Questions tagged [cables]

Questions about cable types, properties, ratings and construction.

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2answers
51 views

Best way to interface panel mount buttons as this one

I need to work on a panel for an industrial product. The idea is that the signals from these buttons go to a PCB with an MCU which then communicates with a central MCU about the state of these buttons....
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1answer
32 views

reading specification sheet of a cable

I'm having trouble reading the following specification sheet: https://www.molex.com/pdm_docs/ps/PS-15166-001-001.pdf if it doesn't work, I just pressed the datasheet button in this product: https://...
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1answer
41 views

DVI Hot Plug Detect

I am making a custom cable from a VPX backplane to a DVI-I connector, and need to know if the DVI cable will work ok with a standard monitor if I do not wire up the hot plug detect pin. I will never ...
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2answers
103 views

What are these wires in my switch? [closed]

I’m working on an Arduino project for switching my light with it, but in my switch, there are two wires (if I count in/out as one.) I don’t know what the second one is. When I measure voltage between ...
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1answer
98 views

How to disconnect this kind of cable connector?

I'm trying to disassemble a part of my washing machine to clean it, but I'm struggling removing a white plastic cable connector. Here's a picture of it I've tried removing it by twisting it, and with ...
3
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0answers
63 views

What determines the voltage rating of a cable?

I'm trying to figure out the maximum voltage of some cables in a vacuum system I've inherited, and I'm confused by the DC voltage ratings given by this supplier as they step from the 3 kV to 10 kV ...
3
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1answer
95 views

What is this connector/plug called?

I have found this cable several months ago with old electronics (it is more than 5 years old, I'm sure.) For more than a week, I have been looking for the type of plug shown in the photos on internet ...
0
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1answer
63 views

How to wire up two RJ45 sockets?

I'm having a hard time getting my head around this! It ought to be simple, but ... I have an internet feed at one end of my house with a small router/modem thing. From there I connect a Cat-5 cable ...
0
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1answer
52 views

How can a cable tester verify correct shielding/twisting of wires?

Background: The company I work for makes a variety of special-purpose cable assemblies to go with equipment we make. The people who build these cables aren't doing a 100% reliable job, and nobody ...
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2answers
58 views

Calculate maximum allowed current of a cable with AWG, length, and voltage? [closed]

How can I estimate the maximum current of a cable with thickness, length, and the voltage? Assuming that the material is cheap aluminium, not expensive copper, and in room temperature. For example, ...
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7answers
3k views

Cable standard for data and power

I am looking for a cable standard to control and power a device from its controller. I need to send 5V/10A but also control (not sure yet what protocol it could be but I don't need a high speed, 9600b ...
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1answer
41 views

How do I connect micro Molex to nano Molex socket?

I have a Molex cable that has a bigger size than its socket. My problem is how do I connect the cable to its socket? I sent this picture about comparison cable and the nano socket exactly in front of ...
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0answers
32 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 ...
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1answer
92 views

What happens inside this duct?

At the top are wires coming out of a terminal block. On the left are gray tubes running into a cabinet full of sensors, motors, etc. Are these gray tubes conduits or cables? What is happening at the ...
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2answers
94 views

Is there a design tool that tells you what gauge of wire to use? [closed]

Do any circuitry design tools (5spice, etc.) have a feature that tells you what currents you'll have in each wire/cable, and recommend therefore which gauge of wire or type of cable to use for each ...
4
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1answer
824 views

Convert 'dB per 100m' to 'dB per 1m'

I want to know about wire loss per meter. However, in the datasheet, it is written that 6.1 dB is attenuated per 100 meter, so I wonder if it is possible to simply calculate 0.061 dB if I want to ...
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2answers
79 views

How to describe the basic cabling used in industrial electrical panels?

How would the basic cabling in electrical panels be technically described (in order to make a purchase, for example?) Does it have a certain number of cores? I'm talking about the kind of cabling you ...
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1answer
101 views

Lazer wifi connection [closed]

Would it be possible to create a Wifi cable that uses lasers to send information at light speed?
0
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2answers
91 views

Ethernet over individual wires

I am doing the integration of an aircraft device that uses Ethernet 100BASE-T as its main communication line. The manual says the device comes with its own testing cable which is approximately 2 feet ...
1
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1answer
83 views

What is this USB mini-b like cable?

What is the cable on the left? It is supposed to be a cable for audio input for older gopros (in my case the 2014 hero), but my GoPro uses USB mini-b and this won't plug into it. I ordered one and ...
0
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1answer
64 views

Stereo Headphone Cabling (TRS) - Why 4 pads on L loudspeaker and 4 cables?

The R(ight) loudspeaker on my AKG-K99 headphones stopped working. I bought a replacement (x2) 'mini' loudspeaker. After soldered the replacement the sound was "weird". No problem. I ...
0
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6answers
388 views

Cables with different cross section having the same max allowed current?

I was looking to buy a power cable recently and my eye caught this weird fact. Look at these two cables: https://www.savio.net.pl/en/product/savio-1-8-m-schuko-m-power-cable-iec-c13-cl-138/ https://...
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1answer
136 views

My IC pins are too small

I bought an IC, but the little pins are too small to fit into the female end of the wire. I do not want to use a breadboard or solder the wires. Are there any solutions?
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0answers
37 views

Medium Voltage Cables

Concerning medium voltage cables, 12/20 kV, 50 Hz I would like to ask two questions 1)What is the difference between these two types of cables: N2XSY N2XS2Y As far I know the difference is the ...
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1answer
50 views

Current from HDMI cable [closed]

I recently purchased a cheap monitor from amazon for using with my laptop. It has a HDMI and VGA output. I also have a speaker connected to my laptop. when I connect the HDMI cable to my laptop my ...
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2answers
85 views

The meaning of cable should be wound around cylindrical ferrite

What is the purpose and meaning of a cable wound around and passed through a cylindrical ferrite, that black non-conductive ceramic metal ?
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1answer
47 views

What type of wire would be "best practice" for extending stepper motor leads?

I've been using unshielded "communication and security system cable" (https://www.mcmaster.com/8280T32-8280T321/) for running cable to connect stepper motors to motor controllers. I haven't ...
0
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3answers
120 views

How thick would a cable have to be for sustained current of 300A?

Background I'm daydreaming of a future where all cars are electric and wondering how actually feasible it would be. Obviously there are many challenges left for that, but for me (and millions of other ...
0
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0answers
30 views

What does pole rating and bipole rating mean for HVDC transmission cables?

I was just reading on HVDC underground cables. And according to the picture below, as they were listing out the parameters of the cables used, they mentioned pole ratings and bipole ratings. How are ...
0
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3answers
209 views

Cable selection and wiring for RS485 communication

I'm designing a sensor system where each sensor communicates via RS485 MODBUS in a high-density environment. Each line consists of 18 sensors which then goes to a gateway (Elfin EE11) that converts ...
0
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0answers
29 views

RF Amplifier GND/VCC Connector [duplicate]

Is there a standard connector used to connect the ground/supply pins on an RF amplifier to a power supply? For example, many RF amplifiers (also attenuators) I've seen use two pins like this: But I ...
1
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1answer
52 views

Motor power rating and in-rush current

I'm looking to replace the cable of a mains (UK 230V nominal +10/-6) appliance, essentially just a motor, rated at 180W. The existing cable has a 3A fused plug; my options to replace it (restricted ...
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1answer
67 views

Water heater power cable has changed color

Couple of years ago I've installed an electric water heater in my toilet room (a model similar to this one). It's a kind of water heater that has a big tank of water with heating elements inside. ...
1
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1answer
47 views

Can bike/motor brake (and/or) gear shift cables used as a conductor

I am a mtb rider and my bike has green/black theme going on. There are not many green (especially neon) sleved cables around. (Nor the heat shrinks' green match the bikes'). I do not want to interfere ...
33
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2answers
4k views

What are those weird wires in the audio cables?

Trying to repair a headset cable, I discovered that it doesn't look at all like the “ordinary” cables I used to repair. I was expecting to see, inside the cable jacket, four wires, each one in a wire ...
0
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1answer
209 views

Adding Push-To-Talk (PTT) / Mute to 3-pin XLR Cable

Is it possible to add PTT/Mute to a 3-pin standard terminating XLR cable (with +48V phantom power)? In my case, I have found myself with a Astatic 40-119 microphone base with a PTT switch that "...
0
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0answers
19 views

Routing multiple video and power through one multicore cable

I currently have three cctv camera feeds each with a dedicated cable, I assume a 4 or 3 core of some layout (not sure if this is shielded or otherwise). Currently each cable has a dc pair end ...
2
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3answers
192 views

BNC Cables and their impedances

V1=10 V(peak to peak), frequency of voltage source = 1kHz, D1 is a standard 1N4007 Silicon Diode, R1=10 kilo ohm (the load resistor) In our electrical lab, we were given the circuit shown in the ...
0
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1answer
39 views

Twisted triple wires when current is balanced

Twisted pair cables are supposed to be effective for differential signals since the current flow is equal and opposite. If I have three wires such that the total current is also zero (say, +5V, GND, -...
0
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1answer
354 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 ...
0
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0answers
35 views

Raspberry Pi : White/Blank screen with new shielded cable

I'm currently passing EMC tests at a test lab. For the purpose of the tests, I made a custom DSI cable for the official Raspberry Pi 7" screen with shield against EMI as the PCB of the official ...
0
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1answer
38 views

Max current for a H.FL75 cable

I'm looking to find the maximum current rating that a H.FL75 cable can handle. Particularly this cable... https://www.mouser.com/ProductDetail/798-HFL752LPG084N2A However, I cannot seem to find any ...
1
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0answers
43 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 ...
1
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0answers
55 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 ...
2
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1answer
49 views

What DSUB9 to DSUB9 cable is this?

I'm sorry if this is the wrong use for stack exchange. I'm sure I will be notified by users if it is. I have inherited a (female) DSUB9 to (female) DSUB9 cable from a very old project. The pinning ...
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0answers
39 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 ...
0
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1answer
57 views

USB-C to USB-A to Micro for charging

The project is to add 2 USB-A ports to my bass amp so I can charge my device(s) during a gig. To do that, I bought a 2-port USB panel mount connector (intended to connect to a motherboard) and a 2-...
0
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0answers
57 views

Name of a single-conductor coax test cable

Alright, bit of a silly question but I can't seem to get Digikey or Mouser to show me what I want. I'm wanting to replicate Fig. 7 of this INA116 datasheet almost exactly. Before I go and buy this ...
0
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2answers
49 views

How sensitive are laptop barrel jack sizes?

In particular, is a barrel jack described as 1.35mm x 3.5mm likely to work with a socket made for a 1.3mm x 3.4mm jack?
1
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2answers
203 views

If I use twisted pair cable for I2C, should I twist SDA with SCL or both with the ground/power?

I need to design about 1 meter cable for I2C communication. It contains 4 wires, SDA, SCL, ground and power. I plan to use the shielded cable with the shield grounded at one end only. It looks ...

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