AS/NZS 3008.1.1:2025
Table 3.35
Correction factors for multicore cables on trays, ladders, racks and cleats in air
On the 2025 edition, the cable size and correction factors tools read this table for multicore cables on a tray, a ladder, a rack or cleats. The DC cable size tool reads it for 2‑core cables. The values print the same as in 2017.
Verified: read against the printed standard, pages 75. Checked 27 Sept 2026.
Units: Tiers count, Count cables per tier or row
These are the values AmpSize encodes. No text of the standard is reproduced. Verify against the current standard.
22 rows
| Item | Installation | Spacing | Tiers (count) | Factors |
|---|---|---|---|---|
| 1 | unperforated-trays | touching | 1 | 0.97, 0.85, 0.78, 0.75, 0.71, 0.68 |
| 2 | unperforated-trays | touching | 2 | 0.97, 0.84, 0.76, 0.73, 0.68, 0.63 |
| 3 | unperforated-trays | touching | 3 | 0.97, 0.83, 0.75, 0.72, 0.66, 0.61 |
| 4 | unperforated-trays | spaced | 1 | 0.97, 0.96, 0.94, 0.93, 0.9, — |
| 5 | unperforated-trays | spaced | 2 | 0.97, 0.95, 0.92, 0.9, 0.86, — |
| 6 | unperforated-trays | spaced | 3 | 0.97, 0.94, 0.91, 0.89, 0.84, — |
| 7 | perforated-trays | touching | 1 | 1, 0.88, 0.82, 0.78, 0.76, 0.73 |
| 8 | perforated-trays | touching | 2 | 1, 0.87, 0.8, 0.76, 0.73, 0.68 |
| 9 | perforated-trays | touching | 3 | 1, 0.86, 0.79, 0.75, 0.71, 0.66 |
| 10 | perforated-trays | spaced | 1 | 1, 1, 0.98, 0.95, 0.91, — |
| 11 | perforated-trays | spaced | 2 | 1, 0.99, 0.96, 0.92, 0.87, — |
| 12 | perforated-trays | spaced | 3 | 1, 0.98, 0.95, 0.91, 0.85, — |
| 13 | ladder-supports-racks-cleats | touching | 1 | 1, 0.87, 0.82, 0.8, 0.79, 0.78 |
| 14 | ladder-supports-racks-cleats | touching | 2 | 1, 0.86, 0.8, 0.78, 0.76, 0.73 |
| 15 | ladder-supports-racks-cleats | touching | 3 | 1, 0.85, 0.79, 0.76, 0.73, 0.7 |
| 16 | ladder-supports-racks-cleats | spaced | 1 | 1, 1, 1, 1, 1, — |
| 17 | ladder-supports-racks-cleats | spaced | 2 | 1, 0.99, 0.98, 0.97, 0.96, — |
| 18 | ladder-supports-racks-cleats | spaced | 3 | 1, 0.98, 0.97, 0.96, 0.93, — |
| 19 | vertical-perforated-trays | touching | 1 | 1, 0.88, 0.82, 0.77, 0.73, 0.72 |
| 20 | vertical-perforated-trays | touching | 2 | 1, 0.88, 0.81, 0.76, 0.72, 0.7 |
| 21 | vertical-perforated-trays | spaced | 1 | 1, 0.91, 0.89, 0.88, 0.87, — |
| 22 | vertical-perforated-trays | spaced | 2 | 1, 0.91, 0.88, 0.87, 0.86, — |