Two cables conduit fill maximum?

Two cables conduit fill maximum?

• A. 31%
• B. 40%
• C. 53%
• D. 60%

Answer: (A)

Conduit fill is about how much of the conduit’s interior cross-sectional area can be occupied by conductors. For two cables, the geometry of packing two round cables inside a circular conduit yields a practical maximum fill of about 31%. That means you should not count more than roughly one-third of the conduit’s area for the two cables, leaving space for insulation, heat dissipation, and spacing. So, the best choice reflects this conservative packing limit: two cables in a conduit can occupy around 31% of the cross-section.

Conduit fill is about how much of the conduit’s interior cross-sectional area can be occupied by conductors. For two cables, the geometry of packing two round cables inside a circular conduit yields a practical maximum fill of about 31%. That means you should not count more than roughly one-third of the conduit’s area for the two cables, leaving space for insulation, heat dissipation, and spacing. So, the best choice reflects this conservative packing limit: two cables in a conduit can occupy around 31% of the cross-section.