What size equipment bond for 300 amp sub panel?

For a 300 amp sub panel, the equipment bond typically requires a bonding jumper sized according to the National Electrical Code (NEC) guidelines. Generally, a minimum of #4 AWG copper or #2 AWG aluminum is recommended for bonding conductors. However, it’s essential to consult local codes and regulations, as requirements can vary based on jurisdiction and specific installation conditions. Always ensure compliance with the latest NEC and local amendments for safety.