Short Span trays, often used for non-industrial indoor installations, are typically supported every 6 to 8-feet, while Intermediate Span trays are typically supported every 10 to 12-feet. The safety of your people and the reliability of your electrical system depend on proper cable tray support spacing. Here's what you need to know: Cable Types: Only use. This guide covers the critical steps, from selecting the right electrical cable tray and performing accurate cable fill calculations to managing a safe cable pull through and ensuring all bonding and grounding requirements are met. The system designer (engineer) who has access to the local building codes, the building design, equipment specification and location, and the clearances. The spacing between trays, whether horizontal or vertical, depends on various factors like cable type, environment, and tray material. It also demonstrates how Eaton's solutions and services can help: As an industry leader in cable tray, Eaton offers one of the widest ranges of.