For wire rated at 135, what is the specified gauge range?

The specified gauge range for wire rated at 135 Amperes typically indicates that the wire needs to be sufficiently sized to handle that amount of current without overheating and while maintaining safety.

In the context of electrical wiring, gauge sizes are standardized and are inversely related to the physical diameter of the wire: the lower the gauge number, the larger the wire. For a current rating of 135 Amperes, it is necessary to select a wire gauge that can safely conduct that amount of electrical current.

The correct choice, which includes #3/0 (also referred to as 00), reflects the appropriate gauge size for such a current rating. This size is generally capable of handling high current loads, thus ensuring safety and efficiency in electrical installations. Generally, #3/0 wire is rated for a maximum of approximately 200 Amperes for certain applications, making it suitable for carrying 135 Amperes without risk of overheating.

The other gauge options provided do not adequately meet the safe current-carrying capacity needed for 135 Amperes. Therefore, the range that includes #3/0 is the most fitting for this amperage requirement.