What is typically used to provide a secure termination for conduit ducts ending in manholes?

End bells are specifically designed to serve as a secure termination for conduit ducts that come to an end in manholes. These fittings provide a way to connect the wiring within the conduit to the equipment or devices housed within the manhole. They are crucial for ensuring that the ends of the conduits are sealed properly, preventing the entry of moisture and debris, which could compromise the integrity of the electrical system.

Using end bells helps to maintain the structural and electrical safety of the installation while allowing for smooth transitions between different conduit sizes or between conduits and other types of raceways. Their design often includes features that accommodate the sealing of the conduit, ensuring that it meets the necessary codes and standards for electrical installations. This is vital for both safety and reliability in electrical systems.