Thhn cable ampacity software

When sizing conductors, calculations limits wire size to voltage drop and nec ampacity. Southwire is one of the worlds leading manufacturers of wire and cable, tools, components and assembled solutions. Cable ampacity software cable sizing software cable derating. Models duct banks, pipe cables, extruded cables, directly buried cables, casings, or mixtures thereof.

Ampacity level taking into account the installation method of the cable, the software determines the cable size for the installed ampacity. Ampacities of insulated conductors from nec table 31016 not more than three conductors in raceway or cable or earth directly buried based on ambient temperature of 30 c, 86 f. Even though the wires within nmb cable are thhn wire and have insulation rated for 90 degrees c, many versions of the code, including 2011 nec section 33480, limit ampacity of nonmetalic cables such as nmb to no more than that permitted with an insulation rated for 60 degrees c probably due to heat retention by the thick outer pvc jacket. Type thhn thwn2 building wire is intended for general purpose applications as defined by the national electrical code nec. Iec 60502 cable capacity calculations for power cables per iec 60502.

Wire, cables, cords control cable tray cable tray cable vntc products related to 124tcdbxmcr 124 thhnthwn unshielded tray cable for help with 124 thhnthwn unshielded tray cable. Type thhn thwn2 is permitted for new construction or rewiring for 600volt applications. Wire size choose the size awg or kcmil of the wire for which to calculate the maximum allowable ampacity based on the conditions chosen above in the calculator. Equivalent sizes sizes packaging scheme ohm to neutral per 305 m 3 conductors in. Check to make sure that the surface of the counter wheels is not worn smooth and that the wheel turns easily on its shaft. The software examines cable temperature and ampacity in performing analysis of existing systems. The calculation determines the proper cable sizes to carry specified loads in designing new systems and upgrading power cable installations. When the caproblems rrying current exceeds its ampacity, cable damage results, followed by failure that may be difficult to fix. For a 34 id conduit, the max fill area for 2 or more wires or circularequivalent cables is 40% of the available or 0. We provide sustainable solutions that help our customers effectively manage electrical, hydraulic and mechanical power more safely, more efficiently and more reliably. Because outdoors is considered dampwet area, only thhn thwn2 wire should be used at least until the wire enters the attic. You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. Allowable ampacities insulated conductors in a raceway. Usamp prime software models all types of underground power cables pipetype, extruded, and solid paper.

The ampacities in the 600 volt chart on that link are the 90. Cable ampacity software cable sizing software cable. Type awm or mtw conductors are primarily used as appliance or machine tool wiring, as specified by the national electric code. Ampacity of 12 thhn conductor device marked 75c only then you cannot use 60c wire because the device operates at a higher temp than the wire insulation will withstand. Strands 19 insulation thickness mils 50 nylon thickness mils 7 o. Ampacity depends on the strength of the heat source, the material of cables and the surrounding environment, including the ductbank, and soil 5. Get free 2day shipping on qualified thhn, thhn 2, building wires products or buy electrical department products today with buy online pick up in store. Configuration optimization of cables in ductbank based on. Type thhn or thwn2 conductors are primarily used in conduit and cable.

Thhn rated at 30 amperes can be used in a raceway with up to 9. Wire ampacity metric compared with english wire size is usually identified as the area of the conductor in square millimeters. If a cable is loaded continuously above rated ampacity the insulation temperature design limits will be exceeded. Thhn thwn, which means its appropriate for both dry and wet applications. Allowable ampacities of single conductor in free air allowable ampacities for not more than three conductors in raceway, cable or earth. For singlephase circuits, three wires are required.

The number and type of electrical devices connected to a circuit determine the amperage requirement of the circuit. Therefore, a thwn conductor has thermoplastic insulation, is heat resistant to 75 celsius, is rated for wet conditions, and comes with a nylon outer jacketing. National electrical code allowable ampacities of insulated. Allowable ampacities of insulated copper conductors rated up to and including 2000 volts, 600c through 900c 1400f through 1940f, not more than three currentcarrying conductors in raceway, cable, or earth directly buried, based on ambient temperature of 300c 860f temperature rating of copper conductor table formerly table 310. The accuracy of the calculation provides increased confidence in the design, upgrading, and analysis projects. Allowable ampacities for 46 conductors in raceway, cable or earth. Multiconductor cu 600v pvc thhn or tffntfn pvc control. Click add to cart to buy 124tcdbxmcr 124 thhnthwn unshielded tray cable. The ampacity of a conductor is the rated continuous current carrying capacity at a. Lead wire reference chart poster electrical cable supply. This takes into account correction factors for voltage drop, temperature and the number of currentcarrying conductors. Alan wire type thhn or thwn2 conductors are primarily used in conduit as branch circuits in commercial or industrial applications, as specified by the national electric code. Thwn or thhn pvc insulation, nylon jacket, 600 volts application. Astm b3, b8 7,19, 37, 61 strands, b 787 19 wire combination unilay strand.

Computes steadystate and transient ampacities and temperatures for multiple cables with equal or unequal loading. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor. General purpose wiring in accordance with the national electrical code, maximum conductor temperature of 90c in dry locations and 75c in wet locations, 600 volts, for installation in conduit or other recognized raceway. Southwire simpull 4 awg stranded black copper thhn wire bythefoot southwire 500ft 12awg solid black copper thhn wire bytheroll southwire 500ft 12awg stranded green copper thhn wire bytheroll. The load current rating and the overcurrent protection for conductor types shall not exceed 15 amperes for 14 awg, 20 amperes for 12 awg, and 30 amperes for 10 awg aluminum and copperclad aluminum after any correction factors for ambient temperature and number of conductors have been applied. Multiconductor cu 600v pvc thhn or tffntfn pvc control cable. Plot the conductor landmarks for 31c, 500mcm, thwn copper conductors. Silicone free type tcer control cable 600volt copper conductors, polyvinyl chloride pvc with nylon layer insulation thhn or tffntfn polyvinyl chloride pvc jacket, control cable conductor identification method 1 table 2. Thhn building wire is appropriate for use in alternating current ac electrical distribution systems of almost every industrial, residential and commercial building, usually at voltage levels ranging from 110600 volts. If you are interested in thhn thwn wire,please feel free to give your inquiry in the form below or the email above. Copper 600v 90c dry or wet pvc insulated and polyamide nylon jacketed, single core.

Allowable ampacities for 79 conductors in raceway, cable or earth. Applications requiring type thhn or thwn2, the conductor is appropriate for use in wet or dry locations at. Etap electrical engineering software offers a comprehensive set of cable current carrying capacity ampacity and sizing modules based on the following standards and guidelines. Type thhn or thwn2 conductors are primarily used in conduit and cable trays for services, feeders. Southwire type thhn or thwn2 conductors are primarily used in conduit and cable trays for services, feeders, and branch circuits in commercial or industrial applications as specified in the 2008 national electrical code. Usually, a general purpose house circuit is designed for 20 amps. This site offers many simpletouse calculators and wire ampacity charts to aide you in properly sizing wire and conduit in compliance with the nec. Power cable ampacity software eatons mission is to improve the quality of life and the environment through the use of power management technologies and services. As a cable ampacity analysis application, etap engineering software determines the cable current capability based on ieee, iec, icea, nec nfpa, bs, and.