The correct answer isB. UnderNEMA ICS 2for motor controllers and combination starters, the required provision forpadlockingis associated with theexternal operating handle. This arrangement allows the disconnecting means or operating mechanism to be secured in the desired position, typically for safety isolation and lockout purposes during maintenance or inspection. It is a functional safety feature tied directly to operation of the controller, not merely to enclosure access.
The other options are not the standard requirement in this context. Padlocking thedoor,wireway, orrear doormay be used in some installations for security or restricted access, but those are not the specific NEMA ICS 2 provisions identified for the controller operating mechanism itself. The standard intent is to ensure that the operating handle can be locked so the equipment cannot be unintentionally operated while personnel are working on or near it.
From an API source inspection perspective, this falls under verification ofMCC construction details, safety features, interlocks, and compliance with applicable referenced standardsduring shop inspection and quality surveillance. Therefore, the correct answer ison the external operating handle, which makesoption Bthe verified answer.