Quick Answer
Upgrade existing systems when a component fails, a system upgrade is planned, or when the system is more than 15 years old, as NEC 690.12 requires compliance for new installations and significant upgrades.
Understanding the Compliance Deadline
The National Electric Code (NEC) 690.12 compliance is crucial for safe off-grid and solar systems. When a significant upgrade is planned, it’s essential to consider the compliance requirements. A system upgrade is considered significant if it involves replacement of 50% or more of the system’s components.
Identifying Non-Compliant Systems
Systems installed before 2008, or those with missing or inadequate rapid shutdown (RSD) functionality, require upgrade or modification to meet NEC 690.12 compliance. RSD systems are designed to limit the system voltage to 30V (60V for DC-DC converters) within 30 milliseconds in the event of a fault or disconnect. This feature is critical for preventing electrical shock and property damage.
Upgrading Existing Systems
If a component fails, it’s an excellent opportunity to upgrade the entire system to comply with NEC 690.12. When upgrading, consider the following best practices: 1) upgrade to a RSD-compliant controller or inverter, 2) ensure the system is configured to meet the RSD requirements, and 3) verify the system’s functionality and performance after the upgrade.
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