UpCodes logo
Go To Full Code Chapter
(A) General
Conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Article 220 and shall have adequate mechanical strength.
(B) Minimum Size
The conductors shall not be smaller than 8 AWG copper or 6 AWG aluminum or copper-clad aluminum.
Exception: Conductors supplying only limited loads of a single branch circuit — such as small polyphase power, controlled water heaters, and similar loads — shall not be smaller than 12 AWG hard-drawn copper or equivalent.
(C) Grounded Conductors
The grounded conductor shall not be less than the minimum size as required by 250.24(C).

Related Code Sections

230.23 Wiring and Protection, Size and Ampacity
Conductors shall have sufficient ampacity to carry the current for the load as calculated in accordance with Article 220 and shall have adequate ...
409.20 Equipment for General Use, Conductor — Minimum Size and Ampacity
The size of the industrial control panel supply conductor shall have an ampacity not less than 125 percent of the full-load current rating of all ...
409.20 Equipment for General Use, Conductor — Minimum Size and Ampacity
The size of the industrial control panel supply conductor shall have an ampacity not less than 125 percent of the full-load current rating of all ...
430.122 Equipment for General Use, Conductors — Minimum Size and Ampacity
Circuit conductors supplying power conversion equipment included as part of an adjustable-speed drive system shall have an ampacity not less than 125 ...