Southwire calculator

Southwire, one of North America’s largest wire and cable producers, now offers satellite-based tracking of its cable products that provides... Read More. ICUEE Conference. October 3-5, 2017. The International Construction and Utility Equipment Exposition (ICUEE), also known as The Demo Expo, is the premier event for utility...

See Southwire's full service offerings catalog. View All Services. Southwire SPEED Services. CableTechSupport Services. Southwire Solutions University. Contractor Solutions Professionals. High Voltage Underground Transmission. Storm Activation Team. Cable Rejuvenation. Digital Grid Resiliency Assessments.Southwire’s voltage drop calculator determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire’s Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.Do you need to calculate the available fault current for your electrical system? Eaton's fault current calculator can help you with easy and accurate point-to-point calculations for three-phase and single-phase circuits. Learn more about this useful tool and download the FC2Mobile app today.‎Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor r…Southwire 50-ft 6-Gauge Stranded Soft Drawn Copper Bare Wire (By-the-Roll) Southwire's bare copper is used for residential electrical systems before entering the home, usually at the meter base. It is also used as a residential grounding wire. Solid and stranded bare copper (classes AA and A) are used for overhead transmission and distribution ...Calculators Instant answers to help better navigate your job site calculations. Calculate Videos See our innovative products in action and learn how they can help make your job easier. View Installation ManualsFill Ratio Calculator. This calculator will allow you to find the fill ratio using one, two, or three cables within the conduit. If you only have one cable for your conduit, please use only the first cable diameter field. Once the fill ratio calculator is computed, the program tells you if it falls within Corning's recommended guidelines.

Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only. Category. Flexible Conduit (4) HVAC (1) Liquidtight Conduit - Metallic (4) Liquidtight Conduit - Non-Metallic (1) Application. Data Centers (4) Certifications. CSA (6)Application. Southwire® Romex® Brand SIMpull® NM-B (nonmetallic-sheathed) cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified in the National Electrical Code. NM-B cable is primarily used in residential wiring as ...Products. Products. Explore our complete product offering. Wire & Cable Tools & Equipment Power Management Lighting Electrical Components SCR ® Technologies New Products. View Our Catalog. 600 Volt Secondary Distribution. Armored Power Cable. Building Wire. Copper Bare & Covered. Explore our complete product offering. Wire & Cable Tools & Equipment Power Management Lighting Electrical Components SCR ® Technologies New ProductsSouthwire Conduit Fill Calculator; Southwire Voltage Drop Calculator; Square Footage Calculator; Get In-Touch With A Crescent Representative Today. Call Us (855) 999-2372. Email Us Request a Quote More Information. question_answer FAQs. Click here for answers to your essential questions. engineering ...

Raceway Fill Calculator. electrician.com Racewayfill Calculator. by electrician.com. This program calculates the number of same size conductors using the .8 roundoff method. In the Auto Mode this program limits the fill to 40 per cent for over 2 conductors, 31 per cent for only two conductors, and 53 percent for one conductor.3.Southwire will cover standard freight charges (Ground Courier Rate) incurred in connection with products that Southwire ultimately determines to be defective. 4. All defective components and defective products that Southwire replaces under these Warranties will become Southwire's property and will be retained by Southwire.Southwire's 5KV cables are suited for use in wet and dry areas, conduits, ducts, troughs, trays, direct burial, and where supe - rior electrical properties are desired. These cables are capable of operating continuously at the conductor temperature not inSee Southwire's full service offerings catalog. View All Services. Southwire SPEED Services. CableTechSupport Services. Southwire Solutions University. Contractor Solutions Professionals. High Voltage Underground Transmission. Storm Activation Team. Cable Rejuvenation. Digital Grid Resiliency Assessments.Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.Dead Wraps: The first few wraps of the wire rope around the drum (commonly known as the "dead wraps") provide a simple and secure method of anchoring the wire rope to the drum. This (anchoring) is accomplished by the friction (of the dead wraps) tightening against the drum barrel, as a load is applied. As the load on the wire rope increases so ...

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For non-Southwire conductors, please contact the conductor manufacturer for design information. The data contained in Southwire WIR files is confidential and proprietary to Southwire Company, LLC and is for use in association with Southwire products only. You may not disclose, distribute, or copy these files without the express written consent ...Southwire Voltage Drop Calculator Hd free download - Voltage Drop Calculator, Voltage Drop, Complex Voltage Drop Calculator, and many more programsCalculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.Read reviews, compare customer ratings, see screenshots and learn more about Southwire® Voltage Drop Calc. Download Southwire® Voltage Drop Calc and enjoy it on your iPhone, iPad and iPod touch. ‎Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current ...Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations ...Application. Predominantly used for underground transmission in conduit systems, suitable for use in wet or dry locations, direct burial, underground duct, and where exposed to sunlight. To be used at 138,000 volts or less and at conductor temperatures not to exceed 90°C for normal operation. Conductor.

AWG 1. The inverter is the most finicky and dangerous part of an electrical system. While you can use this calculator for sizing the wires, we highly recommend to follow the manufacturer recommendations from the owner's manual (fuse size, wire gauge, and wire length). That'll ensure the inverter installation is safe and performs as it should.tjb · #5 · Oct 19, 2018. I hope you’ve already adjusted the ampacity for your conductors based on table 310.15 (B) (3) (a), as well as conform to chapter 9’s tables 1 and 4. You said you’re at 75% fill, so I assume you’ve already derated and upsized your conductors appropriately. XHHW is annoying to pull through plastic.To calculate the load requirement for a circuit, first add up the wattage of all the electrical devices that will be on the circuit. Then, divide the total wattage by the voltage of the system, typically 120 or 240, and that will give you the required current or amps. Copper. Aluminum. Wire Gauge Size. 60°C (140°F)Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific …Read reviews, compare customer ratings, see screenshots and learn more about Southwire® Conduit Fill Calc. Download Southwire® Conduit Fill Calc and enjoy it on your iPhone, iPad and iPod touch. ‎Southwire has created this great tool to help electricians, engineers and contractors answer the question, "What size conduit do I use" per ...Application. Southwire® Romex® Brand SIMpull® NM-B (nonmetallic-sheathed) cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified in the National Electrical Code. NM-B cable is primarily used in residential wiring as ...See Southwire's full service offerings catalog. View All Services. Southwire SPEED Services. CableTechSupport Services. Southwire Solutions University. Contractor Solutions Professionals. High Voltage Underground Transmission. Storm Activation Team. Cable Rejuvenation. Digital Grid Resiliency Assessments.72 72. 1986 50.44. 3014 4485. Used as bare overhead transmission conductor and as primary and secondary distribution conductor and messenger support. ACSR offers optimal strength for line design. Variable steel core stranding enables desired strength to be achieved without sacrificing ampacity.The conduit sizing calculator is a helpful tool for engineers to answer questions regarding the size conduit to use per NEC® guidelines. Enter your information in the fields below and click "Calculate" at the bottom of the page. If you want to reset the numbers, click the "Reset" button. Conduit Type. Cable Size.

Southwire + The Mom Project are proud to partner together to bring, and keep, the strength of moms in the workplace. The People Behind the Power™ are what make Southwire one of the world's leading developers, manufacturers and suppliers of building wire and cable. Vimeo is a video hosting, sharing, and services platform focused on the ...

DC / single phase calculation. The voltage drop V in volts (V) is equal to the wire current I in amps (A) times 2 times one way wire length L in feet (ft) times the wire resistance per 1000 feet R in ohms (Ω/kft) divided by 1000: Vdrop (V) = Iwire (A) × Rwire(Ω) = Iwire (A) × (2 × L(ft) × Rwire(Ω/kft) / 1000 (ft/kft)) The voltage drop V ...Choose a Product Category. Wire & Cable Tools & Equipment Power Management Lighting Electrical Components.Chukar. Spec Sheet. Aluminum Conductor Steel Reinforced Bare Applications Used as bare overhead transmission conductor and as primary and secondary distribution conductor and messenger support. ACSR offers optimal strength for line design. Variable steel core stranding enables desired strength to be achieved without sacrificing ampacity.where: V total V_\text{total} V total is the total box fill;; A total A_\text{total} A total is the total volume allowance; and; V largest conductor V_\text{largest conductor} V largest conductor is the free space we provide for the largest conducting wire entering the box, as specified in Table 314.16(B).; In those cases where the largest conductor and the …Select the material either copper or aluminum, the size of the conductor, the voltage and phase from a list of common voltages, then enter the one way circuit length in feet, and load in amperes. This program finds voltage drop, percent voltage drop, and volts at end of circuit. Use Voltage Drop Calculator.Read reviews, compare customer ratings, see screenshots and learn more about Southwire® Conduit Fill Calc. Download Southwire® Conduit Fill Calc and enjoy it on your iPhone, iPad and iPod touch. ‎Southwire has created this great tool to help electricians, engineers and contractors answer the question, "What size conduit do I use" per ...Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.A great tool to help electricians, engineers and contractors answer the question, "What size conduit do I use per the NEC®?" The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors. Download apps by Southwire Company, including Surge Guard, Southwire Circuit, Southwire Lighting Controls, and many more. ... SIMpull 600V Calculator. Reference Southwire® Conduit Fill Calc. Utilities Southwire® MCAP® Savings Calc. Utilities Partial Reel Calculator. Utilities Southwire® Voltage Drop Calc.

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Read reviews, compare customer ratings, see screenshots, and learn more about Southwire® Conversion Calc. Download Southwire® Conversion Calc and enjoy it on your iPhone, iPad, and iPod touch. ‎Southwire's Conversion Calculator helps to convert copper to aluminum or aluminum to copper, pricing unit of measure, conversion factor and weight ...http://www.southwiretools.com/tools/categories/cablepullingSouthwire's SIMpull Cable-in-Conduit can help you save time and money on your underground wire ins...this is what the southwire calculator states, although this is probably based on NEC ampacities. now, if you go into the cec, and check out appendix D, table d10b, detail 1 for single phase direct buried cable, 3/0 aluminum is good for 231a (the 90degree rating from table d10b, multiplied by the .886 75 degree correction factor) ...This calculator will help determine the required cable size and approximate values for the voltage drop, percentage drop, current load and max cable load of the specified electrical circuit. The calculations are based on information provided in IET Wiring Regulations 18th Edition. Application. Circuit Type. Ambient Temperature. Number of Circuits.eg 00.249.001 nergUSlscnsus lscnsus Page 1 of 6 TECHNICAL UIDELINE February, 2018 T84 Rev.4 Medium Voltage Conductor Ampacities COPPER Conductor Size AWG/kcmil 2001 - 5000 V 5001 - 35000 VA great tool to help electricians, engineers and contractors answer the question, "What size conduit do I use per the NEC®?" The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors.The figure we would plug into the calculator would be: (40 x 1.25) + 14 + 3 = 50 + 14+ 3 = 67 amps. Allowable Voltage Drop – The calculator allows entry of a voltage drop, but caution should be used when doing so to make sure you are calculating the wire sizes in accordance with NEC article 210-19 (FPN No. 4.)A voltage drop calculator (VDC) is crucial for any electrical engineer or designer. It enables them to calculate VD accurately, which is essential for maintaining an efficient and safe electrical system. Voltage drop calculators are used in various applications, including residential, commercial, and industrial settings, and offer several ... Conduit Fill Calculator. $2.99. Based on NEC Code Book 2008, to calculate the proper conduit size required by code. With 50 types of conductors and 12 types of conduits.This calculator will help determine the required cable size and approximate values for the voltage drop, percentage drop, current load and max cable load of the specified electrical circuit. The calculations are based on information provided in IET Wiring Regulations 18th Edition. Application. Circuit Type. Ambient Temperature. Number of Circuits. ….

Southwire Company, LLC | One Southwire Drive, Carrollton, GA 30119 | www.southwire.com Insulation Resistance Testing • On the end not being connected to the test equipment, make sure sufficient clearance (six inches or more) is maintained between cable ends and the ground plane. For 600-5,000 Volt Non-Shielded CableSouthwire ® Conversion Calculator Converts copper to aluminum or aluminum to copper, pricing unit of measure, conversion factor, and weight per product length. MApp™ App Works with Southwire Bluetooth® enabled multimeters to record and graph measured values, set high or low alarms, attach notes, pictures, and GPS locations.Conduit Size Selector. The Construction Monkey Conduit Selector will provide you with the appropriate conduit size based on the number of conductors that you have to install. Make your selections below and the form will automatically update the values.where: V total V_\text{total} V total is the total box fill;; A total A_\text{total} A total is the total volume allowance; and; V largest conductor V_\text{largest conductor} V largest conductor is the free space we provide for the largest conducting wire entering the box, as specified in Table 314.16(B).; In those cases where the largest conductor and the …Execution management and process mining from Celonis. We reveal and realize the value opportunities hiding in your processes - fast.Latest News: More from App Sliced: Filmic Firstlight - Photo App For iPhone/Watch Drops To Free For First Time In Three Years February 1st, 2023, 9:20AM EST; Boris and the Dark Survival For iOS Ties Lowest Price In Two Years February 1st, 2023, 9:00AM EST; Wednesday's Sales: Boris And The Dark Survival, FAR, The Innsmouth Case, Filmic Firstlight, Next Time I'm Up Reminder, And More February ...tjb · #5 · Oct 19, 2018. I hope you’ve already adjusted the ampacity for your conductors based on table 310.15 (B) (3) (a), as well as conform to chapter 9’s tables 1 and 4. You said you’re at 75% fill, so I assume you’ve already derated and upsized your conductors appropriately. XHHW is annoying to pull through plastic.Cable sizing calculator AS/NZS3008; Maximum demand calculator AS/NZS3000; Parameters for the IEEE 1584 2018 Arc Flash Calculator. Standard: Select IEEE 1584-2018 or IEEE 1584-2002. Unit of measure: Imperial (in) or Metric (mm). Note that Conductor Gap is always in metric.Select the material either copper or aluminum, the size of the conductor, the voltage and phase from a list of common voltages, then enter the one way circuit length in feet, and load in amperes. This program finds voltage drop, percent voltage drop, and volts at end of circuit. Use Voltage Drop Calculator. Southwire calculator, Tax calculators are useful for those who would like to know information about their take-home pay after deductions occur. Here are some tips you should follow to learn how to use a free tax calculator IRS so you can determine more informati..., DC / single phase calculation. The voltage drop V in volts (V) is equal to the wire current I in amps (A) times 2 times one way wire length L in feet (ft) times the wire resistance per 1000 feet R in ohms (Ω/kft) divided by 1000: Vdrop (V) = Iwire (A) × Rwire(Ω) = Iwire (A) × (2 × L(ft) × Rwire(Ω/kft) / 1000 (ft/kft)) The voltage drop V ..., 72 72. 1986 50.44. 3014 4485. Used as bare overhead transmission conductor and as primary and secondary distribution conductor and messenger support. ACSR offers optimal strength for line design. Variable steel core stranding enables desired strength to be achieved without sacrificing ampacity., Note: These values are based on allowable ampacities of insulated conductors rated up to and including 2000 volts, not more than three current-carrying conductors in a raceway, cable, or Earth, single-insulated conductor in free air, and an ambient air temperature of 30°C (86°F).. Source: NFPA 70, National Electrical Code Table 310.15(B)(16-17), The calculator will determine the conduit fill percentages and jam probability for multiple conductors per NEC® guidelines. Simply enter the conduit type and size, then specify your conductors. ABOUT CUSTOMER SOUTHWIRE'S CONDUIT FILL CALCULATOR 6-6-6-8 STR CU USE to be installed into 1" Schedule 40 HDPE duct PRODUCT, The Neher-McGrath Calculations is a method for calculating underground cable temperatures and cable ampacity ratings. The Calculations method derived from: J. H. Neher and M. H. McGrath,"The Calculation of the …, I found some Southwire conduit in our wall that I'd like to use for a 60A subpanel, but I'm not sure everything will fit. I found a Subpanels article on Fine Homebuilding that recommended 3 x 6 AWG (hots and neutral) and 1 x 10 AWG (ground) in 3/4" conduit. I plugged all this into the fill calculator on Southwire's site, which says the conduit won't jam, supporting the article's conduit size ..., 1 Power Factor is assumed to be 0.90. 2 Temperature Rating assumed to be 75°C. 3 Weights are approximate and do not include insulation weights. 4 Values Per 1000 feet. 5 Maximum length is based on a load that is 80% of the fuse size., Power Conversion Calculator. For AC & DC Electrical Systems in Transportation (EV, Rail, Airports), Renewable Power (Solar, Wind, BESS), Utility and Commercial Buildings., Southwire Voltage Drop Calculator Disclaimer: Gordon Electric Supply takes no responsibility for any information contained in the above resources. The use of the information and/or calculators is the sole responsibility of the user., See Southwire's full service offerings catalog. View All Services. Southwire SPEED Services. CableTechSupport Services. Southwire Solutions University., eg 00.249.001 nergUSlscnsus lscnsus Page 1 of 6 TECHNICAL UIDELINE February, 2018 T84 Rev.4 Medium Voltage Conductor Ampacities COPPER Conductor Size AWG/kcmil 2001 - 5000 V 5001 - 35000 V, Using the Southwire voltage drop calculator, with a distance of 280 feet, 480V three phase, 2x 4/0 Cu conductors, 460A, I get a voltage drop which is 1.4%, generally acceptable. What OCPD are you using? #1 Cu EGC is usable for a 600A breaker.-Jon, Do you need to calculate the available fault current for your electrical system? Eaton's fault current calculator can help you with easy and accurate point-to-point calculations for three-phase and single-phase circuits. Learn more about this useful tool and download the FC2Mobile app today., The Wire Size Calculator below will calculate the proper wire size for a circuit based on circuit amps, preferred (or available) wire insulation, conductor type and installation specifications. For more advanced considerations, use the Wire Size Calculator or the Advanced Wire Size Calculator., Southwire's voltage drop calculator will help you determine the proper wire size for an electrical circuit based on the voltage drop and current carrying capacity of an electrical circuit. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations ..., Southwire SPEED™ Services offers a variety of solutions based on your urgent needs.Whether it is a made-to-order product that requires customization, a reduced lead time or minimum order quantity, or a made-to-stock product that requires shipment today or specific delivery expectations, our concierge customer specialists will provide options to meet your needs all from one U.S. manufacturing ..., southwire 55039603 12 3/c cu black sjeoow/sjtoow(tpe)105*c poly southwire 55039603 12 3/c cu black sjeoow/sjtoow(tpe)105*c... Call for price Available: Available, Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only. , DC / single phase calculation. The voltage drop V in volts (V) is equal to the wire current I in amps (A) times 2 times one way wire length L in feet (ft) times the wire resistance per 1000 feet R in ohms (Ω/kft) divided by 1000: Vdrop (V) = Iwire (A) × Rwire(Ω) = Iwire (A) × (2 × L(ft) × Rwire(Ω/kft) / 1000 (ft/kft)) The voltage drop V ..., A great tool to help electricians, engineers and contractors answer the question, "What size conduit do I use per the NEC®?" The app will calculate the conduit fill percentages and jam probability for multiple conductors per NEC® Guidelines. Simply enter the conduit type and size, then specify your conductors. , PDHonline Course E276 (2 PDH) Conduit Fill Calculations 2020 Instructor: David A. Snyder, PE PDH Online | PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658, Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only., The Value of Labor Cost Savings. Quickly and easily illustrate the value of labor cost savings when using MCAP ® cable in place of traditional MC cable products. Based on the total number of outlets, boxes and light fixtures, the calculator will provide an estimated time and cost savings., Reel Capacity Calculator. This computes reel capacity in feet from your dimensions in inches.*. (Javascript needs to be enabled on your browser for this estimator to work.) * Please verify this guide with actual put ups as variables of tension, lay, material type, etc. will affect capacity. ** Fill diameter is the Flange diameter less 2 ..., Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only. , The Siemens Conduit Fill Calculator is based on NEC® 2005 Chapter 9, Table 1, and Article 310 Table 310.15(B)(2)(a) for conduit size and on Chapter 9 Table 2 for bending radii - refer to the NEC® for more information. This tool is used to calculate the minimum code required size of conduit for a given fill of single insulated conductors., 556.5-20/7 TYPE 16 DOVE/TW ACSR/TW 10000 FT. Southwire #: 36577501. Used for bare overhead transmission, primary and secondary distribution. Two design offerings: Equal Area or Equal Diameter when compared to standard round ACSR. Equal area designs allow comparable ampacity in a smaller diameter when compared to a standard round ACSR., Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only. , Explore our complete product offering. Wiring & Cable Tools & Features Power Management Lighting Electrical Components SCR ® Technologies New Products, The app provides quick and easy navigation. Enter the Conduit Type and Size and specify your conductors. The App will calculate the Conduit Fill % as per NEC Guidelines. Southwire Company is North America’s leading manufacturer of wire and cable used in the distribution transmission of electricity. Throughout its history, our company has ... , Application. Southwire® Romex® Brand SIMpull® NM-B (nonmetallic-sheathed) cable may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified in the National Electrical Code. NM-B cable is primarily used in residential wiring as ..., Calculate Your Voltage Drop. Determines wire size to meet specific voltage drop limits or calculates voltage drop for a specific conductor run. When sizing conductors, calculations limits wire size to voltage drop and NEC ampacity. Southwire's Voltage Drop Calculator is designed for applications using AWG and KCMIL sizes only.