Keep in mind that there is no need to bond Ground with Neutral in the subpanel (as they are already bonded in the main panel). The subpanel is fed-up by 2-Poles, 240V breaker at the main panel via two hot wires (L1 & L2), a Neutral wire “N” and Ground wire “G”. it provides protection against surges, electric shock and other electric faults. How to Wire 240V, 208V & 120V, 1 & 3-Phase, High Leg Delta Main Panel?Ī subpanel (Remote Panel in NEC) is a smaller service panel derived from the main panel via two poles circuit breakers to securely distribute electric power to the other parts in the building, home, garage or any other specific applications in the premises.Ī subpanel does the same job as the main panel i.e.How to Wire 120V & 240V Main Panel? Breaker Box Installation.How to Size a Load Center, Panelboards and Distribution Board?. Keep in mind that the Neutral busbar terminal and Ground busbar terminal in the main panel is electrically bonded in single phase 240V & 120V electric power supply system. L1 and L2 are connected to the two poles main breaker, the Neutral is connected to the Neutral terminal in the panel box, and Ground wire is connected to the ground wire (Grounding/Earthing System). Black as Hot 1, Red as Hot 2 and White as Neutral) enters the main panel to provide 120V and 240V single phase supply voltage. In residential applications, three wires (i.e. The main panel is directly connected to the feeder cables (from the energy meter and distribution transformer mounted on the utility pole). The panel board should be accessible only from the front and installed/mounted against the wall or other solid structures.Ī main panel is the first line of defense against the electric surges and other faults ( short circuit, overload, over current etc.) which protects electrical appliances and prevents electric shock and hazardous fire. Wiring Installation of a 100A Subpanel for Only 120VĪccording to NEC (National Electric Code: Article 1 00-Definitions), a Main Panel (also known as Panelboard, load center, breaker box and distribution board etc.) is a cabinet or cutout box which contains on controlling and protective devices (such as circuit breakers, fuses, switches etc.) used to control and protect the light, heat, and power circuits.Wiring Installation of a 150A Subpanel for Only 240V.Wiring Installation of a 60A Subpanel for 120V & 240V.
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