Wiring > Multicores

In-House Twisted Sheathed

Multicores

As well as using bought-in sheathed and shielded twisted pair multicores, it is common to assemble such multicores in-house. You can use Capital to define such in-house multicores from scratch on a new design. You can also change an existing purchased sheathed multicore (coming, for example, from an import or a synchronization) to an in-house sheathed multicore.

Figure 185 shows an example in-house twisted sheathed multicore MC7. It has two insulation layers MC7-1 and MC7-2, which form the sheath, a twisted pair MC6, and a drain wire shield SHIELD-MC7. You can hover over an insulation to see more details in a popup menu.

The system automatically names the insulations in the format Multicore name + numeric increment.

The icon for a sheathed in-house multicore is the same as a sheathed multicore without the part number.

Figure 185: In-House Twisted Sheathed Pair

Figure 186 shows the definition of the multicore in the Edit Multicores Dialog Box.

The sheath insulation layer icons display at the top of the hierarchy and specify the position of the insulation layer relative to other insulations in the same sheath, with lower numbers indicating that the layer is nearer the multicore wires.
The type of the insulation (overlap \ spiral \ space tape) and the insulation part number is displayed.

Figure 186: Multicore Definition

Insulation Layers

You define the sheath using OTI Insulation Run Codes as in Figure 187. See “Object Type Information” in the Capital Project Manager User Guide for information about creating these codes.

The maximum length for an OTI Insulation Run Code Name is 30 characters. If you exceed this, the name is not selectable in the OS Spec dropdown list on the Edit Multicore Dialog Box.

The insulation layers are not listed in the Insulations folders in the Module Browser.

Figure 187: OTI Insulation Run Codes

The codes automatically display in the OS Spec dropdown list in the Edit Multicore Dialog Box when you select In-House for a Sheathed multicore as in Figure 188.

Note

The system only displays codes made up of the Insulation Types, Overlap, Space, or Spiral tape in the OS Spec dropdown list.

Figure 188: OS Spec

Once you have calculated the insulation totals (see Harness Engineering), when you select an insulation that is defined against a sheathed in-house multicore in the browser, the system automatically highlights its path on the bundle in the diagram as in Figure 189.

Note

The system applies the insulation only on the common section up to the divergence points.

Figure 189: Insulation Path Highlighted

The system reports tape used for the sheath in the BOM table and Multicore table, see Figure 190 and Figure 191. The system does not report such tapes in the Insulation table.

Figure 190: BOM Table

Figure 191: Multicore Table

Nesting

An in-house twisted sheathed multicore can only contain the following:

One or more twisted multicores at the same (first) nested level.
Insulations to form the sheath.
Wires.
Shield.

The following examples show valid and invalid nested structures for in-house twisted sheathed multicore:

Figure 192 shows a valid in-house sheathed multicore structure made up of an in-house twisted pair, a drain wire and one layer of insulation.

Figure 192: Example 1 - Valid

Figure 193 shows a valid in-house sheathed multicore structure made up of a bought in twisted pair, a drain wire, and one layer of insulation.

Figure 193: Example 2 - Valid

Figure 194 shows a valid in-house sheathed multicore structure made up of an in-house twisted pair and a bought in twisted pair (both at the same first nested level), a drain wire, and one layer of insulation.

Figure 194: Example 3 - Valid

Figure 195 shows an invalid in-house sheathed multicore structure. It is invalid because it has two levels of nesting, you cannot nest a twisted multicore inside another twisted multicore.

Figure 195: Example 4 - Invalid

Figure 196 shows an invalid in-house sheathed multicore structure. It is invalid because you can not nest a sheathed multicore inside an in-house twisted sheathed multicore.

Figure 196: Example 5 - Invalid

Copy

and Paste

The sheath insulations are included when you copy and paste in-house twisted sheathed multicores. See also “Copy Paste and Duplicate Objects”.

If you include bundles in the copy, the common section is updated automatically on the copied multicore insulation.
If you only copy the multicore, its common section (start/end nodes) is set when harness processing is invoked.

Regenerate

Multicore Insulation

The OTI insulation codes may change after you instantiate them on a multicore. You can regenerate them by right-clicking the multicore in the browser and selecting Regenerate Multicore Insulation. This action updates the insulations codes to reflect the current values as defined in OTI.

Figure 197: Regenerate Multicore Insulation

Processing

See the Harness Engineering topic for details about how the system processes multicore length, bundle diameter and insulation quantities for in-house twisted sheathed multicores.

Parent Topic:

Multicores