What type of connector is typically used with MC cables to make secure connections in boxes?

The most appropriate type of connector for making secure connections with MC (Metal-Clad) cables in boxes is the liquid-tight connector. Liquid-tight connectors are designed to provide a moisture-tight seal, ensuring that the connections remain protected from water and other contaminants, which is crucial in maintaining electrical safety and performance in applications where moisture may be present.

Liquid-tight connectors are especially important for MC cables as these cables are often used in environments where they might be exposed to water splashes or condensation. By providing a secure and tight seal, liquid-tight connectors help prevent corrosion and electrical failures that could arise from moisture intrusion.

While external connectors, insulated connectors, and compression connectors may also have their uses, they are not specifically designed to offer the same level of protection and security as liquid-tight connectors when used with MC cables.