If we bond the ground wire to the neutral in the sub-panel, current will flow on both the neutral AND on the ground wire. Which means that if you do not keep the ground wires separate from the neutral wires, you will be allowing return currents to flow on the ground wires back to the main panel.Click to see full answer. Also asked, why do you separate grounds and neutrals in a subpanel?The neutral wire carries current. So bonding the neutral to the ground in a subpanel will allow current to flow over the ground wire back to the main electrical panel. So bonding the neutral to the ground in a subpanel will allow current to flow over the ground wire back to the main electrical panel.Subsequently, question is, do sub panels need to be grounded? The neutral and ground MUST NOT be bonded at a sub-panel. They should only be bonded at the main service panel. The ground wire from the house must be connected to the sub-panel ground. Since it is a detached building the ground rods are also required by code and should be tied to the sub-panel ground. Likewise, how do you separate neutral and ground in main panel? If the main service panel happens to be the same place that the grounded (neutral) conductor is bonded to the grounding electrode, then there is no problem mixing grounds and neutrals on the same bus bar (as long as there is an appropriate number of conductors terminated under each lug).Can I hook neutral to ground?No, the neutral and ground should never be wired together. This is wrong, and potentially dangerous. When you plug in something in the outlet, the neutral will be live, as it closes the circuit. If the ground is wired to the neutral, the ground of the applicance will also be live.
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