Questions tagged [cables]

Questions about cable types, properties, ratings and construction.

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Identify kind of cable with markings such as "WE-B 2 PAIR" on the jacket

While cleaning out our back yard shed, I came across a coil of cable of a kind that I have never seen before (image below). It was left here by the previous home owner, who worked in some kind of ...
Bill Norman's user avatar
4 votes
0 answers
400 views

What is a short-circuit proof cable?

German norms and standards (VDE 250 Teil 602) specify, that wires and cables, rated for 3kV can be considered as "short-circuit proof" and "earth-fault proof" in low-voltage ...
syoma's user avatar
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3 votes
0 answers
326 views

Can RS-232 DB-9-compatible cable be used as a physical medium between two CAN bus DB-9 ports?

Note: I am not talking about connecting an RS-232 device to a CAN bus! I am strictly interested in reusing a RS-232 cable with two DB-9 connectors (one male and one female) to connect two CAN devices, ...
rbaleksandar's user avatar
3 votes
2 answers
149 views

Spiral hoar frost and spiral device around telephone or electric landlines

I live in Germany. When I travel by train, sometimes there are cables that run from pole to pole parallel to the train track. From the lack of insulation between wire and pole, I guess these are ...
user avatar
2 votes
2 answers
316 views

Splitting CB Radio Mic Inputs?

I just purchased my first CB radio and I am looking to split the microphone's output such that it can go to two outputs (the radio itself and custom electronics I plan to design). I'm using the Uniden ...
jimBeaux27's user avatar
2 votes
1 answer
449 views

Cable shield connection: ground or earth

I have an analog sensor which features 3 wires: power supply +, ground (common for supply and signal output) and signal output iself. Sensor is working in industrial environment. I am using shielded ...
XgN's user avatar
  • 31
2 votes
1 answer
1k views

How can I remove the label from heat shrink tubing?

I want to use heat shrink tubing on the jacks of an instrument cable I'm making (like in the photo below). The problem is that the tubing I have has a label printed on the side with the size and such, ...
1dareu2mov3's user avatar
2 votes
0 answers
4k views

Wiring problem while making couple of USB Type-C cables

1. USB TYPE-C to USB 2.0 Standard-A Cable Found this TYPE-C connector parts w/ 56k resistor from taobao, but there is no detailed circuit diagram on it. I want to make USB TYPE-C(device) to USB 2.0 ...
hunu's user avatar
  • 21
2 votes
2 answers
901 views

Fixing the pins in a flex cable

This is a flex cable from a kindle that connects the motherboard to the lcd. The pins at the edge are broken and not making any contact with the connector. Is there any salvation for this? If there's ...
WannabeeDIY's user avatar
2 votes
0 answers
683 views

Twisted pair with shield and drain wire

Ive been posed with a problem regarding calculating the characteristic impedance of a shielded twisted pair with a drain wire. While I understand how to calculate this for a "normal" shielded twisted ...
cstanto's user avatar
  • 181
2 votes
1 answer
125 views

What are the relations between analog transmission frequency and multipair cable types?

My question is a little theoretical about multipair cables. I want to have some basic understanding about the relation between the multipair cable types and application frequency, length and and EMI ...
user1999's user avatar
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2 votes
1 answer
108 views

Is it safe to use individual conductors removed from a multi-conductor cable?

I am working on setting up a research lab at a university as a graduate research assistant. We're working on power electronics in a three-phase environment, which means we'll be using at most five ...
Hearth's user avatar
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1 vote
1 answer
41 views

Fixing SMB adjustable contact to its SMB connector (Jack)

I recently purchased an SMB adjustable square flange jack connector: R114413000 [Partlink]. In the bag, I receive the adjustable contact and the connector: How do I fix this adjustable contact to the ...
AlveyFrost's user avatar
1 vote
0 answers
60 views

LED strip cable and connector sizing

I'm trying to power a LED strip. It contains 140 WS2812B with 60 LEDs/m so it is around 2.3 m. According to the datasheet, the LEDs has a 60 mA current consumption. Based on the pure math its 140*60 = ...
user2936050's user avatar
1 vote
0 answers
45 views

Why is the induced voltage due to the current of the phase conductor wrapped around the shield not included in the inducedvoltage calculation formula?

Why is the induced voltage due to the current of the phase conductor wrapped around the shield not included in the voltage calculation formula induced by the shield/sheath in the three-phase coaxial ...
Anthony Williams's user avatar
1 vote
1 answer
56 views

Is there a standard for JST/Molex low voltage digital connector pin configuration?

I am wondering if there is a standard for JST/Molex cable assemblies' pin configuration. I know there are three types of ethernet/CAT cables: Straight, Cross-over and Rollover. Does something like ...
the-dstrp's user avatar
1 vote
0 answers
525 views

Solderless SuzyQable without Breadboard

Is it possible to wire a SuzyQable without soldering and without a breadboard? Chromium documentation on how to wire the cable: https://chromium.googlesource.com/chromiumos/third_party/hdctools/+/HEAD/...
Craft's user avatar
  • 11
1 vote
0 answers
221 views

Identifying a communication protocol found on a RJ14 cable

I have a LED panel controller that can daisy chain with an another led panel controllers using a RJ14 cable to adjust a PWM that dims the panel. This is what I see on the RJ14 pins. A periodic signal ...
ESD's user avatar
  • 539
1 vote
0 answers
59 views

Calculating voltage and current of constant wattage loads along a very long cable

I am struggling with a calculation where I'm either missing something really simple or the maths is advanced beyond my current capability. I have tried rearranging wattage / ohms law calculations but ...
Christopher Ringwood's user avatar
1 vote
0 answers
157 views

What is the proper reference designator for a ring terminal in a cable drawing?

I am working on some cable drawings that utilizes ring terminals that connect on a relay terminal. Initially, I was using T as the reference designator for them, but I realized that is incorrect since ...
user3171804's user avatar
1 vote
1 answer
4k views

How to calculate power loss & voltage drop in three-phase power cables

What is the correct formula/method to calculate cable power losses in a three-phase system? I'm unable to find any IEC standard outlining the same. If you consider 3C/4C cables, the manufacturer ...
Jimmy Alfred's user avatar
1 vote
0 answers
70 views

Fiber optic transceiver for lower speeds

I am trying to figure out if a QSFP-DD transceiver can break out 8x 10G lanes if I make/use a 1:8 fiber optic breakout cable. It seems like most Transceivers are rated for one speed only, so if I get ...
bchang32's user avatar
1 vote
0 answers
68 views

Cable Issues with USB HS

We’re working on a product that makes use of USB HS, and are having some connection and consistency issues. Originally, our product was USB FS-based and we had no connectivity issues; with this second ...
snoopledorf's user avatar
1 vote
0 answers
55 views

Fiber Optical and 80Gbps MTP/MPO?

I am trying to get a cable solution to output 80Gbps of data. My FPGA is trying to input/output data. It has QSFP-DD cages. Fiber SFP+ cables (50um and multimode) need to interface to this. From my ...
bchang32's user avatar
1 vote
0 answers
967 views

Why don't LG RS232 commands work when the TV is on (only responds when off)?

I'm writing a new question after stumbling across this question which appeared to have similar symptoms: LG RS232 Commands partially working. As the other question noted, the power on command ...
tgpaul's user avatar
  • 49
1 vote
0 answers
278 views

Why do Electrical cables use the NY* naming convention?

I did some research on cables and found that most cable types are named like so: NYY/NYA/NYM. The weird part of this naming system is that its meaning does not match up with the abbreviations. For ...
penjelmaan katak's user avatar
1 vote
0 answers
56 views

time domain reflectometry pulse

Today I investigated a cable which is around 900m long. I used a TDR that injects a needle pulse into the system with a width of around 40ns. The needle pulse had an amplitude of around 2V. A ...
Yoomo's user avatar
  • 353
1 vote
0 answers
65 views

How does one properly strip coaxial cable to nonstandard strip lengths?

For my job, I need to put SHV connectors on a couple lengths of RG-59. I have the cable, the connector, and the crimping tool, but I've hit a snag: I don't have the slightest idea how to properly ...
Hearth's user avatar
  • 30.4k
1 vote
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38 views

Angel Eyes RGB LED Ring Light Wiring Extension

the cables aren't long enough and I want them to be black. Can anyone please tell me what this type of wire is called? It has four very small cores and runs on DC12V to supply power to four of these ...
Jay's user avatar
  • 51
1 vote
0 answers
777 views

Use USB-C alternate mode pins for custom signals?

I am working on a product that is made of 2 parts: a host with a male USB-C connector and a device with a female USB-C connector that plugs onto it. The plan is to use USB-C because it's a nice ...
coriv's user avatar
  • 71
1 vote
0 answers
676 views

Cable tray width selection as per NEC 392

I would like to ask if anyone know what is the meaning of the letter b used in the formula in the table 392.22 National electrical code 2017 article 392, pic (attached)
Aisha's user avatar
  • 11
1 vote
1 answer
150 views

Data + Power connector and cable suggestion

I need to decide about how to connect two custom designed electronic units. One is main (execution) unit, and the second is hand-controller unit. Those units have to be connected by wire. The ...
IgorEkis's user avatar
  • 189
1 vote
0 answers
175 views

Connecting CMOS sensor to (far away) PCB: understanding cable length

The problem is a bit complex due to the number of unknown parameters and my inexperience. I need a way to determine how far I can put the PCB from the sensor without problems in the transmission of ...
Cesco's user avatar
  • 49
1 vote
0 answers
68 views

What would you call a cable which combines both a coaxial transmission line and regular conductors?

I'm looking for a cable that can carry both dual supply (+5V and -5V at <100mA) DC power and a relatively high bandwidth analog signal. The intended application is powering the amplifier of an ...
jms's user avatar
  • 8,554
1 vote
0 answers
104 views

Simulating cable length during TDR testing

I am trying to create a circuit that can be used as part of a TDR simulator. What I need to know is if it is possible for the pulse that is sent out by the TDR equipment to be delayed by a piece of ...
Noj911's user avatar
  • 21
1 vote
0 answers
497 views

F type female to SMA male adapter impedance question

I have a coaxial cable that I need to connect to a SMA female connect. The impedance of the cable is 75 ohms, and from online the SMA female connect is 50 ohms. Online there are a few places that sell ...
learnmore's user avatar
  • 119
1 vote
0 answers
116 views

How is a power cord connector polarized?

For example, the common PC power cord cable (IEC 60320 C13). How is it polarized if you can just switch the power plug upside down (EU)? Does it have any internal circuitry?
pmiguelpinto90's user avatar
1 vote
0 answers
74 views

Cable Equations and/or Calculations

So, I'm on a placement as part of my final year of a Masters of Engineering Programme and the company have given me a task concerning a fault they may or may not have with one of their cables. ...
Ali Robertson's user avatar
1 vote
0 answers
233 views

How do I choose a twisted pair shielded cable?

The charging/discharging of a battery (1u to 30 mA) and remote voltage measurement is to be performed over 2 pairs of 2 m cable. In order to reduce picked up common mode noise I intend to use shielded ...
Andrey Pro's user avatar
  • 1,042
1 vote
0 answers
164 views

Using a MCP23017 for detecting open door/window

I'm not a hardware guy. My plan is to read input states using an MCP23017 connected to a Raspberry PI. My doubt is about the switching circuit. My plan is to use Ethernet cable pairs to wire the ...
cabbi's user avatar
  • 121
1 vote
0 answers
65 views

What is the correct way (read "correct way according to the law") to choose the section of a power cable in the EU and UK?

I am wondering if there is a standard process across the EU in particular Germany, France and the UK, for choosing the the section of a power cable. Suppose that: the cable is to be installed in an ...
mickkk's user avatar
  • 1,060
1 vote
0 answers
5k views

Best heating cable for a DYI heating blanket

I want to make an electric/heating blanket that will work with heating electric cable. I will use a computer AC adapter that output 19V 3.16A, and this dimmer to regulate the heat and a heating ...
MagTun's user avatar
  • 251
0 votes
1 answer
46 views

What are the outputs from my cable?

I am in the process of building a microphone connected to a Raspberry Pi Pico. To check my expectations are correct, I have bought a pre-assembled electret mic and amplifier. The issue I have, is I ...
user10709800's user avatar
0 votes
0 answers
74 views

How to connect cable shield when receiver side powers signal source?

I have element 'A', the receiver, connected to earth, which powers modules 'B' and 'C', the signal sources, unconnected to earth. 'B' sends a differential line signal, and 'C' sends an analog signal. ...
Tommy95's user avatar
0 votes
1 answer
24 views

Maytag MDB9100 connector to circuit board

I'm replacing the circuit board on my Maytag MDB9100 dishwasher. I'm having trouble connecting the white and black connectors on the bottom edge of the new circuit board. Everything else has been fine....
Marc's user avatar
  • 1
0 votes
1 answer
69 views

What's the Purpose of pin 44 on IDE cables

So I was looking at the pinout for 44 pin, notebook type IDE cables, and the 44th pin is listed as /TYPE : Type (0=ATA), what use does it have?
AussieHobbyist's user avatar
0 votes
0 answers
47 views

What to look for when selecting a cable for transmitting multiple types of signals in a moving environment

I'm working on a device that involves transmitting data between a microcontroller and an IMU device housed on a different PCB. The two are connected via a cable using a mini DIN connector. I've ...
E.HP.S's user avatar
  • 329
0 votes
1 answer
75 views

How to make an USB cable cross a door?

Note: I am torn between posting this here, SE DIY or SE IoT. Since this is related to powering on my smart devices and the electrical connection I need to use, I finally settled down on SE EE. Please ...
WoJ's user avatar
  • 517
0 votes
0 answers
21 views

Cable / Device Shielding

Is it required to connect Shield cover to the enclosure at several points in a defined way? I am doing EMC simualtion related to this and not sure on what changes I can make.
Rishab's user avatar
  • 31
0 votes
0 answers
108 views

AC - impedance for a coaxial cable

Problem I want to calculate the AC impedance for a coaxial cable. A rough image is presented below: Because we have an AC current, suppose that the skin depth, which we can define as \$\delta\$ is ...
Tanamas's user avatar
  • 313