Attachment 03 - Wire Sizing Calculation.pdf
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- B1947 Install Outlets
- Solicitation number
- FA480325R0017
About this file
This document is a Southwire Re3™ Building Wire Selector Calculator that provides detailed electrical specifications for wire selection. The calculator outputs recommended wire specifications for a specific electrical installation scenario with the following key parameters: indoor location, in-conduit installation, copper conductor, 120 volts, 20 amps, 100-foot run length, and a maximum voltage drop of 5%.
The results recommend a 10 AWG wire size with compatible cable types including THHN/THWN(-2) and XHHW-2, which have a 30 amp rated ampacity, 1.1417 ohms resistance per 1000 feet, and a 3.50% voltage drop. The document includes multiple specific wire part numbers from Southwire, with variations in jacket type (SIMPull, Silicone Free), strand configuration (solid or stranded), and color options. A disclaimer notes that these recommendations are general interpretations of electrical codes and standards, and final product approval requires consultation with a licensed electrician and local Authority Having Jurisdiction (AHJ).
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Text version
Southwire Re3™ Building Wire Selector Calculator
Inputs:
Location: Indoor
In Conduit?: Yes
Conductor: Copper
Voltage (volts): 120
Current (amps): 20
Run Length (feet): 100
Maximum Voltage Drop (%): 5%
Results:
Size
10 AWG
Cable Types
THHN/THWN(-
2)
XHHW-2
Electrical Details
30 Amps rated ampacity of selected conductor
1.1417 Ohms resistance (Ohms per 1000 feet)
0.05 Ohms reactance (Ohms per 1000 feet)
.9 Power Factor
3.50% Voltage Drop Percentage
4.2 Actual Voltage Drop (volts)
Spec Part Number Type Jacket Strands Conductors Ground Shape Outer Color 10000 580203 THHN/THWN(-2) SIMPull Solid 1 NA Round Black, other colors available
10000 580221 THHN/THWN(-2) SIMPull 19 1 NA Round Black, other colors available
10003 115956 THHN/THWN(-2) Silicone Free Solid 1 NA Round Black, other colors available
10003 229732 THHN/THWN(-2) Silicone Free 19 1 NA Round Black, other colors available
10005 112946 XHHW-2 Silicone Free 7 1 NA Round Black, other colors available
10005 137240 XHHW-2 Silicone Free Solid 1 NA Round Black, other colors available
DISCLAIMER
The recommendations are based on Southwire’s general interpretations of the latest codes & standards including NFPA 70® NEC® and UL standards. It is the sole responsibility of a Licensed Electrician and the discretion of the local AHJ (Authority Having Jurisdiction) to approve products for a site-specific installation. There might be local regulations or unique conditions that might limit the product use. As a result, our responses above are for reference only. We advise the end users to consult with a licensed electrician and the AHJ before purchasing and installing any Southwire products.
The voltage drop calculator is applicable only to NEC applications and is designed for applications using AWG and KCMIL sizes only. It does not optimize conductor sizes for several different loads at various points in a circuit. The total combined load and length of the circuit must be used. Consult with an engineer if your application does not fit into one of the following categories and/or requires more complex engineering calculations.
Patent Pending
Attachment 03
FA480325R0017
File details come from the government source that posted it. Updated .