Why is it important to “float” the neutral in a sub panel?
If the neutral conductor is not “floated,” and instead is connected to the bonding system at a sub panel, there will be objectionable currents imposed on the bonding system. These currents can cause injury, death or fire. (“Floating neutral” means there is no electrical connection between the neutral bar and the bonding system; the neutral bar must be mounted on non-conductive spacers.) Explanation: The neutral conductor carries current back to the source (utility). When the neutral is connected to the bonding system in a sub panel, the bonding system becomes a parallel path with the neutral and shares the return current. Neutral currents will flow on the metal parts of the system and/or the equipment bonding conductor. When the current flows in parallel paths, there may not be sufficient impedance (total resistance of the path) to clear a ground fault. (Not to be confused with a ground fault as relates to a GFCI, this ground fault is an accidental connection between a hot wire and the
