2011

■ Automatically calculate or recalculate suggested wire sizes in the Wire Size
Lookup
on page 712 dialog box as various parameters and de-rating factors
are applied.
The wire ampacity tables use the following naming convention:
■ AMP - the table name prefix.
■ _{type} - the wire metal type such as CU for copper, or AL for aluminum.
■ _{size} - wire size standard such as AWG, or MM2 for metric.
■ _{standard} - optional suffix to relate it to a specific electrical standards
code. For example, an “_NEC” suffix could mean that the data for the table
parallels the National Electrical Code. A suffixed table name is not necessary
unless you plan to set up the electrical standards database to support
multiple standards.
For example, a table named AMP_CU_AWG_NEC contains the wire ampacity
information for copper, AWG sizes, and parallels what is found in the National
Electrical Code.
DescriptionName
Wire size code. This value can be automatically pushed into a wire type layer
name. For example, “12”, “250KCMIL”.
SIZE
Wire size description shown on the Wire Size Lookup dialog box. For example,
“12 AWG”, “250 KCMIL”.
SIZE_DESC
Imperial cross-section value for the wire conductor size.CIRC_MIL
Maximum ampacity rating values for the wire conductor size for each of these
standard ambient temperature ratings. Additional columns can be added or an
60C, 75C, 90C
existing column can be deleted. For example, if local electrical codes do not
support 90C, this field can be removed from the table and does not show up
as an option in the Wire Size Lookup dialog box.
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