Multiple Feeds and Loops

The ArcFM Upstream and ArcFM Upstream Protective Device traces both trace electric lines toward their source. Multiple feeds and loops affect the results of these traces. This page defines multiple feeds and loops, and describes how the ArcFM trace tasks handle them.

Multiple Feeds

Features that have two potential sources of electricity are part of a multiple feed circuit. In the image below, the features are fed by two circuit source features. You can identify the multiple-feed situation by the affected features' Feeder Manager 2.0 fields. The Number of Feeders field displays 2 and Feeder IDs field lists both Feeder IDs affecting the switches.

Feeder Manager 2.0 opens up a few possibilities to visualize multi-fed features:

  • Use the Feeder QA rules provided in Feeder Manager 2.0 to find and select all multi-fed features.

  • Turn on the Flow Direction. Multi-fed features show a dot, as opposed to a directional arrow.

  • In the Stored Display, create a layer that is symbolized by the Number of Feeders field for all conductors and devices.

    IMPORTANT: Symbolizing by Feeder Manager 2.0 fields can be helpful. But, for performance considerations, it is recommended only as a part of a QA process, not as a standard symbol set for an asset map.

Loops

A loop occurs when a conductor feeds back into itself. When using any electric tracing tools, if any paths, upstream or downstream, discovered by the traces contain features belonging to a loop, then all features in the loop will be included in the results.

Feeder Manager 2.0 opens up a few possibilities to visualize loops:

  • Use the Feeder QA rules provided in Feeder Manager 2.0 to find and select all multi-fed features.

  • Turn on the Flow Direction. Looped features show a dot, as opposed to a directional arrow.

  • In the Stored Display, create a layer that is symbolized by the Loop field for all conductors and devices.

    IMPORTANT: Symbolizing by Feeder Manager 2.0 fields can be helpful. But, for performance considerations, it is recommended only as a part of a QA process, not as a standard symbol set for an asset map.

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