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Looking for an ISA source or standard to reference concerning the separation of analogue, discrete, and communications cabling from 120 VAC and higher voltage cabling as well as co-mingling within the instrument and controls realm. NEC calls out Classifications which can be referred to however the verbiage in the NEC Code Book has caused considerable debate between Engineer, and Contractor. My typical note on the first sheet of a drawing set: "Keep 4-20mA Analogue wiring, 24 VDC Discrete Control Wiring, 120 VAC wiring and Power Cabling in separate conduits and raceways. Dedicated conduits and raceways must be provided. Keep Intrinsically Safe wiring in separate conduits and raceways from all other wiring." This is the truncated version for simplicity. Additionally, in the drawing set distances between conduits and raceways are called out. Look forward to hearing back from fellow readers if a reference is available to list in the design document specifications and drawings.
Thank You.
Thank You.