Section 125.33 - Location of Cables(1)Accessibility. Cables in manholes shall be reasonably accessible to workmen and clear working space shall be maintained at all times.(2)Separation Between Conductors.(a)Cables of Different Voltages. Cables shall be arranged and supported in ducts and manholes so that those operating at higher voltages will be separated as far as practicable from those operating at lower voltages.(b)Cables of Different Systems. Cables belonging to different systems, particularly supply-distribution and communication systems, shall not be installed in the same duct.