Overcurrent circuits are disclosed for preventing overcurrent in shielded coaxial communication cables. A shield breaking element of an overcurrent circuit is adaptable to be coupled in series with a shield conductor of a shielded coaxial cable, and is also configured to open upon conducting a first electrical current that exceeds an overcurrent threshold, thereby preventing the first electrical current from flowing through the shield conductor of a shielded coaxial cable. A signal breaking element of the overcurrent circuit is adaptable to be coupled in series with a signal conductor of the shielded coaxial cable, and is configured to open when the shield breaking element opens thereby preventing a second electrical current from flowing through the signal conductor. Systems and devices that use the overcurrent circuits, for example, to provide alerts and status, are also disclosed.