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Article 450 - Transformers and Transformer Vaults

Chapter 4 - Equipment for General UseTransformers

Transformer installation, ventilation, overcurrent protection, and vault references.

Search keywords: transformer, dry type, vault, primary, secondary

Reference rule: This card is a field index/bookmark, not the full NEC article text. Verify exact language, exceptions, tables, and local amendments against your licensed 2020 NEC and the AHJ.
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Local GIES Note / Field Interpretation

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