I believe the A1, 3 PVC column (14.5 Amps) should be: A1, 2 PVC column (13.5 Amps)
See: IEC 60364 Part 5-52 Table B.52.2 (Two-Loaded Conductors) IEC 60364 Part 5-52 Table B.52.4 (Three-Loaded Conductors)
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