What is the term for a fitting that resembles a pipe or box with a removable cover for access to electric conduit?

The term for a fitting that resembles a pipe or box with a removable cover for access to electric conduit is "condulet." Condulets are designed to provide access to electrical connections or junctions within a conduit system while maintaining the structural integrity and continuous run of the conduit. They facilitate maintenance and troubleshooting, allowing electricians to easily reach conductors without having to dismantle extensive sections of conduit.

The design of the condulet allows it to function as a junction box, providing a means to connect multiple conduits, or change direction, while also offering a removable cover that grants access for wiring and electrical maintenance. This feature is particularly useful in complex installations where numerous conductors are joined, and where regular access to these connections may be required.

The other options mentioned in the question refer to different components used in electrical installation. Conduit straps or clamps are used to secure conduit to walls or other structures, connectors serve to join sections of conduit or cables, while lock nuts and bushings are used to secure conduit fittings and protect conductors. Each of these serves a distinct purpose and does not provide the same access capability as a condulet.