Lines

Figure 1: Auto Design Options - Lines

Option Descriptions
Option Description

Tap Rule Length (ft)

Length of the conductor from tapping point to downstream protective device that does not need to be protected by a protective device.

When choosing cables, assume

Select one of the options below. Design for both systems can be specified in the design library.

  • 3-Phase -- 3-Wire: Only phase and ground conductors are sized for selected cables.
  • 3-Phase -- 4-Wire" Phase, neutral and ground conductors are sized for selected cables. The neutral gets the same size as the phase.

Default Cable Length (ft)

The Auto Design feature automatically enters the default cable length if the cable length is not already specified.

Sizing Lines Protected by SSTs

Size based on tap/plug rating: Cables are sized based on upstream breaker rating, which is defined by the sensor tap or the rating plug of the solid state trip.

Size based on adjusted LTPU: If the upstream solid state trip has an adjustable long time pickup (LTPU) setting, then sizing cable based on the LTPU amps can enable you to economize on cable size.

Next: Auto Design Options

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