Originally Posted By: ecrofutt
This post was automatically imported from our archived forum.
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board. There was a recent discussion of this issue there that included the actual code reference.
On second thought, I just copied it here. It was originally copied from an electrical contractor bulletin board.
When installing new panels, I often find that there aren't enough
terminals in the neutral/ground bus bars to accommodate all the
neutrals and ground wires. Is it permissible to pigtail several
grounds with one lead from the pigtail to the bus bar?
This is the first time I've heard of running out of neutral terminal
spaces. Maybe you should run more multi-wire circuits to reduce the
number of neutral conductors or maybe you don't want to use 3-wire
cable for some reason.
Section 408.21 requires that each neutral conductor must have its
own individual terminal that is not used for another conductor, which
means that connecting more than one neutral conductor or a neutral
conductor and a grounding conductor to a neutral terminal is not
permitted. This information may be found in the UL Standard 67 for
panelboards and is required to be shown on the label in every
Since it is unlikely that more than one ground-fault will occur at
the same time it is permitted to splice equipment-grounding conductors
together and pig-tail with one properly sized conductor to the ground
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