Are sign transformers covered by Article 450?

Sign transformers are not covered by Article 450, which pertains to transformers and transformer vaults. Instead, they fall into specific exceptions established within the National Electrical Code (NEC). This means that while Article 450 contains general provisions for transformers, sign transformers have their guidelines and regulations that are distinct from the standard provisions outlined for other transformer types.

The NEC recognizes that sign transformers have unique operational requirements and safety considerations due to their specific use in electrical signage, which can include neon lights and other illuminated displays. As a result, the NEC provides separate provisions for these types of transformers to ensure that they meet necessary safety standards without being confined to the generic rules that apply to all transformers. This allows for a more tailored approach to addressing the electrical needs and safety concerns associated with illuminated signs.

Understanding this distinction is essential for anyone working in electrical installations or inspection, ensuring compliance with the NEC and promoting safety in electrical systems involving signage.