_n": -3,
          "geometry": {
            "diameter_mm": 11.684,
            "area_mm2": 107.2193025770305,
            "area_kcmil": 211.6
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 0.1608012697864118,
            "resistance_ohm_per_1000_ft": 0.04901222703089832,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 11.684,
          "unit": "mm",
          "gauge": "4/0",
          "gauge_n": -3,
          "geometry": {
            "diameter_mm": 11.684,
            "area_mm2": 107.2193025770305,
            "area_kcmil": 211.6,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 11.684,
              "area_mm2": 107.2193025770305,
              "area_kcmil": 211.6,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 11.68,
              "area_mm2": 107.2,
              "diameter_mil": 460,
              "area_cmil": 211600,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 0.1608012697864118,
            "resistance_ohm_per_1000_ft": 0.04901222703089832,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": {
              "60C_A": 195,
              "75C_A": 230,
              "90C_A": 260,
              "basis": "NFPA 70–style copper ampacity (educational; code edition not pinned)",
              "assurance": "code_context_required",
              "code_context_required": true,
              "educational_reference": true,
              "code_edition_not_pinned": true,
              "jurisdiction_usable": false,
              "source_family": "NFPA_70",
              "table_like": "310.16",
              "edition": null,
              "material": "copper",
              "condition": {
                "current_carrying_conductors": "not_more_than_three",
                "ambient_correction": false,
                "bundling_adjustment": false,
                "wiring_method": "not_specified",
                "termination_temperature": "not_specified"
              },
              "note": "Thermal ampacity reference ≠ permitted branch-circuit rating. Educational NFPA 70–style values (table-like 310.16); not an adopted code edition and not jurisdiction-usable. No ambient or bundling derating. Confirm conductor type, termination temperature, and local code (NEC 240.4(D) often limits 14/12/10 AWG copper OCPD to 15/20/30 A)."
            }
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "g-0",
        "reference": {
          "value": 8.251462802171464,
          "unit": "mm",
          "gauge": "1/0",
          "gauge_n": 0,
          "geometry": {
            "diameter_mm": 8.251462802171464,
            "area_mm2": 53.47512073211765,
            "area_kcmil": 105.5345005512111
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 0.32241161429757925,
            "resistance_ohm_per_1000_ft": 0.09827106003790216,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 8.251462802171464,
          "unit": "mm",
          "gauge": "1/0",
          "gauge_n": 0,
          "geometry": {
            "diameter_mm": 8.251462802171464,
            "area_mm2": 53.47512073211765,
            "area_kcmil": 105.5345005512111,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 8.251462802171464,
              "area_mm2": 53.47512073211765,
              "area_kcmil": 105.5345005512111,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 8.252,
              "area_mm2": 53.49,
              "diameter_mil": 324.9,
              "area_cmil": 105600,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 0.32241161429757925,
            "resistance_ohm_per_1000_ft": 0.09827106003790216,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": {
              "60C_A": 125,
              "75C_A": 150,
              "90C_A": 170,
              "basis": "NFPA 70–style copper ampacity (educational; code edition not pinned)",
              "assurance": "code_context_required",
              "code_context_required": true,
              "educational_reference": true,
              "code_edition_not_pinned": true,
              "jurisdiction_usable": false,
              "source_family": "NFPA_70",
              "table_like": "310.16",
              "edition": null,
              "material": "copper",
              "condition": {
                "current_carrying_conductors": "not_more_than_three",
                "ambient_correction": false,
                "bundling_adjustment": false,
                "wiring_method": "not_specified",
                "termination_temperature": "not_specified"
              },
              "note": "Thermal ampacity reference ≠ permitted branch-circuit rating. Educational NFPA 70–style values (table-like 310.16); not an adopted code edition and not jurisdiction-usable. No ambient or bundling derating. Confirm conductor type, termination temperature, and local code (NEC 240.4(D) often limits 14/12/10 AWG copper OCPD to 15/20/30 A)."
            }
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      },
      {
        "id": "g-56",
        "reference": {
          "value": 0.012494907352710489,
          "unit": "mm",
          "gauge": "56",
          "gauge_n": 56,
          "geometry": {
            "diameter_mm": 0.012494907352710489,
            "area_mm2": 0.00012261848950449665,
            "area_kcmil": 0.00024199068409823713
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 140606.85358033006,
            "resistance_ohm_per_1000_ft": 42856.96897128461,
            "resistivity_ohm_m": 1.7241e-8
          }
        },
        "actual": {
          "value": 0.012494907352710489,
          "unit": "mm",
          "gauge": "56",
          "gauge_n": 56,
          "geometry": {
            "diameter_mm": 0.012494907352710489,
            "area_mm2": 0.00012261848950449665,
            "area_kcmil": 0.00024199068409823713,
            "basis": "ASTM B258-18(2026) geometric progression (unrounded)",
            "standard": "ASTM B258",
            "edition": "18(2026)",
            "edition_kind": "reapproval",
            "assurance": "formula_derived",
            "range": "standard_range",
            "formula": {
              "diameter_mm": 0.012494907352710489,
              "area_mm2": 0.00012261848950449665,
              "area_kcmil": 0.00024199068409823713,
              "assurance": "formula_derived"
            },
            "standard_nominal": {
              "diameter_mm": 0.0124,
              "area_mm2": 0.000122,
              "diameter_mil": 0.49,
              "area_cmil": 0.24,
              "basis": "ASTM B258-18(2026) Table 1",
              "dataset_id": "astm_b258_table1_si_v1",
              "table": "1",
              "assurance": "standard_nominal"
            }
          },
          "electrical": {
            "material": "copper",
            "temperature_C": 20,
            "resistance_ohm_per_km": 140606.85358033006,
            "resistance_ohm_per_1000_ft": 42856.96897128461,
            "resistivity_ohm_m": 1.7241e-8,
            "assurance": "material_model"
          },
          "references": {
            "ampacity": null
          }
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "suite": "golden"
      }
    ]
  },
  "interfaces": {
    "compared": [
      "ui-ssr",
      "rest",
      "mcp"
    ],
    "result": "PASS",
    "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session. Human URL alias: /calc/wire/wire-gauge-chart?a=12&mode=awg-mm ≡ /calc/wire/awg-to-mm?awg=12&mode=awg-mm ≡ REST awg-to-mm and wire-gauge-chart ≡ MCP electrical.awg_to_mm."
  },
  "artifacts": {
    "evidence_bundle_sha256": "e438649bc2969bbd9890f8876c17bd4105dd0231cb9d1ad672ee8f28ef0bda6b",
    "evidence_digest": "42bdfb24710dd65b53230465155ec371d6665992de8bfb94cd82852ab6036309",
    "production_sha256": "0223bc7d68cc3d7efa7cd8b91d912ab6f3c1ced3be224eab0fb377f2694d8367",
    "attested_catalog_sha256": "6aa388524e8098a039686cf245640d8af3d123d895e9af1bb69052c231aa23ab",
    "production_checks": [
      {
        "id": "electrical.awg_to_mm:output-const",
        "status": "pass",
        "detail": "output const 1.5.0 vs capability 1.5.0",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:evidence-sha256",
        "status": "pass",
        "detail": "743aee4a745f",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:semantic-contract",
        "status": "pass",
        "detail": "46/46",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:capability-html-public-origin-agree",
        "status": "pass",
        "detail": "public 1.5.0 vs origin 1.5.0",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:cvp-manifest-public-origin-agree",
        "status": "pass",
        "detail": "electrical.awg_to_mm/1.5.0/2026-09-10.wire-chart-claim-boundary/engineering/42bdfb24710d",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true,
        "projection_compared": false,
        "observed_live_projection_at_attestation": "VERIFIED"
      },
      {
        "id": "electrical.awg_to_mm:cvp-latest-alias-agrees",
        "status": "pass",
        "detail": "electrical.awg_to_mm/1.5.0/2026-09-10.wire-chart-claim-boundary/engineering/42bdfb24710d",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true,
        "projection_compared": false,
        "observed_live_projection_at_attestation": "STALE"
      },
      {
        "id": "electrical.awg_to_mm:cvp-immutable-manifest-fetch",
        "status": "pass",
        "detail": "public=200 origin=200",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:cvp-immutable-manifest-sha256",
        "status": "pass",
        "detail": "42bdfb24710d",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:cvp-latest-alias-matches-immutable",
        "status": "pass",
        "detail": "electrical.awg_to_mm/1.5.0/2026-09-10.wire-chart-claim-boundary/engineering/42bdfb24710d",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true,
        "projection_compared": false,
        "observed_live_projection_at_attestation": "STALE"
      },
      {
        "id": "electrical.awg_to_mm:calculator-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      },
      {
        "id": "electrical.awg_to_mm:evidence-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attested_at": "2026-09-10T11:43:14.520Z",
        "attestation_binding_current": true
      }
    ]
  },
  "dependencies": [
    {
      "name": "awg-engine",
      "version": "1.5.0"
    },
    {
      "name": "awg-reference-oracle",
      "version": "1.0.0"
    },
    {
      "name": "node",
      "version": "20.19.2"
    }
  ],
  "attestation": {
    "status": "CURRENT",
    "href": "/.well-known/calculatorx-production-attestation.json",
    "id": "fcb416c58928cba9762ed3daca1d89d3fb31949829124a90388eca1df827099f",
    "attested_at": "2026-09-10T11:43:14.520Z"
  },
  "domain_review": {
    "status": "ABSENT",
    "spec_version": "1.5.0"
  },
  "timestamps": {
    "verified_at": "2026-09-10T07:29:42.001Z",
    "generated_at": "2026-09-10T07:29:42.001Z",
    "rendered_at": "2026-09-10T12:25:39.034Z",
    "notes": "verified_at/generated_at mark the first publication of this evidence_digest (suite verification). rendered_at is this JSON serialization and is not part of evidence_digest. Production attestation binds evidence_digest, not rendered_at. Causal order: verified_at ≤ attestation started ≤ attested_at."
  },
  "links": {
    "legacy_evidence": "https://www.calculatorx.com/evidence/electrical.awg_to_mm/1.5.0.json",
    "evidence_page": "https://www.calculatorx.com/evidence/electrical.awg_to_mm/1.5.0",
    "calculator": "https://www.calculatorx.com/calc/wire/awg-to-mm",
    "schema": "https://www.calculatorx.com/developers/cvp/schema/cvp-evidence-1.0.json",
    "protocol": "https://www.calculatorx.com/developers/cvp/spec/1.0",
    "manifest": "https://www.calculatorx.com/evidence/electrical.awg_to_mm/1.5.0.cvp.json",
    "manifest_immutable": "https://www.calculatorx.com/evidence/electrical.awg_to_mm/1.5.0/2026-09-10.wire-chart-claim-boundary.cvp.json"
  }
}