Table 1 Percent of Cross Section of Conduit and Tubing for Conductors and Cables
Number of Conductors and/or Cables
Cross-Sectional Area (%)
1
53
2
31
Over 2
40
[!info] Informational Note No. 1:
Table 1 is based on common conditions of proper cabling and alignment of conductors
where the length of the pull and the number of bends are within reasonable limits.
It should be recognized that, for certain conditions,
a larger size conduit or a lesser conduit fill should be considered.
[!info] Informational Note No. 2:
When pulling three conductors or cables into a raceway,
if the ratio of the raceway (inside diameter)
to the conductor or cable (outside diameter)
is between 2.8 and 3.2, jamming can occur.
While jamming can occur when pulling four or more conductors or cables into a raceway,
the probability is very low.
