All Questions
Tagged with wire power-supply
38
questions
4
votes
1
answer
529
views
Manufacturer amperage rating for cables VS ampacity chart
Whenever I am shopping for electrical cables on stores such as Amazon or Ebay, I often encounter cables with a maximum amperage rating that is way above what I can find in "ampacity charts". ...
- 43
5
votes
1
answer
2k
views
Is it safe to swap positive and negative on a barrel plug?
I have just enough knowledge about electrical stuff to get in trouble... So that is my background, and hence why I am asking before I do something stupid.
I have a device I want to power that is ...
- 61
1
vote
2
answers
262
views
Difficulty telling live wire and neutral wire apart - building extension cord [closed]
I would like to build an extension cord, and have bought: 1) the plug; 2) the power strip; 3) the cable. I am running into a problem: the power strip clearly states that when connecting the cable to ...
- 11
0
votes
0
answers
137
views
Wire size: is a 16 AWG wire the same 3x 23 AWG wires?
I'm building an LED installation and I was wondering if I could use the cat6 cables I already have. I've calculated the needed wire area to be 16 AWG (D 1.4mm, 1.65mm2) (for 5 meters).
Would this be ...
- 19
0
votes
2
answers
72
views
What kind of wire terminator is this for computer power supply fan?
Trying to determine the style of wire-terminator used here so I can buy a few. What is this called? It's on the wires for a three-wire fan used in a desktop's power supply.
- 123
0
votes
1
answer
514
views
What type of wire can I use to run 5V, 30A to my Arduino controlled relay module over a distance of 10-12m?
I'm building an Arduino-controlled Christmas light show. I power my 16-channel relay module with a 5V, 30A supply. It is placed outside the house and I want to place its power supply powering the ...
- 3
0
votes
3
answers
9k
views
WS2811 series: power consumption and voltage drop
I recently bought some WS2811 LED strips (these). I intend to connect 6 in series (6 * 50 = 300 leds), and I have some questions.
In the datasheet and on the Amazon page it is written that each LED ...
- 101
1
vote
0
answers
149
views
Does a 12V cable of an ATX power supply have an overcurrent protection on its own when more current is drawn than the cable could withstand?
I want to use an old ATX power supply to power a project of mine. For that I'd like to utilize a single 12V cable from the 20 pin connector which is 18 awg and therefore can safely handle around 6 ...
user288846
0
votes
1
answer
145
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, -...
- 15
0
votes
0
answers
89
views
Power 100+ 5v LED matrices
I'm trying to power over 100 LED matrices laid out in a long, single chain similar to a stock ticker on news buildings. I do have the control part figured out but bringing power to the matrices is ...
- 11
1
vote
1
answer
201
views
IR drop in wires
I have 2 wires (18AWG & 28AWG) of the same length which I connect to a power supply to deliver power to my board.
My board will consume around 400mA maximum.
Which wire will have more IR drop ...
user220456
0
votes
1
answer
213
views
Popped a power supply fuse - What did I do wrong?
I recently purchased a 5V 40A power supply that looks similar to this:
It didn't come with a power cable, so I found one that I wasn't using and stripped the side opposite the three-pronged side (the ...
- 113
5
votes
4
answers
12k
views
Does the neutral wire have any voltage?
In this article, the author talks about 3 phase and the magic of a missing neutral wire. And there's the following paragraph:
In a 3-phase system the voltage between any two phases is 3 times ...
- 859
1
vote
2
answers
743
views
What is the purpose of cylinder "second power bricks" on cords? [duplicate]
I have noticed a large number of power cords that have a PSU built into them also have a second brick on them. What is the purpose of this "second power brick"?
Example, Xbox 360 Power Adapter:
I ...
- 115
0
votes
0
answers
49
views
Power problems related to copper wires and pigtails
I am using a battery to power a odroid which requires 5V/4A. The battery voltage when measured using a multimeter was around 26.7.
I had two setups:
I used a 1 sq mm copper current carrying wire to ...
- 123