from Mike Holt question and answer: 2002
110.14(A) states "Terminals for more than one conductor shall be so identified." When looking at the manufacturer's label inside the panel, you may see it lists 2 or 3 conductors per terminal for the equipment ground, but it does not list multiple conductors for the neutral. Section 408.21 in the 2002 NEC specifically states, "Each grounded conductor shall terminate within the panelboard in an individual terminal that is not also used for another conductor."
Ready to take an electrical exam? For over 40 years we have been designing electrical exam preparation products that work. Choose one of our best-selling products and get the skills, the knowledge and the confidence you need to pass your exam.
www.mikeholt.com
110.14 (A) from 2017 says Terminals for more than one conductor shall be so identified.
110.14(a) from 1987 says Terminals. Connection of conductors to terminal parts shall ensure a thoroughly good connection without damaging the conductors and shall be made by means of pressure connectors (including set-screw type), solder lugs, or splices to flexible leads. Terminals for more than one conductor and terminals used to connect aluminum shall be so identified.
I checked 408.21 in 2014 and 2017. it does not exist. (goes from 408.20 to 408.22)
I checked 408.21 from 1987. it does not exist. (stops at 402.12 then goes to 410)
Wonder if neutral/ground under one lug was permissible. ???
I will go out to shed tomorrow to check other issues.