Yes, there are industry standards and regulations governing electrical connection and wiring maintenance in HVAC systems. The National Electric Code (NEC) and the International Electrotechnical Commission (IEC) provide guidelines for electrical installation and maintenance, including HVAC systems. Additionally, organizations like ASHRAE and NADCA offer standards and guidelines for HVAC system design, installation, and maintenance, including electrical connections and wiring. Facility managers and HVAC professionals should familiarize themselves with these standards and regulations to ensure compliance and safe system operation.