Ampacity copper and aluminum type mv90 and mv105 cables. These limits should not be used for cables subjected to pulling tensions during installation. Sizes 250 through 500 kcmil available with thin wall 0. The need for ampacity calculation, when do we need ampacity calculation. Cable ampacity is limited by the peak temperature to which the insulation is. A great tool to help electricians, engineers and contractors answer the question, what. As a cable ampacity analysis application, etap engineering software determines the cable current capability based on ieee, iec, icea, nec nfpa, bs, and nfc standards. Southwire is one of the worlds leading manufacturers of wire and cable, tools, components and assembled solutions. For singlephase circuits, three wires are required. Cable sizing software computes the size of the cable by also considering overload protection.
Conductor ampacity calculation part five electrical knowhow. To calculate the load requirement for a circuit, first add up the wattage of all the electrical devices that will be on the circuit. Determine the allowable ampacities of insulated copper conductors, single insulated copper conductors, and more from the. In this section, shield cables with parameters of 37 strands, 750 kcmil were. The cymcap software is dedicated to the calculation of ampacity and temperature rise calculations for power cable installations. Cable sizing and its effect on thermal and ampacity values in. You must use the correct size wire for the current load requirement of the circuit to prevent the wire from overheating. Engineering data for copper and aluminum conductor electrical cables. National electrical code allowable copper conductor ampacities. Okonite 1 printed on post consumer paper 12017 okonite cables.
Allowable ampacities insulated conductors in a raceway. Our products lie in the walls of your home, in the transmission lines that power our neighborhoods, in the places we work, schools where we learn and the hospitals that keep us well. Cable construction single insulated conductor conductor size awgkcmil ampacity 75 c 167 f 90 c 194 f 14 30 35 12 35 40 10 50 55 8 70 80 6 95 105 4 125 140 3 145 165 2 170 190 1 195 220 10 230 260 20 265 300 30 310 350 40 360 405 250 405 455 300 445 500 350 505 570 400 545 615 500 620 700 600 690 780 700 755 850 750 785 885 800. Its important to note that youre able to get your 1250 mcm price, 1250 kcmil pricing to purchase your copper wire and aluminum conductor cable today. Ihi connectors aka international hydraulics inc 7700 st. As an option, this cable can provided prepulled into. 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. Nec 600 volt ampacity tables for electrical cables.
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. For arc welding cable applications length in feet for total circuit for secondary voltage only do not use this table for 600 volt applications. Cable ampacity software cable sizing software cable derating. The accuracy of the software provides increased confidence when upgrading power cable installations and designing new ones. Ampacity chart table b3101 ampacities of two or three insulated conductors. Use of computer programs for calculation of underground cable ampacity software programs usually use neher mcgrath method for the calculation of the cable ampacity. What is the amperage rating for 750 mcm aluminum wire. What is the ampacity of a 75 degree c rated 750 kcmil copper. Engineering data for copper and aluminum conductor.
Free air rating allows greater ampacity with less copper. Rated 0 through 2000 volts, with an overall covering multiconductor, on raceway in free air based on ambient air temperature of 30c 86f. In article conductor ampacity calculation part four, i explained the rule that controlling and refining the conductor ampacity selection from nec tables. The primary purpose of the ampacity calculations was to detennine a minimum conductor size and cable system configuration based on the design requirements provided by xcel energy. An electrical distributor supplying everything from light bulbs and dimmers to plcs and industrial automation equipment. A circular mil is the area of a wire one mil in diameter. Premier manufacturers of high quality insulated electrical wire and cable since 1878. What is the ampacity of a 75 degree c rated 750 kcmil. Type p marine and offshore cable is primarily designed for power, control, signal, and instrumentation applications for offshore and land drilling rigs, marine vessels, and offshore production facilities. They consider only temperature limited, current carrying capacity of cables. In project 77, dstar began a fullscale field testing program to confirm the analytical predictions of cable temperature rise due to heat sources, such as other cables, crossing or in parallel to a cable for a short distance. Medi ltage single conductor 5 35 mv cable copper mv cable aluminum nec table 310. Cable sizing and its effect on thermal and ampacity values.
One million circular mils is the area of a rod with mil 1 inch diameter. Enter the information below to calculate the maximum allowable ampacity for currentcarrying conductors. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor. As a cable ampacity analysis application, etap engineering software determines the cable current capability based on ieee, iec, icea, nec nfpa, bs, and. This material standard applies to the following seattle city light stock number. Teck cable, 1kv, 3 conductor, 750 mcm, stranded bare copper, xlpe, pvc, aia, csa, ft4. A 750 mcm copper conductor with an insulation factor of 75 and 90 degree c is rated at 475 and 500 amps respectively. Home resources calculators conduit fill calculator. Usually, a general purpose house circuit is designed for 20. Practical power cable ampacity analysis ced engineering. National electrical code allowable ampacities of insulated. Hundreds of electrical products and tools to select from. This dissertation addresses underground electric power cable ampacity and provides. Aluminum 600v urd cable is designed for use in secondary distribution circuits, where installed in duct or direct burial applications.
Teck cable, 1kv, 4 conductor, 750 mcm, stranded bare copper, xlpe, pvc, aia, csa, ft4. What is the ampacity of a 75 degree c rated 750 kcmil copper cable wire. Ampacity tables have been prepared for singlecore, 1500 and 2000 kcmil cables, and triplexed 750 kcmil cables installed in concreteencased duct banks. Cable ampacity tables for direct current traction power. Mp husky utilizes an inductive reactance program to achieve the proper. The wire ampacity calculator will quickly calculate the maximum allowable current through a conductor based on wire size awg or kcmil, wire insulation, conductor type and installation method. Allowable ampacities of single conductor in free air allowable ampacities for not more than three conductors in raceway, cable or earth. Software programs are commercially available that can perform sophisticated modeling of. The calculation determines the proper cable sizes to carry specified loads in designing new systems and upgrading power cable installations. Engineering data for copper and aluminum conductor electrical. Vital components of an overall cable system, these accessories are designed, manufactured and precisioncontrolled to ensure bestinclass performance and longterm service reliability.
One to 3 conductors in raceway, cable or direct burial. Southwire simpull ct1et type mv105 cable is for use in aerial, direct burial, cable trays, conduit, and underground duct installations as permitted by the national electrical code. Unit mounted breakers only, does not fit on iline construction. Suited for use in a broad range of commercial, industrial and utility applications, where reliability is the major concern, space is limited and ease of installation is critical. Cable network usually forms a backbone of the power system. Diameter nec copper wire ampacity okonite ampacity tables. Allowable ampacities for 46 conductors in raceway, cable or earth. What is the amperage rating for 750 mcm copper wire. This material standard covers the detailed requirements for 115 kv, 2500 kcmil, crosslinked polyethylene xlpe, single conductor cable used for the transmission of electric energy. Allowable ampacities of singleinsulated conductors rated up to and including 2000.
Helps determine the proper wire size for an electrical circuit based on the voltage. Engineering data for copper and aluminum conductor electrical cables 102 hilltop road, ramsey, nj 07446 201. This calculator also provides wire size correction factors for temperature, number of conductors in a raceway, and voltage drop for long wire runs. Welding cable ampacities the total circuit length includes both welding and ground leads based on 4volt drop 60% duty cycle required cable sizes. These cables are capable of operating continuously at a conductor temperature not in excess of 105c for normal operation, 140c for emergency overload conditions. Practical power cable ampacity analysis cedengineering. Cable sizing software cable sizing calculation etap. Usamp prime insulated cable ampacity software models all types of underground power cables pipetype, extruded, and solid paper. Calculation of the cable ampacity considers only power cables since control cables. F not more than three currentcarrying conductors in raceway, cable, or earth directly buried, based on ambient temperature of 30. Allowable ampacities for 79 conductors in raceway, cable or earth. A guide to allowable ampacities insulated conductors. Feeder mc cable is suitable for use in branch, feeder and distribution circuits in commercial, industrial, institutional and multiresidential applications. Southwires voltage drop calculator is designed for applications using awg and kcmil sizes only.
Home download center electrical software cable ampacity calculator description this is digital version of the most frequently used ampacity tables that you would find in electrical codes canadas cec and u. Does not fit on powerpact m frame circuit breakers. Awg wire chart, aught, mcm kcmil, us inch, and metric wire. Cable sizing and its effect on thermal and ampacity values in underground power distribution over the past decade, underground power distribution has become increasingly popular due to its reliability, safety, aesthetic characteristics, as well as the ever increasing focus on the environmental impacts of the various stages of. Conduit fill is the percent of area inside the conduit taken up by the cable s. The advanced wire ampacity calculator will calculate the maximum ampacity for a wire based on wire gauge, preferred or available wire insulation, conductor type and installation specifications. What is the amperage rating for 750 mcm copper wire answers. As excerpted from the 2002 national electrical code. Ampacity based on earth thermal resistivity of 90ccmwatt, 90c conductor temp. Also, in article conductor ampacity calculation part three, i explained the following points. For more information on mechanical lug kits see instruction bulletin 48049503 in technical library. Nec code installations ampacity at 75c conductor temperature 30c ambient.
Its important to note that youre able to get your 5000 mcm price, 5000 kcmil pricing to buy your copper and aluminum cable today. Sewanee 750 mcm single aluminum conductor 600v urd. This manual provides installation information for power and control cables for industrial. Cable offers a wide range of silec hvehv cable accessories. The results show the nehermcgrath calculations and cymcap software outputs. Conductor ampacity calculation part five electrical. Ampacities of not more than three currentcarrying conductors in raceway, cable or earth.
Table 6 5 single conductor cable underground ducts one circuit, three cables in separate ducts 22 table 6 6 single conductor cable underground ducts two circuits, six cables. Cable ampacity calculator electrical engineering portal. The accuracy of the calculation provides increased confidence in the design, upgrading, and analysis projects. Cable ampacity software cable sizing software cable. The use of this table for establishing ampacity ratings is an inexact procedure. What is the catalog number for 750 kcmil lugs for the.
Power cable installation guide figure f5 multiple sheaves figure f6 sheave arrangements for feeding into cable tray training radius the training radius is the final positioning of cable ends after the cable has been placed in the raceway. The software examines cable temperature and ampacity in performing analysis of existing systems. Home download center electrical software cable ampacity calculator. It is recommended that design engineers desiring accurate ampacity data study the national electrical code handbook article 31031084. Specializing in power, control, instrumentation, transmission, distribution, signal. We ship our orders same day and cut to length with no extra charges. Etap cable sizing program calculates the minimum size required by meeting the overload protection conditions between derated ampacity, operating current and nominal current. Applications type xhhw2 is intended for use as general purpose wiring in air conduit or other recognized raceways for services, feeder and branch circuit wiring as specified in the national electric code at a maximum conductor temperature of 90c in wet or dry locations. This table should only be used as a starting point when establihsing ratings for any given situations. Provides quick and easy results for the conduit fill percent, per nec guidelines. Copper conductors primarily used when more ampacity is needed andor there are limitations to the.