# Questions tagged [gauge]

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### How can I find the diameter of a wire if I have the length and resistance? I cannot use measuring tool because wire is thinner than 0.1 mm

As the title suggests; I am trying to calculate the diameter of a wire given its length and resistance. Specifications: Length: 30.4 cm Resistance: 17 Ω
87 views

### 12V – DC wire gauge | Does length calculation ‘reset’ at socket/ junction?

Sorry in advance that this is a basic question which is pretty obvious. I’ve just been struggling to find a clear answer and wanted to confirm. I’ve set up a 12 V leisure battery system in my van to ...
88 views

### Adding a gauge affects the transistor switch circuit

Thanks to the help of this community I was able to build the following transistor switch circuit (details here, big thanks to @mathkeepsmebusy): The circuit works and the LED illuminates based on the ...
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95 views

### Super tweeter: voice coil wire gauge x power rating apparent inconsistency?

I'm an amateur electronics experimenter/enthusiast. I have an 8-ohm super tweeter from JBL (sold in Brazil as model ST200) whose RMS power with passive crossover is 100W @ 8kHz. It's quite a large ...
85 views

### Electric guitar with active electronics and a DIY battery gauge

There is a primitive DIY battery charge monitor which blinks a LED after input voltage drops lower a certain level. Let's call it battery gauge. Also, there is an electric guitar with active ...
1 vote
138 views

### How to convert from one header pin diameter to another?

I've unfortunately/accidentally purchased some 2.54 mm-pitch headers with pin-diameter 0.5 mm -- significantly thinner than the common DuPont cables with pin-diameter 0.64 mm. (When ordering them, I ...
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470 views

### How to calculate the wire gauge windings when creating my-own PM BLDC Motor, 12N14P, Outrunner motor?

I am using BLDC Stator and BLDC controller at 48V @ 27A.
106 views

### How can I make an RPM counter for a diesel motor with an Arduino?

I'm new to Arduinos and would like to make an RPM meter or if possible a RPM wave converter. I get an RPM signal from the engine via pin 9 from OBD connector, but the signal is quite dirty and a ...
906 views

### What wire rating do I need for a WS2812b LED strip?

I am looking to make my first Arduino project. I use 140 LEDs of a WS2812B strip. I've got a 5 V, 15 A power supply plugged into a breadboard that goes to my Arduino and my LED strip. I have a roll of ...
1 vote
69 views

### Is a small proportion of higher gauge cable detrimental?

I have a monitor that takes 19.5 V, but I have been unable to find a barrel connector that matches the original with its 14 AWG cable. The closest I could find was an 18 AWG cable with matching barrel ...
1 vote
243 views

### Wire gauge sizing & current values [duplicate]

While working on selections of wire, I was introduced to the "current rating" of wires. Is this current rating dependent on voltage as well? Example: A 10 AWG wire is rated to handle up to ...
1 vote
80 views

### How to distinguish different temperature wire insulations?

Wire insulations have different temperature ratings: 80°C 90°C 105°C 125°C 200°C These ratings can result in different current ratings for the same wire gauge. Are there ways to distinguish ...
• 749
514 views

### Why does Pomona banana jack cable have 18 AWG but can handle 15 amps?

This is one of those very common jumper cables with banana plugs. It says 18 AWG in the datasheet (link below), but it can handle up to 15 A? One of the labmates told me it could handle up to 20 A?! ...
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218 views

### AWG and metric markings on wire differ notably

I have been looking at "Tri-rated wire". This is wire that ostensibly meets the British BS6231 Type CK, US UL 758 Style 1015, and Canadian CSA 22.2. I have noticed that the metric wire size (...
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2k views

### Negative DC wire gauge

I would like to mount some external flood-lights on a motorhome with a 12V DC system. I may need to install new positive wires to make sure they are sufficiently thick. I wonder if I also need to ...
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483 views

### What wire size to be used for Peltier cooling

I'm making a project with three Peltier in parallel (12V & 6A) each (TEC 12706) for cooling. I would just like to know the wire size to be used in (AWG or mm2), for running project smoothly.
1 vote
219 views

### How to convert hydraulic pressure gauge into analog output?

Below is the pressure gauge of the heavy equipment. The pressure gauge needle is moved by a hydraulic pressure line. We are looking to capture the hydraulic pressure into an IoT device that takes an ...
888 views

### Restoring and operating a temperature gauge from the Soviet space shuttle Buran

After the Soviet Buran (БУРАН) program was suspended in the late 1980s, the Buran space shuttle was housed in a hangar at Baikonur. That hanger unfortunately collapsed due to structural failure in ...
• 10.8k
125 views

### Can a lower gauge jumper be connected to a high amperage circuit as long as it is going to an appropriate sized breaker?

The 14 AWG wire is connected to an appropriate sized circuit breaker to prevent that run of wire from drawing too many amps; however, my concerns would be that the 2/0 cable being in such close ...
• 53
74 views

### What is the meaning of numbers at bottom of electrical gauges? [duplicate]

I work in a power generation plant and I noticed that all the gauges have some kind of standard description at the bottom. Some of them are easy to understand (I strongly suspect "~" means ...
• 305
842 views

### Determining wire gauge/AWG for DC

I have 15 kW electrical motor that will be connected to a 50 V battery. I'm trying to determine the wire gauge/AWG. Looking at AWG created confusion from as every chart has different recommendation. I ...
61 views

### Segmented Wire Gauge and DC Current Capacity

I am working on a project that brings power from a car battery inside the vehicle and to a DC-DC charger. The DC-DC charger then takes the power and charges a second battery. The system is rated at ...
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1 vote
686 views

### DC current rating of copper wire (SWG)

I want to use SWG-sized copper wire but I am a little bit confused about the following: On the internet I found different charts with different maximum current ratings for the same wire diameter. The ...
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### Wire gauge to connect to chassis in van

I'm building an AC electrical system for my van conversion and I'd like to know if there's a minimum wire gauge I should use to connect my negative bus bar to my van's chassis. Specs: I'm running a ...
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2k views

### What would be suitable wiring for a 52V DC 30A 1000W e-bike?

So I bought a 12AWG RW90 wire from homedepot and I think it caused my anderson pp45 connector to blow. I'm looking at the wiring for my motor and battery, and they both look like 12 gauge wires. And I'...
• 1
208 views

### Need tips on creating a custom usb cable

In short, I have two questions: Does shielding matter for a USB2.0 cable inside a computer? The length is about 50 cm. Is the requirement that data wires should be thicker than data ones still valid ...
• 11
334 views

### Gauging Wire for 12V Parallel Circuit

I'm building a 12V parallel circuit to run some LEDs...I simplified it in the picture below but need some advice on wire sizing in a parallel circuit. The combined amps of the 3 lights is ~11.25amps. ...
688 views

### Can I double 16 gauge wire? [closed]

I have seen several similar questions on the internet but I can't find a straight answer. I have a ton of used single strand 16 gauge wire that I would like to use. I know that 16 gauge wire typically ...
668 views

### Tachometer air core meter - how does it operate?

This is a question from a total noob, out of pure curiosity. I've been tinkering with my bike's instrument panel and took it apart - I found out that this sin-cos marking is the base of the air core ...
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1 vote
70 views

### How are analog thermocouple meters calibrated?

In most modern thermocouple measuring equipment, the input is high impedance and approximates a perfect voltmeter. This makes the thermocouple measurement easy because there is no current flowing ...
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470 views

### Tap into 12AWG wire with 20AWG wire

I am using 3 of these Mighty Max 12V 12Ah batteries on my Razor MX650 electric bike and they are connected with 12 gauge wire. I would like to tap into the power on one of the batteries with a 20 ...
• 115
648 views

### Will I run into a problem if I use an 18AWG extension cable for 240V device?

I currently have a length of SOOW 18AWG with ground connected to my breaker box. One lead is connected to phase 1 on a 15A breaker. One lead is connected to phase 2 on a 15A breaker. ...3 is ground/...
3k views

### How to calculate maximum input power on a speaker?

I got into this rabbit hole while trying to replace the speaker wire in my setup. I have speakers with 8 Ω of resistance (Rspeaker) and a maximum input power of 140 Watts, so I wanted wires that would ...
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178 views

### Programming stepper motors to smoothly show value that is refreshed at certain intervals

I am making analog speedo and rpm gauge for both a bike and a car using x27.168 stepper motors and AX1201728SG motor driver. I have encountered quite a problem with showing data that is not constantly ...
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4k views

### Can I use Dupont wires for power delivery?

For a small hobby project I'm trying to control an LED strip from a phone. To prototype this, I will simply use a breadboard. I have an external 12V power supply and the strip will use at most, 1.5 ...
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161 views

### Ceiling lamp, 14 gauge, not 18 gauge

I've Googled this very hard, and I'm not coming up with any good answers. This question seems very simple: Are there ceiling lights/lamps in the market that have a 14-gauge wire for the black/white/...
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3k views

### Can I use 18AWG wire instead of 22AWG when doing guitar pedal modifications?

I'm planning on doing some modifications to my Dunlop GCB95 Cry Baby wah pedal. As far as I can tell, the hookup wire in the pedal is 22AWG (it's difficult to read what's printed on the side). The ...
• 123
2k views

### How many amps between batteries that are wired in parallel?

How many amps will flow through the cables between my batteries if I have 2 batteries wired in parallel? Let's look at a simple example: We've got 2 batteries in parallel, and one 12v lamp that ...
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1k views

### What type of wire should i use to make a jumper on the PCB control board from my dryer? [closed]

Sorry for my ignorance on this topic. The relay (part G8P-1A4P 12VDC by Omron) on the PCB control board of my clothes dryer went bad. As a result, one of the pins and circle around the pin (sorry dont ...
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1 vote
1k views

### UPS output max cable length [closed]

I want to add 2x UPS PowerWalker VI 2200 UPS 1200W in the next room. Is it safe to add 2 Power Strip of 6M ? What Cord Gauge do I need ? UPS page https://powerwalker.com/?page=product&item=...
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1k views

### Split output of one temperature sensor to two independent signals using an op amp buffer [duplicate]

First off I am a car guy, if I have a schematic or details I can solder what I need. I have a client that fitted a digital temperature gauge to his car, he also wants to have the gauge on the ...
553 views

### Copper wire current ratings [duplicate]

I have seen a wide variety of different estimates for the maximum current rating for copper wire. For example, for 24-gauge copper wire, the Wikipedia article about "American wire gauge" claims that ...
1 vote
1k views

### On a wire designated as '3x14AWG' what does the '3x' part mean?

On a wire designated as '3x14AWG' what does the '3x' part mean? It is on a wire that is part of a surge protector power strip.
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1 vote
666 views

### Is it bad practice to connect wires of vastly different gauges?

I would like to connect an Anderson plug with 25mm² cable to a 12V AGM battery so that I can easily connect and disconnect different devices which will conduct currents of varying amperage. I may ...
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### Unstable wheatstone bridge simulator circuit - help required [closed]

simulate this circuit – Schematic created using CircuitLab I am looking to implement a wheatstone bridge circuit so I can accurately adjust the signal into a strain gauge amplifier circuit. Is ...
427 views

### Mixing wire gauge questions

I am putting a 50W 3.4A max 12V solar panel on my camper van. I want the option of removing it from my roof racks & mounting it remotely (so I can park in shade, but still have the panel in the ...
1 vote
150 views

### DIY water tank gauge using analogue ammeter - linearity

A follow up question to my previous on building a DIY water gauge DIY water tank gauge using analogue ammeter. I have scrabbled together a "Euro type" sender (10 Ω empty - 180 Ω full) and ...
185 views

### DIY water tank gauge using analogue ammeter

Our (old) boat has a fresh water tank whose level was reported by a now broken gauge. For cosmetic reasons I need to replace the broken gauge with a similar form factor (I do not wish to cut the panel ...
5k views

### What nichrome wire voltage/amps is required to heat 1 meter [closed]

How can I work out what voltage and amps are required to heat nichrome to: Temperature: 220 F Length: 100 cm Gauge: 20 (0.85 mm diameter, 1.62 ohms per meter) I think I need 7 volts and 3 amps. I ...
406 views

### Is this cheap extension cord safely rated for 1625W?

Comparing two cables that I have, a cheap extension cord and an expensive "heavy duty" extension cord, both are rated for the same load. Is this an inflated rating or is it accurate for the white ...
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