Final answer:
Cables are sometimes run in steel conduit in high frequency environments to prevent EMI (Electromagnetic Interference).
Step-by-step explanation:
In a high frequency environment, cables are sometimes run in steel conduit in order to prevent EMI (Electromagnetic Interference). The steel conduit acts as a shield, blocking external electromagnetic signals from interfering with the signals carried by the cables. This helps maintain the integrity and quality of the data or signals being transmitted through the cables.