# Cable Tray Sizing Report
**Generated:** 01/08/2026, 13:37:17

## Input Parameters
| Parameter | Value |
|---|---|
| Tray type | ladder |
| Tray width × height | 300 × 75 mm |
| Number of cables | 24 |
| Cable diameter | 22 mm |
| Cable size | 120 mm² |
| Insulation | XLPE |
| Load current | 200 A |
| Ambient temperature | 35 °C |
| Sun exposed | No |

## Results
| Metric | Value |
|---|---|
| Tray area | 22500 mm² |
| Fill area | 9123 mm² |
| **Fill %** | **40.5%** (limit 50%) |
| Fill check | ✅ PASS |
| Bundle derating | 0.4 |
| Temperature derating | 0.94 |
| Sun derating | 1 |
| **Total derating** | **0.38** |
| Base ampacity (ref cable) | 530 A |
| Derated ampacity per cable | 201.4 A |
| **Total derated ampacity** | **4833.6 A** |
| Ampacity check | ✅ PASS |

## Recommendations
- ⚠️ **WARNING** Bundle of 24 cables — derating factor 0.40. Consider dividing across multiple trays or using larger tray width.

## Standards
- IEC 60364-5-52 Table 52-2: Fill factors for cable trays
- IEC 60364-5-52 Table 52-14: Temperature derating factors
- IEC 60364-5-52 Table 52-17: Bundle derating factors
- NEC Article 392: Cable tray fill requirements