Back

Conduit fill calculator

AS/NZS 3000:2018 — maximum 40% for 3 or more cables

Cables in conduit
28%
Fill28.5% of 25mm conduit
Cable area101mm² of 353mm² available
Maximum allowed53% (2 cables)
PASS

AS/NZS 3000:2018 — 53% max for 2 cables

Results are a guide only. Always verify against current AS/NZS standards and your network operator requirements. Not a substitute for professional engineering advice.

Need to quote this job? Generate a professional electrical quote in 2 minutes at QuoteSpark →