An insulated grounded conductor of which size or smaller is identified by a continuous white or gray outer finish?

An insulated grounded conductor that is identified by a continuous white or gray outer finish must meet specific size requirements as defined by electrical codes. The identification of these conductors is crucial for ensuring safety and proper installation in electrical systems. In this case, the option indicating 6 AWG is significant because it aligns with the National Electrical Code (NEC) standards which stipulate that the grounded conductor (typically the neutral wire) must be marked clearly to prevent confusion during installation and maintenance.

Conductors of 6 AWG or smaller are technically permissible to be identified by these colors, as they maintain a standard that helps to ensure that electricians and anyone working with the wiring can readily recognize the grounded conductor. Larger conductors, on the other hand, often have different identification requirements in order to minimize risks associated with working around high current configurations. Thus, knowing that the smaller size, such as 6 AWG, can be properly identified in this manner is important for safe and compliant electrical work.

The emphasis on using a consistent identification system helps prevent accidents and ensures reliability in electrical installations, making 6 AWG the correct choice in this context.