Which of the following is NOT part of an underground power service?

The correct answer is that the conduit riser with weatherhead is not part of an underground power service. In the context of underground power distribution, a conduit riser is typically associated with above-ground service entry, where it functions to transition from underground power lines to an overhead system. The weatherhead is utilized to protect the entry point from the elements, which is more relevant to above-ground installations.

In contrast, the components of an underground power service primarily include a disconnect housing, which provides a means to disconnect the power for maintenance or emergencies; power supply wires that carry electricity to the designated service point; and pull boxes that facilitate the pulling of wires through conduit and serve as access points for maintenance. These components are integral to ensuring the safety and functionality of an underground power system. Thus, the conduit riser with weatherhead, being more appropriate for above-ground applications, does not belong in the configuration of an underground power service.