How many cables fit in your conduit? Enter your conduit size and cable types to calculate fill percentage and check compliance with AS/NZS 3000 and BS 7671.
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Max 40% fill for more than 2 wires (AS/NZS 3000 / BS 7671)
Per AS/NZS 3000 and BS 7671: maximum 40% fill for 3 or more cables, 31% for 2 cables, and 53% for 1 cable. This ensures adequate heat dissipation and allows for easy cable pulling.
A 25mm PVC conduit can typically fit 3-4 runs of 2.5mm\u00B2 TPS 2C+E cable at the 40% fill limit. The exact number depends on the cable outer diameter.
The 40% fill limit ensures adequate air space around cables for heat dissipation, prevents excessive friction during cable pulling, and reduces the risk of cable damage during installation.
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