First, select Edit / Setup NESC rules on the menu.

Next, click the (+) icon to the right of any group of tabs. On the popup select NESC Ground Clearance Preset under the Reports section:

The NESC Ground Clearance Preset report will be displayed:

The two poles at the ends of a conductor

Neara can infer the surface that the conductor is crossing by considering nearby feature points. To add features points you can either import a survey file or use the terrain tool to add in feature points manually.

The user can enter in different surfaces to override the preset ground surface. Note that surfaces can be (in lower case):

The software will determine the surface min-height based on what the surface has been defined as. This can be changed by clicking on the settings (gear) icon under the column header.

The surface name and minimum clearance requirement are defined in the following format respectively:

Copy and paste this underneath the existing water surface rule to create your own one or make changes to the existing rules if required.

Conductor classes with their respective cable rule are as follows:

"ELEC_BARE" - L3

"ELEC_INS" - L3

"TPX" - L2

"communications" - L1

"neutral" - L1

You can edit the conductor class of a conductor by selecting library from the menu bar at the top and selecting conductors. You will then be able to click on the class field of any conductors and enter in a conductor class label to define it.

You can also add in and define additional conductor classes and cable rules be selecting the settings (gear) icon underneath the cable rule column header in the NESC table.

Add in your additional cable rules by adding in your conductor class and relevant cable rule in the following format "conductor class", "cable rule" below the TPX rule.

The cables extra clearance value has been derived from the cable rule. Select the settings cog to adjust your cable extra clearance values manually.

The required clearances value is a sum of:

This is the value of the minimum ground clearance of your existing conductors.

This field determines whether your conductor passes or fails the required clearance.