Can high-voltage cables without guarding be included in the same raceway as low-voltage cables?
No. 30 C.F.R. 75.807 requires underground high-voltage cables to be placed to prevent contact with low-voltage circuits. One way to prevent contact is to install a guard between the low-voltage cable and the high-voltage cables. The guarding must be grounded metal or reinforced non-conductive flame-resistant material.
