When can bushings replace boxes or terminals at raceway exits?

Bushings can replace boxes or terminals at raceway exits specifically when they are connected to open switchboards or similar equipment. This is because bushings serve as protective devices that allow conductors to pass through metal enclosures safely while preventing damage to the conductors. In applications involving open switchboards, where space is often limited and the installation needs to maintain high safety standards, using bushings helps to minimize the hazards associated with exposed conductors.

Open switchboards and similar equipment often require a neat and organized method of entry for electrical conductors. Bushings provide a means to protect these conductors from mechanical damage and environmental factors, making them suitable for this specific situation. This approach helps maintain the integrity of the electrical system and ensures compliance with safety regulations.

In contrast, other scenarios like connecting to residential circuits may not necessitate the use of bushings in this way, as they typically involve junction boxes and terminals designed specifically for those applications. Similarly, while conductors inside insulation or lacking options may suggest other considerations, they do not directly relate to the specific function and use of bushings in open switchboard connections.