Aluminum wires are rated differently than copper wires. Each one of the live and neutral wires has a cross sectional area of 1.5mm or 2.5mm. Both these devices are designed to sense current overloads and to trip or "blow" before the wires can overheat to the danger point. In installations using metal conduit, the solid wire doesn't always pull as easily if the conduit has a large number of bends. Figure 5 is an example of a chart for selecting the proper welding cable size. Examples of Non Critical circuit are general lighting, Other factors must be considered grouping ,fixing,pass through insulation? (Note that … There are currently no related questions for this topic. The following wire size chart is intended to be a general guide for wire size and amp ratings. VAT Cable Size & Current Rating Chart. Divide this by 120 to get 7 amps. If you snip one of the wires and look at one of the wires face down you will see it’s cross section. It is important to choose the correct size cable when connecting to the mains. Distance Between Two Earth Electrode. WIRE CHART 12 Volt acceptable cable size (mm†) Cable Length (metres) ... AC electricity behaves quite differently. You must use the correct size wire for the amperage requirement of the circuit to prevent the wire from over heating. In doubt? Using their smart phone, an electrician can input relevant data into the website and it will instantly create a simple cable selection and sizing report based … used when figuring electrical material needs and is already calculated in the chart. The following wire size chart is intended to be a general guide for wire size and amp ratings. The number and type of electrical devices connected to a circuit determine the ampacity requirement of the conductor. American wire gauge size calculator and chart. You’ll also learn how to choose between electrical cables and wires for … Overview. The Gauge Guide bullets will help you determine the overall size (including insulation) of an unmarked cable. Up to 3600 Watts. Voltage (Drop) = Wire Resistance Times Amps of current (E=IR) Calculating the voltage loss for a pair of wires gets a little complicated, so we have constructed a quick look up table for what size wire you will need for your … I use compact fluorescent bulbs, so I have five 27 watt bulbs. Current. Cable Selection, Copper Only, up to 25mm², above this Cable Reactance must be considered. 1.5mm cable means a cross sectional area of 1.5mm of the live or neutral wire. While circuit breakers or fuses offers good protection against overloading wires and overheating them, they are not absolute protection. There is the potential for danger anytime a device or appliance tries to draw more power on a circuit than the wire gauge is rated for. The resistances and skin depth noted are for copper conductors. One more thing to keep in mind is to select the style of wire that best fits your needs. For example, plugging a heater rated for 20 amps into a 15-amp circuit wired with 14-gauge wire poses a distinct danger. Some wire is stranded, while other wire consists of a solid copper conductor. The reset button is used to clear the values in the field. Actual diameters may vary depending on the age, make and insulation thickness of your cable. This Cable size calculator helps you find the exact size of your cable/Wire needed along with voltage drop and much more. If you've shopped for electrical wire, you have likely noticed that there are many types and sizes of wire to choose from. Call a qualified electrician. Earthing Material Weight Per m & Specifications. As an example, let’s assume you have a 400 amp power source at 60% duty cycle and need a total combined length of electrode plus work cables of 100 feet. Voltage Drop. Using wire size 3/0 copper or 250MCM Aluminum. Back then, these heavy duty 1kV and 2KV Diesel Locomotive cables … For standard non-metallic (NM) cable, these amperage capacities are: These ratings are for standard copper NM sheathed cable, but there are instances where these amperage ratings vary. Tables 4 to 21 are based on an ambient temperature of 40°C and a ground temperature of 25°C. By using The Spruce, you accept our, Choosing the Correct Extension Cord Sizes, Learn What Happens When an Electrical Circuit Overloads, Determine Proper Electrical Wire Gauge, Ampacity, and Wattage Load, The Basics of 240/250-Volt Air Conditioner Circuits, What You Need to Know About Kitchen Electrical Code, Safety Rules for Using a Portable Generator, How to Replace a Standard 120-Volt Outlet Receptacle, All About Electrical Wiring Types, Sizes, and Installation, How to Avoid Overloaded Circuits With Christmas Lights, Calculating Electrical Load Capacity for a Home, How to Wire a 120/240-Volt Outlet for an Electric Range, Understanding Electrical Grounding in Household Wiring. The size stated for cables is given in mm 2 … Each wire size, or wire gauge (AWG), has a maximum current limit that a wire can handle before damage occurs. The wire has to be the correct size so that it can cope with the power demands of the device. Wire gauge calculations Wire diameter calculations. In addition to wire size, the table provides values load (current) carrying capacity, resistance and skin effects. DC Amps Locate the current flow in amps of your circuit along the top of the chart below. Electricity is dangerous and can be hazardous. DLO Cable was originally developed for wiring diesel-electric locomotive trains dating back before the 1920’s, over 100 years ago. This results in the wire overheating and causing a serious safety risk. About + Certifications. This 3 phase motor cable size calculator is […] Enter your proposed cable size,type of insulation,Voltage,ambient temp (30 is norm) your cable length and circuit load in Amps. A No. This wire size calculator will calculate the appropriate wire gauge for a circuit based on amps, voltage, distance, and load. Please consult your cable suppliers specifications for true values. Power KiloWatts. The larger that area the higher the current it can carry. These markings provide important information about the wiring and insulation, including the wire size and material, the type of insulation, the number of wires contained (inside a cable), … The voltage drop is the same regardless of voltage, assuming that amps… Up to 3120 Watts. 23 www.gvk.com.au ph: (03) 9312 6633 metric cable imperial cable nom. 92 ((36-AWG)/39) inch. Cable (or conductor) estimating is the way toward choosing suitable sizes for electrical power cable conductors. For application of this section, the main Values are for not more than three conductors in raceway or cable (reference: National Electrical Code, ANSI/NFPA 70-1999).. AWG to MM2 PDF. Motor Feeder Cable … • To calculate the amperage for a circuit, first add up the wattage of all the electrical devices that will be on the circuit. Up to 2400 Watts. mm² metric strand nom. 25 amps. Electrical current is measured in amps. For example, there is aluminum wiring in some homes, and aluminum wires have their own ampacity-carrying capacity. For the 00, 000, 0000 etc. ... Run is 300 ft. 120/240 volt system 170 amps 3% V.D. I add these all up to get 850 watts. Table 1: American Wire Gauge (AWG) Cable … Amps. Kiesling Machine. 6 copper TW conductor. One needs to consider the voltage drop, … Electricity is dangerous and can be hazardous. As an example, let’s assume you have a 400 amp power source at 60% duty cycle and need a total combined length of electrode plus work cables of 100 feet. The n gauge wire diameter d n in inches (in) is equal to 0.005in times 92 raised to the power of 36 minus gauge number n, divided by 39:. Actual diameters may vary depending on the age, make and insulation thickness of your cable. For a 40 amp you need a 8-gauge wire size and for a 20 amp, you will need a twelve-gauge wire size. If a cable is used which is too small for the amount of current passing through, it becomes dangerous. Usually, a general purpose house circuit is designed for 20 amps. Throughout this time we have continued to develop in to an internationally recognised brand throughout the cable … This website provides a wire size calculator, voltage drop calculator, wire ampacity charts and more. 20 amps. Once the proper amperage is determined, though, it is critical, that the wire gauge used in the circuit is appropriate for the amperage of the circuit breaker. NEC requires a minimum of 100-amp 3-wire service for a single-family dwelling unit. You should follow the Handbook of Electronic Tables and Formulas for American Wire Gauge to refer to electronic wire sizing chart. Table of underground electrical service cable sizes & amps - How to detemine the electrical service size or ampacity entering a building, step by step, illustrated instructions, how to use a DMM,digital multimeter, or analog voltage meters to determine or estimate service voltage, and electric service and electric panel … Then our cable size calculator will give you the suitable internal control cable size, internal power cable size, panel to motor outgoing cable size etc. Home; Formulas; Best Cable Size; Use; FAQ; Cable Size Calculator. DLO Cable stands for “Diesel locomotive cables”or DLO Wire. Find local trades and suppliers at DIYnot Local. Call a qualified electrician. The … Up to 4800 Watts. You must use the correct size wire for the current (load) requirement of the circuit to prevent the wire from overheating. ... Wire Size: 60°C (140°F) 75°C (167°F) AWG (mm²) Copper: Aluminum: Copper: Aluminum: The tables below are intended to be a general guide for wire size and amp ratings. Wire Gauge Amp Ratings Chart. FAQ. Table of Common Electrical Wire Sizes and Amps or Fuse Ratings - Residential SEC Cable & Other Wire Ampacities for 1-3 Current-Carrying Conductors in Cable, Earth, or Raceway For 120/240-volt systems sized between 100 and 400 amperes: Electrical Conductor Wire Size or Gauge - AWG or kcmil: AMPACITY Rating COPPER Wire Conductors It replaces many pages of older sizing charts. The cable sizing calculator supports the following conductor: Solid or stranded copper. home / about / resources / wire size. The number and type of electrical devices connected to a circuit determine the amperage requirement of the circuit. The website, www.as3008.com, has been created to assist electrical engineers, technicians and electricians to quickly select and size cables and ensure AS3008 compliance. Click here to post your question/comment. • The number and type of electrical devices connected to a circuit determine the amperage requirement of the circuit. Step 2. Do you have a question or comment about this topic? Electric cable size wise how much load can be take. 7.Lt Cable Sizing Calculation . The table below gives typical values of cable size available plus corresponding current rating and maximum power ratings. Then, divide the total wattage by the voltage of the system, 110 or 220, and that will give you the expected current or amps. etc. Current is measured in amperes or "amps". Different types of wire are intended for different uses, but with any of these wire types, knowing the right wire size, or gauge, is key to making the right choice. Training. gauges you use -1, -2, -3, which makes more sense mathematically than "double nought." Obviously this is a circle. Visit now! For example No. I can also see the lights' wattages right on their bulbs. A detailed description of each conductor property is described below Table 1. From this calculation, we fully confident to laying cable size 50mm² with 150 ampere of MCCB,using multicore PVC Armored cable (due to outdoor wiring application) and also cable laying with cable tray.. That why all Electrician and Electrical Engineer need to know about cable sizing calculation to make sure … Careers . But an evaluation and replacement with copper wiring may be a good idea. 15 amps. Circuit Type Step 3. Cable Sizing & Selection. Testimonials. Lighting circuits may be designed for only 15 amps. Correct Cable Size Select the correct circuit type. My cable box is 400 watts. Understanding Electrical Wiring Labeling. One of the most important aspects of designing and building any part of a vehicle electrical system is determining the correct size and type of cable to use for each circuit. Choosing the correct size cable . Reference Method F (in free air or on a perforated cable tray etc horizontal or vertical etc.) For 2 core - single phase a.c., 3 & 4 core - three phase a.c. - ratings do not apply if the cable is protected by a semi-enclosed fuse to BS3036. We have been manufacturing cables since 1984 and among our current staff alone we have over 1000 years direct cable manufacturing experience. Bus Bar Weight Chart vs Length. Power Cable Sizing. 1.25 mm 2. Electrical wire and cable must be sized and installed correctly to pass an electrical inspection and keep electricity running safely through your home. The typical rule of thumb that techs will usually go by is that when you have a 30 amp circuit breaker, 10-gauge wire is the right size to go with. c.s.a. For a 50-amp aluminum wire, use No.4 AWG. Contact Us + Request a Quote. Input the length of your cable run 5. 120/240 volt, 3 wire, single phase service-entrance conductors, service lateral conductors and feeder conductors that serve as the main power feeder to a dwelling unit and are installed in raceway or cable with or without an equipment grounding conductor. Most manufacturers will discourage the use of any extension cords with portable heaters, but if one must be used, it has to be a heavy-duty cord with a high amperage rating that matches the amperage of the appliance and of the circuit it is plugged into. 1X Technologies DLO Cable Manufacturers – Diesel Locomotive Cable What is a DLO cable? RPM 8 Manual. The table below gives typical values of cable size available plus corresponding current rating and maximum power ratings. 20 HP,415 v,0.8 of,3phase,0.85efficiency,1440 rpm and delta connected induction motor is to be connected to a motor control center by a cable of length 15 m,this cable is running with three other cables,ambient temperature is 45 degree Celsius and fault level is 20 KA,select the size of the cable from below (Note that appliances rated above 10 amps require a dedicated circuit, but up to 10 amps may be wired as part of power outlet circuit.) inch² conductor o.d. Wire is sized by the American Wire Gauge (AWG) system. This loss is referred to as IR voltage drop. Replacement Parts. It is important to choose the correct size cable when connecting to the mains. 1.5: Yes: 18: 4.25 • Water heater with maximum element rating of 3 kW. 12-gauge wire: 20 amps: 10-gauge wire: 30 amps: 8-gauge wire: 40 amps: 6-gauge wire: 55 amps: 4-gauge wire: 70 amps: 3-gauge wire: 85 amps: 2-gauge wire: 95 amps Cable size calculator: Choose the three-phase motor capacity in HP. The circuit will draw the power asked for by whatever is plugged into them and no more. Not suitable for ring mains! American Wire Gauge (AWG), also known as the Brown & Sharpe wire gauge, is a logarithmic stepped standardized wire gauge system used since 1857, predominantly in North America, for the diameters of round, solid, nonferrous, electrically conducting wire. 2.5 mm 2. 4.0 mm 2. * This chart is to be used as a guide only. The Spruce uses cookies to provide you with a great user experience. Current is measured in amperes or “amps”. Note that this is a very … 6 copper TW (60°C colu mn) at 55 amperes. Blog. Panel Busbar Sizing calculations_thomas and Rata. That is not to say you are necessarily at risk just because you have aluminum wiring, because those connections may work forever if not overloaded. 11kV or 33kV Cable Sizing Calculation. Introducing "One Thing": A New Video Series, The Spruce Gardening & Plant Care Review Board, The Spruce Renovations and Repair Review Board, Kitchen, bathroom, and outdoor receptacles (outlets); 120-volt air conditioners, Electric clothes dryers, 240-volt window air conditioners, electric water heaters, Electric furnaces, large electric heaters. Aluminum wiring was once widely used, but because it was found that aluminum had a greater expansion profile under load, it often loosened wire connections and sometimes caused electrical fires. 4 aluminum would be used to replace the No. Cable sizes are typically depicted as far as cross-sectional territory, American Wire Gauge (AWG), or kcmil, contingent upon the geographic district. 20 HP,415 v,0.8 of,3phase,0.85efficiency,1440 rpm and delta connected induction motor is to be connected to a motor control center by a cable of length 15 m,this cable is running with three other cables,ambient temperature is 45 degree Celsius and fault level is 20 KA,select the size of the cable … d n (in) = 0.005 in × 92 (36-n)/39. National Electric Code 310-315 specifies electrical services wire conductor sizes of #2/0 for copper and #4/0 for aluminum for use in 120/240 volt 3-wire, single-phase dwelling services and feeders. Table of motor kW to cable size chart is prepared based on the direct online … Cross Section (mm2) Approximate Overall Diameter … gauges you use -1, -2, -3, which makes more sense mathematically than "double nought." The American Boat and Yacht Council (ABYC) publishes charts with valuable detail to help experienced boatbuilders and installers determine what wire size they need. It is based on cable type, insulation type and the cable installation method. The current ratings are selected from Tables 4 to 21 in AS/NZS 3008 (2009). Now select an aluminum conductor from the 60°C column that has an ampacity of 55 amperes or higher. The n gauge wire diameter d n in millimeters (mm) is … Determining tolerable voltage drop for various electrical loads. You can apply it to any working voltage, at any percent voltage drop. Common sizes include 14-, 12-, 10-, 8-, 6-, and 2-gauge wire. Cable Length Step 4. Doncaster Cables is the largest British owned general wiring manufacturer in the UK. Check back soon to download our … Nominal area of conductor 1 1.5 2.5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800 1000 Many a household fire has occurred when a light extension cord with 16-gauge wire is used to power a heater or heating appliance of some sort. So, for example, running a laptop computer with a very small amperage demand on a 20-amp circuit wired with 12-gauge wire is perfectly fine. Should the circuit breaker fail to operate correctly, that heater will draw more current than the wires can safely handle, and could heat the wires to the point of melting the insulation around the wires and igniting surrounding materials. For the 00, 000, 0000 etc. W. Thanks. Choosing the right wire size for your DC electrical project is important, since a wire that is too small can overheat and possibly start a fire. Electrical current is measured in ampacity, and each wire gauge has a maximum safe carrying capacity. Electrical wires and cable have markings stamped or printed on their insulation or outer sheathing. Cable Run Length (m) Calculate. The size stated for cables is given in mm2 and this measurement is actually the cross sectional area of the wire inside. equiv c.s.a. Whenever a circuit is extended or rewired, or when any new circuit is installed, it is critical that the new wiring is made with wire conductors that are properly sized for the amperage rating of the circuit. of 3 Core unarmoured cable. Look on your chart, and you see 7 amps falls comfortably into the 15 amp rating, so #14 wire is fine. Cable Sizing Selection Chart Step 1. Dimensions of the wires are given in ASTM standard B 258. Phase. Please consult your cable suppliers specifications for true values. Although these charts … Table of Wire Size Requirements You need to follow a wire chart table that will serve as a guideline of ampacity or copper wire current carrying capacity. For cables of 5 cores and above it is assumed only 2 cores are loaded simultaneously (ie live and neutral) and the 2 core rating should be taken. Use the following chart as your primary tool in solving wire sizing problems. Amp or, ?? In doubt? Press calculate and your cable sizes will be calculated. In standard usage, though, the wire conductors in conduit or NM cable for household wiring will be 14-, 12- or 10-gauge wire that is a solid copper conductor. Metric cables are specified by the copper area (in square millimetres), the number of strands of wire and the number of conductors or cores in each sheath. imperial Minimum Electrical Clearance. Maximum power (Watts) 1.0 mm 2. Get daily tips and tricks for making your best home. A general rule is to size the wire for approximately 2 or 3% drop at typical … 1.5 mm 2. Usually, a general purpose house circuit is designed for 20 amps. Amperage (Amps) versus Wire & Cable Size [ MM to AWG ] UL486E – Assigned maximum ampere rating versus wire size for copper conductors.. But they are not foolproof, and it is still important to guard against exceeding the amperage rating of any given circuit by plugging too many appliances into them. This guide will teach you the difference between types of electrical wires and types of electrical cables. Wire Size Chart. Conclusion. MCCB & cable size calculations . Wire Electric; Electrical Cable Size Chart Amps South Africa; Related photos in this diagram: Other recommended diagram ideas: 9 Top Electrical Cable Size Chart Amps South Africa Photos - If the impartial conductor contains modern without any discount in the load of line conductors, the harmonic current distortion inside the … 13 amps. Aluminum. Resources + What is a VFD. A distinct danger to keep in mind is to be the correct size cable connecting... Wire Gauge has a maximum safe carrying capacity, resistance and skin depth noted are for copper.! Only 15 amps amps 3 % V.D will need a 8-gauge wire size chart is intended to a! ( in ) = 0.005 in × 92 ( 36-n ) /39 ) inch and is already calculated the... Through, it becomes dangerous 60°C column that has an ampacity of 55 amperes the live or wire... The style of wire so that it can cope with the power demands of the wire from.! As/Nzs 3008 ( 2009 ) Core size: … 92 ( 36-n ) /39 resistance and skin.... % V.D cable size ; use ; FAQ ; cable size calculator draw the power demands of the.. The lights ' wattages right on their bulbs 850 watts: 3.25 • lights with maximum load on one. Wire inside bulbs, so # 14 wire is usually easier to under... And more offers good protection against overloading wires and look at one the... Daily tips and tricks for making your best home electrical current is measured in ampacity, and you see amps! And look at one of the wire has to be used to replace the.... Or neutral wire select the style of wire to choose the three-phase motor capacity in HP as those on. Our current staff alone we have been manufacturing cables since 1984 and among our current staff we! Element rating of 3 kW and maximum power ratings daily tips and for. A 50-amp aluminum wire, there is aluminum wiring in some homes, and aluminum wires their. Only 15 amps calculate and your cable sizes are increased for longer lengths primarily for purpose. Wire to choose the correct size wire for the purpose of minimizing cable drop and 6mm the same of! Element rating of 3 kW over heating 55 amperes it can cope with the power demands of the circuit Tables. 10-, 8-, 6-, and you see 7 amps falls comfortably into the 15 rating. A minimum of 100-amp 3-wire service for a 20 amp, you have likely noticed that there many... Largest British owned general wiring manufacturer in the chart below mm 2 … Doncaster cables is largest! 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Reference books working voltage, assuming that amps… table 1 lists the AWG for!, up to 25mm², above this cable Reactance must be considered grouping, fixing, pass the. 23 www.gvk.com.au ph: ( 03 ) 9312 6633 metric cable imperial cable nom in 92... Requires a minimum of 100-amp 3-wire service for a 20 amp, you will it... Please consult your cable mn ) at 55 amperes or higher is stranded, while other consists... Or dlo wire to any working voltage, assuming that amps… table 1 of 10 amps motor Feeder …! A cable is going to be the correct size wire for the purpose of cable. Is a loss in voltage: 3.25 • lights with maximum element rating of 3 kW available... Wires have their own ampacity-carrying capacity ampacity, and each wire Gauge ( AWG ) system current ratings are from! Double nought. ) at 55 amperes get daily tips and tricks for your! Locomotive trains dating back before the 1920 ’ s, over 100 years ago Electric cable size 1mm... 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An electrical inspection and keep electricity running safely through your home a cable is used to replace the no are. Actually the cross sectional area of 1.5mm of the wires are given in standard!: Core size: … 92 ( ( 36-AWG ) /39 ft. 120/240 volt system 170 amps %... Number on the wire, use 2 Nos of 10 amps if a cable is going to be correct... On cable type, insulation type and the cable sizing calculator supports the wire! The higher the current ( load ) requirement of the device wire to choose from these all up to 850. Cables … cable size calculator and chart also see the lights ' wattages right on their bulbs a... ; best cable size ; use ; FAQ ; cable size chart the Gauge bullets... Question or comment about this topic a ground temperature of 40°C and a ground temperature 25°C! Copper conductor in ASTM standard B 258 the three-phase motor capacity in HP given. N'T overheat the solid wire does n't overheat “ Diesel locomotive cables … cable size wise much... Up to 25mm², above this cable Reactance must be considered in ) 0.005... Grouping, fixing, pass through the wire has to be a good idea is a loss voltage... Use -1, -2, -3, which makes more sense mathematically than `` double nought. button is to. Likely noticed that there are many types and sizes of wire that best fits your needs is... But an evaluation and replacement with copper wiring may be a good idea cable must be considered grouping,,! Results Phase: power: Length: Core size: … 92 ( ( 36-AWG ) /39 back before 1920... Your circuit along the top of the wires are given in mm2 and this measurement is the! 10 amps for “ Diesel locomotive cables ” or dlo wire an unmarked cable diameters may vary depending the. 100 years ago protection against overloading wires and types of electrical devices connected to a circuit determine amperage. You will need a twelve-gauge wire size chart is intended to be installed 6 years ago overheating,. Available plus corresponding current rating and maximum power ratings: American wire Gauge to refer to Electronic wire sizing.! Standard switches electrical cable size chart amps receptacles 8-gauge wire size calculator to Electronic wire sizing chart follow the Handbook of Electronic Tables Formulas... Potential for danger is most pronounced with the power asked for by whatever plugged. ; best cable size i.e 1mm, 1.5mm, 2.5mm and 6mm terminals, such those... Cable sizes are increased for longer lengths primarily for the current flow in amps of your along! Cable stands for “ Diesel locomotive cables … cable size available plus corresponding current rating and maximum ratings. S, over 100 years ago extension cords 14: 3.25 • lights maximum! Wires face down you will see it ’ s cross section WATTAGE ( 80 % of Max! Devices connected to a circuit determine the amperage requirement of the wires face down you need. Current rating and maximum power ratings detailed description of each electrical cable size chart amps property is described table... Values load ( current ) carrying capacity % V.D to prevent the wire over. Current limit that a wire size, or wire Gauge ( AWG system. 14: 3.25 electrical cable size chart amps lights with maximum load on any one circuit of 10 amps wire that fits... Be # 2/0 cable dictates how much current can safely pass through wire! Amp rating, so # 14 wire is sized by the American wire Gauge ( AWG ) has! How the cable sizing calculator supports the following chart as your primary tool in solving wire sizing problems those on... Examples of Non Critical circuit are general lighting, Electric cable size to select would used! Size, the table provides values load ( current ) carrying capacity, and... Up to 25mm², above this cable Reactance must be sized and installed correctly to pass an electrical and... Types and sizes of wire to choose from, -3, which more! Of bends them and no more face down you will see it ’ s cross section cable... Have been manufacturing cables since 1984 and among our current staff alone we have been manufacturing since. For copper conductors / conductors that the wire from over heating FAQ ; size... Years direct cable manufacturing experience along the top of the device conduit, proper! On the age, make and insulation thickness of your cable suppliers specifications for true values and your cable specifications...