Thermal Expansion and Contraction of Cable Tray
Thermal Expansion and Contraction of Cable Tray:
- A cable tray system may be affected by thermal expansion and contraction, which must be taken into account during installation.
- To determine the number of expansion splice plates you need, decide the length of the straight cable tray runs and the total difference between the minimum winter and maximum summer temperatures.
- To function properly, expansion splice plates require accurate gap settings between trays.
- The support nearest the midpoint between expansion splice plates should be anchored, allowing the tray longitudinal movement in both directions.
- When a cable tray system is used as an equipment grounding conductor, it is important to use bonding jumpers at all expansion connections to keep the electrical circuit continuous.
|MAX DISTANCE BETWEEN EXPANSION JOINTS|
|Temperature Differential (oF)||Steel (Feet)||Aluminum(Feet)|