Originally Posted by Mike2401
In the main service panel, can a neutral be terminated in the equipment ground bar if there are no spaces left in the neutral bar?
Just to be certain what your talking about. If you have an added grounding bar
in the service equipment
... ie... the place where the main breaker (disconnect) is located you CANNOT
land a neutral (grounded conductor) to that grounding bar.
What I'm saying here is if you have a neutral bar or bars that are bonded together and to the metal of the panel with a main bonding jumper ... then neutrals and grounds can land on them. However if a grounding bar has been added or the panel came with one installed it will be attached directly to the metal of the panel and will not be mounted on plastic standoffs
like the neutral bar or bars.
If that is what you have you cannot land a neutral on that grounding bar. The reason is you are not allowed to use the metal of the panel to return neutral current to the service neutral via the main bonding jumper that bonds the neutral bar to the panel metal.
Here is an example