When I trench my underground utilities to my detached garage I know you can't put a telephone line in the same conduit as the electrical line. But, can I put telephone, intercom, and cable TV line ,(Gotta have it!) together in the same conduit? I will trench down approximately four feet, install the water line, back fill approximately one foot, then lay all the plastic conduit for the electrical lines. Does this seem ok? I know I don't have to go down this far (frost line is 30 inches) but I feel deeper is safer. Thank you in advance. Stanley
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