|
This section describes the Feeder Specification area in the distribution equipment dialog boxes. This area is used to configure the upstream feeder to the equipment. The information listed below is applicable to all distribution equipment except generators and low voltage panels unless otherwise indicated.
UPSs and transfer switches have a Normal Feeder Specification area and a Bypass Feeder Specification area. These areas correspond to the two feeders to these types of equipment. They work the same as the Feeder Specification areas in the other dialog boxes.
Training Videos
Fed From: The equipment that this equipment is connected to. It is the equipment upstream from this equipment that is closer to the utility.
Description in Upstream Device: The description used in the distribution equipment schedule where this equipment is connected. This description defaults to the equipment type and the equipment name. To override this value, check the box next to the Description in Upstream Device field and enter a new description.
Upstream OCP / Primary OCP: The trip size of the overcurrent protection (OCP) in the device upstream of the distribution equipment.
| • | Same as Main Disconnect or Bus Amps: The OCP is sized to match the Main Disconnect Amps setting. If the Main Disconnect Type is set to Main Lugs Only, the OCP is sized to match the Bus Amps.
Size to Match kVA: The OCP is sized to match the KVA setting. Applies to transformers and UPSs.
Same as TS Amps: The OCP is sized to match the transfer switch amps. Applies to transfer twitches. |
| • | Lugs or N/A: There is no OCP for this device. No breaker size is listed in the upstream panel. The feeder is sized based upon the Same as Main Disconnect or Bus Amps setting. |
| • | Specific Breaker Size: The OCP is set to the specific size chosen from the list. |
Set Curve: Press this button to configure the curve for the upstream OCP. The Select Curve dialog box will appear. If Upstream OCP is set to Size to Match kVA or Lugs or N/A, this button is disabled.
Frame Amps: The frame size of the overcurrent protection (OCP) in the device upstream of the distribution equipment.
| • | Same as Main Disconnect or Bus Amps: The frame is sized to match the Main Disconnect Amps setting. If the Main Disconnect Type is set to Main Lugs Only, the frame is sized to match the Bus Amps.
Size to Match kVA: The frame is sized to match the KVA setting. Applies to transformers and UPSs.
Same as TS Amps: The frame is sized to match the transfer switch amps. Applies to transfer switches. |
| • | Lugs or N/A: There is no frame for this device. No breaker size is listed in the upstream panel. The feeder is sized based upon the Same as Main Disconnect or Bus Amps setting. |
| • | Specific Breaker Size: The frame is set to the specific size chosen from the list. |
Conductor Amps: Sets the size of the hot wires in the feeder.
| • | Size Automatically: The hot wires are sized based upon the Upstream OCP setting. |
| • | Specific Breaker Size: The hot wires are sized to match the breaker size chosen from the list. |
Neutral: Sets the size of the neutral wire in the feeder.
| • | Same as Phase: The neutral wire is the same size as the phase wires as specified in the Conductor Amps field. |
| • | Double Phase: The neutral wire is twice the size of the phase wires as specified in the Conductor Amps field. This is accomplished by using two neutral wires. |
| • | None: No neutral wire is included in the feeder. |
| • | Specific Breaker Size: The neutral wire is sized to match the wire size chosen from the list. |
Ground: Sets the size of the ground wire in the feeder.
| • | NEC 250.122: The ground wire is sized based upon the Equipment Ground setting for the ampacity specified in the Upstream OCP field. |
| • | NEC 250.102: The ground wire is sized based upon the Service Ground setting for the ampacity specified in the Conductor Amps field. |
| • | None: No ground wire is included in the feeder. |
| • | Specific Breaker Size: The ground wire is sized to match the wire size chosen from the list. |
IG Conductor: Whether the feeder includes an isolated ground.
Conduit Size: Sets the size of the conduit for the feeder. The conduit fill percentage is displayed next to the Conduit Size field. Changing the conduit size will update the fill percentage.
| • | Size Automatically: The conduit is sized automatically based upon the wires in the feeder. All conduits are sized using a 40% conduit fill (NEC Table 1). |
| • | None: No conduit is included for the feeder. |
| • | Specific Breaker Size: The conduit is sized to match the conduit size chosen from the list. |
Size: The callout for the feeder listing all of the chosen wire sizes. This callout can be displayed on various schedules and on the one-line diagram.
|