Is an equipment grounding conductor for a crane required to be a copper-insulated wire sized at not less than 10 AWG?

The requirement for an equipment grounding conductor is addressed in the National Electrical Code (NEC). For cranes, the NEC specifies that the grounding conductor must be sized according to the system's ampacity and the largest overcurrent device protecting the feeder. This does not mandate that the grounding conductor be a copper-insulated wire sized at 10 AWG for all scenarios.

In many cases, the grounding conductor is sized based on the current-carrying conductors and the specific installation requirements rather than a fixed minimum size, such as 10 AWG. Additionally, the type of crane and its operational context (permanent versus temporary, for example) can influence the grounding requirements. This flexibility means that a copper-insulated grounding conductor sized at not less than 10 AWG is not universally required, leading to the selection of "No" as the accurate answer.

Individual jurisdictions may have additional specific requirements, but these will still fall under the broader framework provided by the NEC, which does not stipulate a strict minimum size for all cases involving cranes.