Solar Array Grounding and Surge Protection: Sizing SPDs & NEC 690 Rules
Photovoltaic arrays installed on rooftops or open fields act as massive atmospheric antennas. While a direct lightning strike will vaporize conductors regardless of protection, more than 95% of lightning-induced electrical damage stems from indirect strikes: electromagnetic pulses (EMP) and ground potential rises that induce thousands of volts of destructive transient overvoltage into DC conductor loops. … Read more