Can Power and Control Cables Share the Same Tray? Yes, if properly separated and compliant with voltage classification rules. How Full Can a Cable Tray Be? Fill limits vary, but keeping trays at 50% capacity is a best practice. Are PLTC Cables Approved for Tray Use? Yes. A common question arises: Can power cables and instrumentation/communication cables be run in the same cable tray? This article explores technical standards, safety considerations, and best practice. Technical Standards and Regulations NEC (National Electrical Code) Article 300. The flexibility and scalability of cable trays make them an ideal choice for environments where cable density and organization can. Maintaining proper separation between power, data, and limited energy cabling is foundational to system performance, safety, and code compliance. Separation isn't just an EMI precaution — it protects signaling, reduces rework, and ensures pathways meet inspection expectations across risers. I have surveyed a site where power wiring and data wiring share the same 18inch cable tray mounted above the racks in an article 645 space (with no raised floor?). The power wiring is type 'TC' cable, but the data wring is un-marked. Surface Raceway, EMT Conduit EMT Conduit Sizing Chart Cable Tray – B-Line Products No. association representing the major electrical equipment manufac-turers in the U. The Cable Tray ng standards, performance standards, test standards and application in this document have been tested extens ompetent professional en completely installed, without damage either to conductors or.