Where are splices normally completed when underground ducts are used?

Splices in underground ducts are typically completed in a manhole. This is primarily due to the accessibility and space that manholes provide, which allow workers to perform necessary repairs or modifications safely and efficiently. Manholes are designed to facilitate access to underground systems, making it easier for maintenance crews to handle cable splicing activities without exposing the spliced connections to elements or other potential hazards.

The structure of a manhole, being in close proximity to the underground ducts, makes it an ideal location as it offers sufficient room to work and connect the cables properly while also accommodating safe entry and exit for personnel. This careful consideration for safety and operational efficiency is why splicing in a manhole is standard practice in these settings. Other locations like vaults or junction boxes may not provide the same level of accessibility or safety for performing splices in an underground installation context.