Cable Definition and 629 Threads

A cable layer or cable ship is a deep-sea vessel designed and used to lay underwater cables for telecommunications, electric power transmission, military, or other purposes. Cable ships are distinguished by large cable sheaves for guiding cable over bow or stern or both. Bow sheaves, some very large, were characteristic of all cable ships in the past, but newer ships are tending toward having stern sheaves only, as seen in the photo of CS Cable Innovator at the Port of Astoria on this page. The names of cable ships are often preceded by "C.S." as in CS Long Lines.The first transatlantic telegraph cable was laid by cable layers in 1857–58. It briefly enabled telecommunication between Europe and North America before misuse resulted in failure of the line. In 1866 the SS Great Eastern successfully laid two transatlantic cables, securing future communication between the continents.

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  1. B

    Help Joanne Solve Cable System Tension Issues

    I am trying to solve the tension in the cable system and I can not get to the answer. See attached file for question 4-4 and 4-6. I have no clue as to what to do with the 100 kg weight on the 4-4 problem. As for 4-6. I came up with 7 T at the p arrow, and when I multiply that to 3 for...
  2. B

    PCI Express (PCIe) Cable for board to board link

    Is there a PCIe cable system available that attaches to a standard PCIe Board Edge Connector or Mother Board PCIe slot? I see Molex has the iPass cabling system for PCIe board to board connections. But based on the Molex connection pinning (68pins for x8 PCIe) it is more of a custom solution...
  3. P

    Find Tension of cable and momentum about point

    Homework Statement A door is held open by a cable, which is vertical, and the door is 200kg (its center of gravity is midway along the door). Calculate the tension of the rope and the momentum at the hinge A for angle theta = 30 degrees. Picture here: http://i54.tinypic.com/160wqxk.jpg"...
  4. P

    Work done lifting cable against gravity

    Homework Statement A cable weighing 2 pounds per foot of length (and so having a mass of 2 pounds per foot) is suspended from the top of a well 200 feet deep and extends to the bottom. Find the work done in raising the cable to the surface. Over the distance of 200 feet you may use 32m as the...
  5. K

    How Does Gauss' Law Apply to Coaxial Cable Charge Distribution?

    Homework Statement A high voltage coaxial cable is used to supply power to an x-ray generator. The cable consists of an inner wire of radius r=1 mm and a thin hollow outer conductor of radius R= 10 mm. The inner wire and the outer shield have the same charge density per unit length of ...
  6. E

    How to Connect a 3-Core Armoured Cable to a 3-Pin Socket?

    Hi I am trying to find out a way to connect a 3 core cable (armoured cable) to a 3-pin socket... what would be the best way to go about doing this ?? any help would be appreciated regards
  7. X

    How to conduct continuity test for cable sized 250 sq. mm?

    Good day everyone! I would like to ask if it's ok to use a digital or analog multi-tester in testing a 15 meters, 250 sq.mm cable? We are tracing buried cables from the main circuit breaker to the concrete post. We are connected to Delta X'mer, 230 V, 4 wire w/ ground System. The x'mer will...
  8. B

    Cable on a Table (classical mechanics)

    Homework Statement A perfectly flexible cable has length l. Initially, the cable is at rest, with a length of it hanging vertically over the edge of a table. Neglecting friction, consider the cable's motion as it slips off the edge of the table. (a) Show that the length hanging over the edge...
  9. S

    Free Fall and Tension in a cable

    Homework Statement A crate is hanging from a cable as shown in the diagram. A monkey that is inside the crate, sits on a ledge that is 1.225m above the bottom of the crate. The monkey steps off the ledge and when he hits the bottom of the ledge, it takes .125 s to stop. The tension in the...
  10. P

    Need help finding the electric fields in a coaxial cable with charged conductors

    Homework Statement A coaxial cable consists of a long solid inner cylindrical conductor, radius a, and a thin outer cylindrical conductor of average radius b>a. Suppose the inner conductor has a line charge density of +lambda while the outer conductor has a uniformly distributed charge of...
  11. M

    How Does Current Direction Affect Magnetic Field in a Coaxial Cable?

    A coaxial cable has a conductor lying at the centre of a thin walled cylindrical conductor. These conductors are separated by a plastic dielectric, and they carry equal current in opposite directions. The radii and current are given, and I must find the magnitude and direction of magnetic...
  12. J

    Ethernet cable attracting lightning

    I ran about 200 ft of ethernet cable around the back of my house from my computer room to my bedroom, to stream netflicks. I tried wireless but I got tired of constant signal lossl and movie break-ups, hence the reason for direct wiring . The cable is run in 3/4 grey pvc buried about 5 to 6...
  13. P

    Correlation between a car's horsepower and maximum strength of Cable

    Science quiz question: How to determine the correlation between a car’s horsepower / torque and the maximum break strength of a cable that will hold the motor stationery. Assuming that the wheels of a car do not spin, how can I determine what the required cable’s break strength needs to be...
  14. R

    Coaxial cable problem, electric field strength?

    Homework Statement A coaxial cable has an inner core diameter 6mm and inner diameter of the outer sheath is 20mm. There are two layers of insulation between the conductors, the inner layer from a radius of 3mm to 9mm has relative permittivity of 8 while the outer layer from radius 9mm to...
  15. V

    The Arc length of a cable hanging from two poles x feet apart.

    Homework Statement I appologize if this is in the wrong topic. But, I need help with the. I know you guys don't exactly give out the answer, but I'm looking for a particular rule of something that will help me. My calculus professor told me to use any available resource to solve this problem...
  16. J

    Solve Cable Torque Problem: Find Hcomponent Force on 23.8 kg Beam

    Homework Statement A 23.8 kg beam is attached to a wall with a hinge and its far end is supported by a cable. The angle between the beam and the cable is 90°. If the beam is inclined at an angle of theta=30.7° with respect to horizontal, what is the horizontal component of the force exerted...
  17. jtbell

    Cutting the cord to cable and satellite TV

    "Cutting the cord" to cable and satellite TV Last year, fewer people in the US subscribed to cable or satellite TV. The only areas with increases were the largest metropolitan areas. People are wondering how much of this is due to the economic downturn (with many people needing to cut spending...
  18. K

    What is the Time Required for a Diver's Signal to Reach the Surface?

    A deep-water diver is suspended beneath the water surface by a 100-m long cable. The diver and his suit have a total mass of 120-kg and a volume of 0.0800-m3. The cable has a diameter of 2.00cm and a linear mass density of \mu=1.10\mbox{kg/m}. a) Calculate the tension in the vable a distance x...
  19. J

    Mass on a tensioned cable with axial/transverse oscillations

    Homework Statement This problem isn't actually assigned homework for me, but I wanted to see if I get the concept. Any feedback and corrections to my answer would be appreciated! A cable is stretched between two anchors, and a small mass is attached to the cable, through the center of the...
  20. L

    Cable length dynamics by adding twists to cable

    Hi, I am an avid archer and am about to begin making my own strings for myself and others compound bows. I am searching for a formula to help me calculate the appropriate length of string material needed to build a string that will equal a certain length after pre stretching and adding twist...
  21. S

    Finding tension in a cable of a accelerating lift

    A lift has mass 800 kg. It is moving upwards and has an accerleration of -0.1 ms-2. The lift is supported by a single cable. What is the tension in the cable? I get T = -7760 N (I'm taking up as negative), just checking what anybody else gets F = ma T + mg = -(-0.1)m T = 800(0.1...
  22. E

    Calcuate Elastic Modulus of metal cable

    Homework Statement A mass of 225 kg is hung from a metal cable of length 1.60m and diameter 8.20mm. This causes the cable to stretch by an amount 0.668mm. Calculate the Elastic Modulus of the metal. Homework Equations E=(F/A)/(change L / orig L) The Attempt at a Solution F =...
  23. Q

    Charged coaxial cable - Charge distribution?

    Homework Statement Say we have an infinitely long wire with radius r1 with a linear charge density +u and we have a coaxial conducting cylinder with radius r2->r3 and a linear charge density of +2u. http://img573.imageshack.us/img573/3419/coaxialcable.png" Now the overall aim of the...
  24. L

    Determine the tension in cable BC and the reactions at A.

    Homework Statement The 400N weight of member AB acts at its midpoint. The length of member AB is 3m. Determine the tension in cable BC and the reactions at A. Homework Equations m=rxf? maybe simple force equations The Attempt at a Solution Not sure whether to use sum of all forces...
  25. S

    How are cable sizing calculations performed?

    Can someone please guide me (with an example if possible) on Cable Sizing Calculations. I want to learn the step by step procedure alongwith calculations that are performed during the preparation of Cable Sizing Documents. Thanks in advance!
  26. J

    Force of a cable through a cylinder

    Homework Statement I was hoping you'd be able to help me out with a mechanics question. This isn't a homework question, more an independent design question, so the information on the problem will be primarily symbolic. I'm trying to model the force that the cable passing through the cylinder...
  27. W

    Find the tension in a cable and the reaction about a point

    Homework Statement Find the tension in the cable CD and the reaction at point B. a=1.5 m w= 50 kg http://img821.imageshack.us/img821/5595/cusersjoshappdatalocalt.th.png Uploaded with ImageShack.us Homework Equations Sum of forces=0 Sum of moments=0 The Attempt at a Solution I'm not really...
  28. C

    Electric Field outside a Coaxial Cable

    Homework Statement Consider an 8mm diameter coaxial cable, which consists of a central conducting wire, and an outer cylindrical conducting braid. If a charge of +30mC is placed on the inner conductor, and a charge of -30mC is placed on the outer conducting braid, what will the electric field...
  29. W

    What is the Tension in a Cable?

    Homework Statement a) A rectangular plate is supported by three cables. Knowing that the tension in cable AB is 405N, determine the force at B. b) For the plate in the above question determine the force in cables AB and AD knowing that the tension in AC is 54N. The Attempt at a...
  30. S

    Extruder Head: Cable manufacturing

    Hi, I'm having trouble producing 22 AWG polypropylene cable. I keep on getting "missing insulation" and "reduced insulation". The Extruder Head I'm using is quite old and I'm not sure that it is "centered". But a mechanical engineer told me not to worry, it doesn't mater if the Head is...
  31. S

    Extruder Head: Cable manufacturing

    Hi, I'm having trouble producing 22 AWG polypropylene cable. I keep on getting "missing insulation" and "reduced insulation". The Extruder Head I'm using is quite old and I'm not sure that it is "centered". But a mechanical engineer told me not to worry, it doesn't mater if the Head is...
  32. S

    Efficiently Test FTP Cat 5 Cable: Tips & Tools for Accurate Results

    Hi, I've just bought 15,000 meters of Foil Twisted Pair cable (2 PVC insulated conductors and a Drain wire with Aluminum Foil around them) and I'm trying figure out if it will be good enough for Cat 5. How should I test it without having to chop it down to smaller pieces? The test...
  33. S

    Electric cable in a Vertical Tube: Estimate the Conductor Temperature

    Hello, I have an electric cable in a vertical steel Tube. I estimated the temperature that will reach the JTube exposed to sun radiation. I came with these equations QCable+ Qsun - Qradiated = mc( Tfinal - TAmbient) where QRadiated= k.A.(Tfinal^4-TAmbient^4), QSun=234 [W/m^2] * A...
  34. D

    Crate on a cable statics question

    Homework Statement Please refer to the attachment.Homework Equations Sum of x and y forces = zero Sum of moments about any point = zeroThe Attempt at a Solution By looking at the portion of the string under the crate, there are 3 forces acting on it, namely the two tensions at the side and the...
  35. E

    Medium Voltage Cable Cable sheat integrity test

    Can sombebody help me where i can get the test procedure for cable sheat integrity test for medium voltage cable, as per IEC 60229 STANDARD?. and does anyone knows where i can get the free pdf of IEC 229?.. PLS . i need some help. thanks!
  36. S

    Wire Cable Shock Load Calculation

    Hello, we are doing an activity at work to calculate what the shock load would be on a wire cable under the following conditions. There is some conjecture on how best to do this so we figured it would be best to ask some people with bigger brains than us ;) Hopefully the following info is...
  37. C

    Can I Trim a Flat Flex Cable to Fit My A/C Unit?

    Hi, I apologize if this isn't the right forum for this. I tried to pick that which I felt was most appropriate. My question is about 'flat flex cable'. Somebody I know recently purchased an A/C unit which uses a flat flex cable to connect the control board to the motor and such. They would...
  38. N

    What is the Solution for a Smartboard 580 Cable Issue?

    firstly hello. second my problem is i bought a smartboard 580 (touchscreen dry erase board) at an auction. it came with nothing doing some digging i found a schematic for the cable required to connect the board to my computer: http://www2.smarttech.com/kbdoc/186" now i have tried to make this...
  39. J

    HDMI cable wiring schematic (what colors go where)

    Hi, I was hoping somone on this forum could help me out. I am not an engineer (although I wish I was). I am just DBA that is dealing with a wiring nightmare. My boss bought an HDMI to VGA cable from some guy on line for hooking up a laptop to a TV. The cable comes in and of course is no...
  40. E

    Pulley, two objects, frictionless plane; find acceleration and cable tension

    Homework Statement A box of mass m1 is hanging from a cable of negligible mass, The cable rounds a pulley, where it is connected to a second box of mass m2 on a frictionless plane. The angle of the inclined plane is \theta as measured from the flat ground. Both boxes are initially at rest...
  41. S

    More help for size of optical cable

    One more question ,is there how can i decide for my fibre cable type, how can i check the bandwith . normally how can i know the sensors (proximity,capacitive,etc.) bitspersecond of sensors and limit switches,so that it will fit the desired optical cable bandwith. i am in a confusion whther...
  42. I

    Calc. the deformation of a cable on a reel

    I want to see what effects placing a steel cable on a reel of size of OD 3,51 m will have on the properties of the material? How will I go about doing this? A appreciate any help I can get :-)
  43. I

    Calc. the deformation of a cable on a reel

    I want to see what effects placing a steel cable on a reel of size of OD 3,51 m will have on the properties of the material? How will I go about doing this? A appreciate any help I can get :-)
  44. T

    How Much Weight Can the Sign Hold Without Breaking the Cable?

    Homework Statement A 120-cm-wide sign hangs from a 5.4 kg, 200-cm-long pole. A cable of negligible mass supports the end of the rod as shown in the figure. What is the maximum mass of the sign if the maximum tension in the cable without breaking is 380 N?Homework Equations \Sigma \tau = 0The...
  45. S

    Coaxial cable with unequal currents

    1. Homework Statement I just have a question concerning an unbalanced coaxial cable. By unbalanced, I mean that the inner and outer currents are not equal magnitudes of the opposite direction of each other. My homework problem has an inner current of +100[mA] and an outer current of 90[mA] in...
  46. S

    How Does an Unbalanced Coaxial Cable Affect Enclosed Current Calculations?

    Homework Statement I just have a question concerning an unbalanced coaxial cable. By unbalanced, I mean that the inner and outer currents are not equal magnitudes of the opposite direction of each other. My homework problem has an inner current of +100[mA] and an outer current of 90[mA] in the...
  47. V

    The Magnetic Field of a Coaxial Cable

    Homework Statement A copper wire is surrounded by insulation, then a copper mesh, and then an outside insulation. Assume the current in the inner conductor is going into the page and an equal magnitude of current is flowing out of the page in the copper mesh outer conductor. a. Which...
  48. DaveC426913

    Solving Rogers Cable TV Reception Issues

    I'll get to asking the right people, but first I should get my ducks in a row. My Rogers cable TV reception through my PVR box is crap. Recently, watching shows in the evening, it might freeze for several seconds maybe fifty times over an hour. Right now I'm weatching OMNI2. Last night it...
  49. M

    Pulse Through Cable: Solving Part A and B

    Hi, this is the question: For part a) I did V=(L/C)-1/2=2.5x108 m/s. And then I said T=x/v where x=10m, so T=4x10-8s. For part b) V++V-=VL...since it's the first wave I suppose there wouldn't be a reflecting wave yet, so V-=0. I have an equation that says V+=[VL/2](1+R0/RL)...since...
  50. C

    How Is Tension Measured in a Cable?

    Can anyone help me with a general working principle for the measurement of tension in a cable?
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