According to the NEC, what is the minimum size of bonding wire?

In the context of the National Electrical Code (NEC), the minimum size of bonding wire is 14 gauge. This specification is put in place to ensure adequate conductivity and reliability for grounding and bonding applications within electrical systems. Using a wire that is too small may result in inadequate grounding which can increase the risk of electrical shock or fire.

The bonding wire serves a critical function in connecting various conductive parts to prevent dangerous voltages from appearing on accessible parts of the electrical system. A wire that meets or exceeds the minimum gauge helps facilitate effective current flow in the event of a fault condition.

In practical applications, while larger gauges may be used for specific situations or requirements, the standard minimum size for bonding wire is established at 14 gauge to uniformly address safety concerns and ensure compliance across various installations.