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The values are entered in the Motor Setup section. A default wire size,
based on the load for the motor, is selected and shown in the Wire Setup
section.
12
In the Setup & Annotations: Wire Setup section, select the Browse
button.
The Wire Size Lookup dialog box displays. The minimum wire size is
preselected. The size is based on the load for the selected motor.
NOTE
When Show all is on, wires where the %Ampacity value is greater than
100% and less than 300%, are shown in red.
The values in the Load section are populated with the values from the
Motor Setup. The options available within this dialog box are defined in
the electrical standards database file,
ace_electrical_standards.mdb
.
13
In the Wire section, select Wire standard:
AWG
, Type/method:
CU
,
Insulation:
THWN / 75C
.
14
In the De-rating factors section, select the
Ambient temperature correction
option.
This option directs Circuit Builder to use a de-rating factor for an elevated
ambient temperature. These values are defined in the electrical standards
database file.
15
Select
36~40C
from the drop-down list.
The de-rating factor is extracted from the electrical standards database
file and entered in the dialog box. The wire size grid is adjusted based on
the new total de-rating factor. Based on this de-rating factor the minimum
wire size can change.
16
Select the
Run distance
option.
This option directs Circuit Builder to consider the length of the wire run
in the voltage drop calculation. Additional columns display in the wire
selection grid showing Voltage drop, wire KW loss, and wire loss cost
estimate.
17
Select
200
from the drop-down list.
Circuit Builder displays parallel energy loss calculations to allow you to
make better green design decisions. For example, you can oversize the
conductors for a motor to reduce conductor heating losses. It results in
a higher initial cost, material, and installation labor, which is recovered
96 | Chapter 5 Circuitry
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