Which type of coupler is used between SC connectors to extend the length of a cable run?

The choice of an SC coupler for extending the length of a cable run between SC connectors is based on its design and compatibility with the connectors it is meant to join. An SC coupler is specifically designed to accommodate SC connectors, ensuring proper alignment and minimal signal loss during transmission.

When two SC cables need to be joined to achieve a longer distance, using an SC coupler allows for seamless connectivity. The coupler maintains the integrity of the fiber and ensures that the light path is consistent, which is crucial for effective communication signals through the fiber optic cable.

The other types of couplers, like LC, SFF, and ST, are designed for their specific connector types and will not work effectively with SC connectors. This means they would not provide the necessary compatibility or reliability required for extending a run using SC connections. Thus, using an SC coupler is essential for maintaining the performance and quality of the fiber optic installation.