When converting a residential building to a commercial space, it's essential to consult the National Electrical Code (NEC), specifically NFPA 70, to ensure compliance. Local building codes and ordinances may also impact the conversion process, making it crucial to check with the local city Building Inspector's office for guidance. Understanding which NEC sections apply can help address electrical safety and installation standards during the conversion. Engaging with local authorities can provide the most accurate and relevant information for the specific project. Proper adherence to these regulations is vital for a successful transition from residential to commercial use.