Calculateur de Remplissage de Chemin de Câbles Gratuit
Calculez le taux de remplissage d'un chemin de câbles. Vérifiez la capacité et la conformité de votre installation de câblage.
Tray Fill
18.4 %
Tray Fill vs Tray Width
Formule
Cable Tray Fill
Fill % = (Number of Cables x Cable Area) / Tray Area x 100
NEC Article 392 limits fill for cable trays. For multiconductor cables in a solid-bottom tray, total cable area must not exceed the tray cross-section area (the depth restriction acts as the limit). A practical target of 40% fill allows room for future additions and airflow.
Exemple Résolu
20 cables (0.75 in OD) in a 12 x 4 inch tray.
- 01Tray area = 12 x 4 = 48 sq in
- 02Cable area each = pi x 0.375 squared = 0.442 sq in
- 03Total cable area = 20 x 0.442 = 8.84 sq in
- 04Fill = 8.84 / 48 x 100 = 18.4%
- 05Well within limits.
Questions Fréquentes
What fill percentage should I target?
While NEC allows higher fills, 40% is a good maximum to leave room for future cables, maintenance access, and proper heat dissipation.
Do power and signal cables share a tray?
NEC 392.20 has specific separation requirements. Generally, power and signal cables can share a tray if separated by a barrier or if certain derating conditions are met.
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