Conductors for general wiring.
Municipal Code of Chicago § 14E-3-310
in effect14E-3-310 Conductors for general wiring.
The provisions of Article 310 of NFPA 70 are adopted by reference with the following modifications:
1. Insert the following language immediately before informational note no. 1 in subsection 310.15(B)(3)(a):
"No more than nine current-carrying conductors shall be permitted to be installed in a raceway other than nipples."
2. Revise table 310.15(B)(3)(a) to read:
Number of Current- Carrying Conductors | Percent of Values in Table 310.15(B)(16) through Table 310.15(B)(19) as Adjusted for Ambient Temperature if Necessary
4 – 6 | 80
7 – 9 | 70
(Amend Coun. J. 4-10-19, p. 100029, Art. VI, § 2)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2669882Fetched: 10/24/2026