Questions tagged [amperage]

Amperage is the disfavored term for "current:": the strength of an electric current in Amperes (Sometimes shortened to Amps).

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31 views

Can I wire 240v for a table saw off a 240v breaker for a dryer? [migrated]

I need to wire a 240v outlet in my garage for a table saw, there’s only one open space on our box so I was wanting to use an existing 240v breaker, (I guess another question is are double pole ...
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6answers
208 views

How to find what is eating up current in electronic circuit?

I have 2 exact electronic circuits, with one malfunctioning while the other is functioning. The total current consumed by the malfunctioning circuit is 0.48 A, while the functioning PCB has 0.271 A. ...
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5answers
143 views

Can I use 10A multimeter to test 445 watts solar panel

I want to know if I can use a cheap multimeter, model DT-830D, which has a maximum current rating of 10A to test voltage and amperage of a 445 watt solar panel with the following characteristics: <...
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0answers
89 views

LED dimming - eliminate EMI

Looking for some advice. I have a subsea light that operates at about 10-14v, but accepts up to 32vdc input(0-1.7A). My power supply is 24vdc 10A. Cable length 100 meter +. At max the lights draw 11 ...
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1answer
93 views

Does a voltage limit in a battery increase amperage over all? [closed]

I have an 18 V battery with a 4 Ah battery. If I limit the voltage output to 9 V with a buck converter or voltage regulator, how would limiting the voltage affect the amount of current output?
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2answers
95 views

What happens when you try to draw more amps than is available?

2 hypothetical situations: Situation 1: A 5-20R wall outlet is extended using an extension cord. The extension cord has a 5-20P plug, but only has a 5-15R outlet. Situation 2: A 5-15R wall outlet is ...
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0answers
47 views

What amperage should a 5 volt power pack be to safely use with a random 5v device to avoid the risk of burning out the device (i.e. an apple tablet) [duplicate]

I have a number of variable power packs one of which supplies the 5volts I need to for a particular device. The output is "500mA MAX". I worry that as happened once before with an ipad I ...
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1answer
51 views

Need help with potentiometer for DIY magnetic stirrer

I am looking to make a DIY magnetic stirrer for cleaning 3D printed resin models. In principle, the setup is not very complex; a motor, potentiometer, power supply. The problem is I am a novice when ...
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3answers
118 views

80% amperage rule for continuous loads?

I'm trying to understand how an electrical load affects a circuit. Let's say, for example, I have a setup that is on a 120 V, 15 A circuit: 120 V x 15 A = 1,800 W max if we have a continuous load (3+ ...
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1answer
61 views

5 V radio on 12 V battery [duplicate]

I am working on a powerbox project (12 V): charging a cell phone, lights, banana plugs and a small radio. 12 V is somewhat straightforward for me. The radio (https://rb.gy/e6ngmo) works with 3 V to 5 ...
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1answer
117 views

Safe Continuous Discharge Rate of a Car Battery

I have a car battery (Varta Silver Line of Products) that's rated at 110Ah, and 900A Cold Cranking Amps. The marketing of the battery from different sources says "huge reserve capacity" but ...
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9answers
236 views

Why is power specified in watts rather than amperes?

This probably has an obvious answer I'm missing, but searching the web only gave me information on how watts are defined, not why we use them. Many electric appliances (from things used to build ...
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1answer
58 views

How to increase the fan speed connected to a usb port

I have 6 PC fans 12V 0.12A connected in parallel. They are connected with a usb cable to a mobile charger. When I was connecting them to the motherboard they were much faster than now though the ...
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4answers
137 views

Why AM I getting 30 VAC @ 52 A?

Why am I getting 30 VAC @ 52 A? I have three identical transformers with a secondary, 20/10 VAC (8.8/17.6 A). I connected them is series to get 30 VAC across a heating band with a very low resistance (...
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1answer
47 views

Current draw of a bilge motor [closed]

What happens at the coil when an electric bilge motor is stuck and stopped from spinning and the current draw increases beyond the rating (from 2 A to 8 A)?
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1answer
80 views

Resistance and energy cost in an AC circuit

I’m learning on my own about EE concepts. According to Ohm's law if voltage is constant then current and resistance will affect each other primarily. I believe most household AC circuits provide ...
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1answer
53 views

Will upgrading my home electricity from 60A (120V) to 60A(240V) double my maximum available wattage? [closed]

My home appliances when turned on simultaneously runs at 3000 watt plus I am planning to move my gadgets from my office to my home (combination of multiple servers, multiple mac pcs and other gadget ) ...
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4answers
102 views

Battery - high capacity but low power

I recently saw an advertisement for a battery with 50,000mAh storage capacity, with an output of 5V and 10W power. Is this even possible? Shouldn't it be 250W power, or did I misunderstand things? I ...
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2answers
87 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'...
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1answer
37 views

Energy consumption Calculation

I work for a food processing plant and working on a project that calculates energy consumption. Am having a hard time converting information given by the manufacture to calculate the average kWh. ...
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1answer
125 views

Photonicinduction - Less Turn Equals "Same Amps" but "Less Voltage"

I was recently watching a video by the youtuber ‘Photonicinduction’ and I came across this video. When the video was at 1:50, I noticed that there were 4 Turns on the primary and secondary so its a 1:...
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5answers
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Getting the energy consumption in joules over a period when having current and voltage

I'm trying to calculate the energy consumption over a period of 1.3 seconds in joules (J). I have a sample every 100 ms (0.1 second) with the current and voltage (in volts) (in practice, the samples ...
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1answer
34 views

SolarPanel Calcuation For Laptop

I am having some trouble understanding if I am doing my calculations correctly when trying to calculate the battery size / solar panel wattage for our RV. I started off small by just calculating for ...
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1answer
52 views

What happens when an electrical load is supplied to a motor via a switch and the motor doesn't turn?

I'm not from an electrical engineering background. But I'd like to understand what happens when I have the following: Electrical 'main power' switch ------> 'small switch' ------> electrical ...
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2answers
121 views

Why do battery makers advertise voltage?

I understand that voltage is an important factor for determining the amps of a battery. So why do battery makers advertise both the volts and amps of a battery? As a consumer, if I know the amps, why ...
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4answers
549 views

If voltage and current are inverse to each other, how do we get higher power?

I am dazzled; I'm young (teen) so am not too good, but I am wondering if current is proportional to voltage, how do we get high power? What I'm trying to say is that if we were to have a 5 V supply, ...
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4answers
222 views

Why would a multimeter give an unexpected current reading?

I assume that the multimeter should read 2A for a 2A power supply, why is it only 0.358A? Edit: After watching a video on the basics of using a multimeter, I realised that as well as short circuiting ...
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4answers
998 views

How many amperes can an alkaline AA battery supply?

I've seen a Duracell alkaline AA battery on Amazon. It can supply 1.5 V, but I don't see any information about the current (in A) or the power (in W). Where can I find this information?
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Why are high power LEDs categorized by wattage, not voltage & amperage?

In searching for the correct replacement LED for a project, I've noticed that, more often than not, high power LEDs seem to be primarily categorized by their wattage. Why is this the standard? It ...
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1answer
50 views

What fuses do I need?

I was trying to post a photo but it doesn't seem to like it I am repairing an electric fireplace, the fuse seems to be blown. It is a classic glass fuse with a long strand down the center. It says 25A ...
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65 views

Does my attached drawing accurately depict amperage measurement

I want to measure the amperage in my system without destroying anything. Is my drawing an accurate representation of where the probes should be placed?
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1answer
47 views

Different output for recliner power supply safe to use 25V 2.5A to a 29V 2A [duplicate]

My father broke his power supply for his recliner. He's on oxygen 24/7 and I was trying to find out if it was safe to use a slightly different power supply cause I can't find an exact match. The one ...
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1answer
59 views

PC Power Supply Amperage

I have a 450 watt power supply that I am trying to use as a DC power supply to learn about electronics. I watched some videos that show grouping the red, yellow, black wires so I did that but when I ...
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1answer
246 views

Clamp meter readings

I have a Uni-t UT210e clamp meter. I noticed that when measuring AC current, the reading varies if I move the wire inside the clamp. The measured value displayed on the meter is higher when the wire ...
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2answers
36 views

how amperage of the source influences the components of a circuit? [duplicate]

I am trying to understand when some devices say that for example it needs 5V and 2a to work properly, or when a USB charger says it provides 5V at 1A or another that says 5V at 2A. Why does all this ...
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3answers
530 views

Want to make a Chia farm of 156 external hard drives [closed]

I have two questions: How do I not burn down my house Is there any way I can use less electrical outlets by getting AC/DC splitters? Question 1: So basically I got 156 external hard drives. The AC ...
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1answer
46 views

How to correctly wire LEDs and minifans into my greenhouse cabinet [closed]

I am building a small 4-shelf vertical indoor greenhouse. Each shelf has a 3-port USB hub-splitter which powers 1 USB minifan (5V, 1A) and 2 strips of 50cm USB LED lights (5V, 1.8A (30 * 0.06)). Then ...
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2answers
113 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 ...
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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 ...
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6answers
522 views

Why does putting the leads of an ammeter in a receptacle short the outlet?

An ammeter needs to be connected in series with a circuit to test current, which sticking the leads in an outlet does not do? Also, there is no amperage to measure on an outlet with nothing plugged ...
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2answers
67 views

Is running 4 18650 batteries in parallel too much current for a small RC circuit with the same voltage?

I built this small RC deadbolt lock and everything works great, however, I need to fix the issue of battery life before it is finished. Originally the circuit had a 3.7V, 800 mAh battery. I would like ...
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0answers
60 views

Can anyone help me identify this transformer?

I'm trying to make a project using used part from a radio with my basic electronics knowledge. I want to convert this AC 9.7V to a steady DC 3V using a diode bridge so I need to know what I'm working ...
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1answer
101 views

It okay to use 12V 2.5A adapter instead of 12V 1A? [duplicate]

I have a piano keyboard that uses 12V 1A adapter . The adapter was not working anymore so i used another one which was 12V 2.5A but after 45 minutes of usage the keyboard got little heated up in the ...
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2answers
54 views

Circuit amps vs device amps [duplicate]

I've always struggled with some really basic questions around amperage. Like, if you're plugging a 2 amp device into a wall socket, but that circuit is a 20 amp circuits why doesn't it blow up? Then I ...
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499 views

Is it wattage that kills you and not specifically amps

First of all the actual amounts needed to kill and the body resistance is not important for this scenario. Let's say we are working with dc. Let's say that 100ma is enough to kill across the chest ...
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1answer
53 views

Amps and AmpHr? [duplicate]

What's the difference between 7Amps and 7AH, can someone give a simple explanation? Every answer I find is not helping me, for a beginner how do you explain this?
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1answer
65 views

Calculate the electrical current density (international metric systeml )

I have a doubt about a result on a result. I have to calculate the electrical current density like $$\frac{\,\text{A}}{\,\text{m}^2}$$ I have the following parameters: $$r=1\,\text{mm} =10^{-3}\,\text{...
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2answers
90 views

monitoring voltage and amperage on Raspberry Pi USB ports

Question: Is there a way to get the Pi to tell me the instantaneous voltage and amperage on the USB port that I could write to a data file? Why I am trying to do this: I am trying to monitor rapidly ...
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2answers
172 views

Bench Power Supply for ESC and KV on motor

I have a bench power supply it can provide ~10 amps and ~30 volts. Working on an autonomous car project I have an ESC to manage a brush-less motor. Two questions I cannot seem to wrap my head around: ...
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2answers
150 views

12VDC Fan rated at 0.08A only drawing 0.04A, can I increase current draw in order to bring the rpm up?

I've built a small desktop fume extractor for soldering. It uses a 120mm 1000RPM, 12V, 0.08A case fan. Not huge, but it does the job. The fan is only drawing roughly 0.04A and I have been fault ...

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