Cable Definition and 611 Threads

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...

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...

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...

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...

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...

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...

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...

Homework Statement [FONT="Georgia"]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...

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...

"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...

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...

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...

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...

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 =...

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...

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...

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!

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...

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...

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...

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...

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...

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...

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...

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...

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...

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!

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...

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...

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...

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...

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...

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...

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 :-)

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 :-)

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...

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...

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...

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...

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

Homework Statement If I have two co axial conductors at V = 0 and the dielectric has a free charge density. Is that physically possible? Homework Equations No relevant equations The Attempt at a Solution I am not sure if you can have free charge density in a dielelctric when both conductors...

Homework Statement Type P241B coaxial cable has an inductance of 0.4 μH/m and a capacitance of 40 pF/m. The diagram below shows a 100 m length of this cable connected to a battery and switch at the sending end and a 50Ω resistor at the receiving end. (a) If S is closed, what initial current...

Homework Statement Problem's pic: http://i92.photobucket.com/albums/l18/bonbons06/steelBeam01.png Steel construction beams, with an industry designation of W12 × 22, have a weight of 22 lb per foot. A new business in town has hired you to place its sign on a 4.0 m long steel beam of this...

I think it's amazing that by 1860s the industrial revolution was advanced enough to make huge commercial projects possible: http://en.wikipedia.org/wiki/Telegraphy That was 150 years ago.

Homework Statement A coaxial cable of circular cross section has a compound dielectric. The inner conductor has an outside radius a , which is surrounded by a dielectric sheath of dielectric constant K_1 and of outer radius b . Next comes another dielectric sheath of dielectric constant...

so i know that when there is a cable hanging from say a building that is taller than the length of the cable and you want to find the work done lifting half of the cable, you have to split the integral up since each "small piece" of rope in the first half gets lifted up a variable amount while...

Homework Statement Hi all, I have this project i have to write but i am having trouble getting the necessary materials to aid my writing. The project topic is the influence of crossing angle on amplitude in cable to cable coupling. It is a magnetic coupling problem and i am supposed to design...

Homework Statement http://img163.imageshack.us/img163/7491/staticsk.jpg Those weird squiqqles are supposed to represent springs. Not exactly an artist :D Homework Equations F = kx The Attempt at a Solution After drawing a fbd and breaking the tension into x and y components...

A fiber optic (n = 1.5) is submerged in water (n = 1.33). What is the critical angle for light to stay inside the cable? i am so confuzed. this is the final question of my paper and i am stuck on a couple questions before this so it is obvious i would get this. i just need a start please.

Homework Statement The coaxial cable from a television or other device has an inner conductor with diameter of 1 mm and the shield of diameter 5 mm. Assume a plausible value for the dielectric constant (3 ≤ κ ≤ 5) of the dielectric separating the two conductors and calculate the capacitance...