Attachment 02 - Wire Sizing Calculation.pdf
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- B1947 Install Outlets
- Solicitation number
- FA480325SS001
About this file
This is a wire sizing calculation document showing results from Southwire's Re3™ Building Wire Selector Calculator for an indoor electrical installation. The calculator provides specifications for a 120-volt, 20-amp circuit with a 100-foot run length and maximum 5% voltage drop requirement.
The calculator recommends 10 AWG copper wire to be run in conduit, with options for either THHN/THWN(-2) or XHHW-2 cable types. The electrical details show 30 amps rated ampacity, 1.1417 ohms resistance per 1000 feet, 0.05 ohms reactance, 0.9 power factor, and an actual voltage drop of 4.2 volts (3.50%). Six specific part numbers are provided, offering choices between solid and stranded conductors (7-19 strands), with SIMPull or Silicone Free jacket options. All options are available in black and other colors, with single conductor configurations and no ground wire.
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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
File details come from the government source that posted it. Updated .