Likewise,. If I need to run 25 I would say 16 AWG is good? Your description of polarity is a bit incorrect. Im wondering now how battery voltage would tie in: We have a white noise device that takes either 4 alkaline batteries in serial, which I know would be 6 volts, or can be plugged into the wall with a 5.5 volt AC adapter. We had a hurricane-related flood. 10A to watts calculation with voltage of 120V AC. How can I differentiate between Jupiter and Venus in the sky? I am in Australia and have 240v power supply. If its the + then its positive polarity and negative if its the -. We use this basic electric power equation: On top of the calculated amps, we have to apply the 80% National Electric Code (NEC) rule. The back and side of the radio clearly say, Power Source: 7.5V 400mA AC/DC Adapter Now Im using: INPUT: 100-240 1.7A 50-60HZ. Im still if sure if the polarity drawing on the adapter is what the adapter does or what the device its plugged into should do. Lucky there wasnt a full on fire and I was home to catch it before it got out of control. All wires are at least some feet long (10 ft, 20 ft, 30 ft, and so on). What you need to do is to recognize that your circuit needs more amps. This makes more sense than all the electronic matchmaking. One possible explanation for the rating might be that Subaru is being conservative that's not a bad stance for them to take since inverters are typically rated for the amount of power they can deliver, not the amount that they consume. Back before I knew alot about electronics, I plugged a 16V adapter into a device that needed around 7 volt. No, the laptop gets 19v, but then reduces the voltage to output to the battery. I know they are 4V because I though it was a rather strange voltage. Feature image by Qurren GFDL (http://www.gnu.org/copyleft/fdl.html) or CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/), via Wikimedia Commons. Will it power the laptop? Backblaze is the solution I use and recommend. In turn if one used a lamps cord, the wires would get hot as the heater is trying to suck more power through it than the wires inside the cord can provide. Dont use it. The voltage on the adapter was lower than on the output TV. The best answers are voted up and rise to the top, Not the answer you're looking for? Any suggestions for a simple workable solution or any issues to avoid ? I lost my PS2 Super-Slim power cable, and I want to play the PS2, but I have one for my PS3. Yeah. Lets face it. Of course, polarity would be a factor that youd still be taking a chance on, but many modern electronic devices have built-in polarity safeguards which are much less likely to fry because of reversed polarity than because of over-voltage. Hi Fred 18 AWG copper wire has a median ampacity of 14 amps (here is the full AWG copper wire ampacity chart). (Youve probably also heard about resistance (), but this doesnt usually show up on power adapters.). Sidenote: it may well be the TV itself is broken as there are many parts that go over time. Nobody really does it by hand. And yes, its just fine to keep it plugged in 247. (50ah 12v 85% 50% 100% 90%) 120 watt (229.5) 120 watt = 1.9 hours
Are cigarette lighters 12V? - Static And Constant Its the 5a 75w that has me thinking it needs not just the plug, but a fat box with the two cords hanging from it too, thoughts, suggestions pls, aa grateful disabled veteran, I got an AMH A399U monitor with a Korean plug and power AC 100-240V 5a 75w. The polarity should be noted on the adaptor label along with the Power output etc. If your appliance says input: DC 12v/1A, get an adapter that says Output: 12v/1A DC. Normally, you would hitch the trailer up behind your car. Bear in mind DC devices are polarity sensitive and be sure you know how to use a meter less you fry it. This has saved me multiple time. In my 2015 Subaru Forester, the 12V power outlet in the center console says that it is designed to supply loads that draw a max of 120W. Thanks. What does 60w 120v mean? Great job !!! I know it takes an AD-5 adapter. In theory, your device should be fine and not have overheated as it was under powered. on the right u see the same info for the compatible charger exc .. for the product u r trying to either power p or turn on .. and not in a list for like computer dvd layer hone exc but in the INPUT OUTPUT \compatabiity for. Hey, I plugged a AC 5.5v 2.5A power adapter into a DC 5V charged device, and now its not working, did I do something bad to it? Electrical power ratings are always nebulous. Haha yeah I forgot to mention I also had a box of Old Apple stuff. Between my wife and I, we have quite the graveyard of proprietary Apple pluggers. Unfortunately, it looks like theres only one real seller of the adapters, and I ordered one from ebay, but never received it, so I was wondering if I could make a universal adapter work for the phone, such as the Original Power Powerline 600 mA Universal AC Adapter found on the Walmart website (it says 3-12V DC at up to 600 mA)? can i just go by the in&outputs? @dlu: 20A at 14V is 280 watts, but 20A at 11V (the moment you switch your headlights on, for example) is only 220 watts, and if you've got a 250+ watt load on it, you very well might blow the fuse. My problem is a little different. I know that I have to observe the proper polarity, but I cant seem to find a transformer that is provide with just bare wires. I completely understand the output amps. Its AC in DC out, not AC OR DC. SO in a nutshell, Voltage and polarity must be the same. Hope this helps and that I didnt confuse the matter. I'd stick to the manufacturer's recommendation of a 120W steady load. I got a portable DVD player from Goodwill online and it didnt include an adaptor so I guess Ill have to buy one. Device no longer works does work on a duplicate power brick. Correct. You saved me from burning my house down! Anyone here that can help it would be greatly appreciated. or am I missing something? Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. Why does the present continuous form of "mimic" become "mimicking"? Get, easy to follow overview. GDPR: Can a city request deletion of all personal data that uses a certain domain for logins? air), Sensible Heat (BTU/hr) = 1.1 x CFM x t (std. And thats why I have a label maker. Which is the positive? Also, under the current too high section above, it explains that its OK if your power supply is rated for MORE current (amps) than the device needs; the device will only draw the current it actually needs. Using this calculation and consulting the AWG wire size chart you can adequately choose a 12V wire size for devices that are 0 feet away (this is a theoretical calculator, for practical use, you have to consult the 12V wire size amp ampacity chart you find further on). Same deal. Matt, I use the zoom on my smartphone (S4) camera to take a close-up picture of the label on hard to read adapters.. it makes reading them a whole lot easier!.. The safe way, you need to check your original phones charger plug and find the voltage V symbol. Input: 120V~60Hz :/. I have an LG Gram 17Z990-R.AAS8U1 17.3 1.5v x 8 = 12V, BUT on the side where the power adapter plugs in, it says: DC IN 9.5V, Why the difference? Hello John, alright, you need 7.5 amps. if using adaper 15V,0.5Am,7.5W instead of the original adapter 15V,0.36Am,5.4W is it wrong. CE; RoHS(a square icon w/check); FC (with a little c inside big C); 10 with counterclockwise arrowed circle around it; a filled in circle with check mark in it. That fuse in your plug is to protect your device from sudden surge of electricity. You havent indicated what the TV requirements are i.e. Hello Yogesh, the rating wire is connected with ampacity. In short, you need a 250 kcmil copper or 300 kcmil aluminum wires. Just wish I had always done this (guilty of still having a box of adapters that are unmarked). So then if I stick to the 120W load I have one followup question. However, the power supply that came with it says input: 100-240v AC with output of 12v. Choice of 3, 4.5, 6, 9 and 12 volts AC or DC. Great article. Can stock headlight wiring deal with 110 W bulbs? This is a weather station that is made of wood that is illuminated with LEDs that actually shine through the wood laminate. Or, look for a diagram showing the polarity. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. I accidentally-on-purpose used a 5V 2A adapter with a 12V 1A device and the device conked out on me. Kind of feel that I am, hence the question. I have a 12v 0.5amp transformer that has open circuit voltage on 19v. It is model F4U041 and the coding is something like this: I have a meter so I tested your theories and this is what I found. 11.5 vs 12 is .5 v difference. Furthermore, on the fuse box, it says on a label on it: INPUT 100 -240V ~ 1.5A, and the PS3 power cable says 250V 2.5A. My input states 100-240v 1.2A does this mean I should be using a 1A fuse in my plugsocket? (I have a 12V adapter I could use, but I dont have a 9.5V adapter.). That is why the PS2 power supply says 100- 240V because it can turn AC power between those voltages into the power appropriate for the PS2. Many thanks, This may have been the closest I have been able to find anything about power supplies. Thats just the 101 of how current works and we have NEC code to prevent this. I used a 12V~1A power adapter on a device that requires 12V~3A. Furthermore, USB devices are smart enough to shut things down if something isnt right. The article mentions, If you multiply the voltage by the current, you get the wattage. Thank you for writing this! What is the significance of that, if any? The 120 volts is the pressure pushing the electricity through the resistance of the heating filiment of your light bulb. Low Superheat Normal Subcooling: 3 Causes + How To Fix AC? Here's OpenAI's ChatGPT allows you to generate content quickly. Reread the article and try to follow the examples, check other websites as well if you really want to understand this it just takes time and maybe even somebody in person to show you if you happen to know somebody that is good with this stuff in your neighborhood or your family. does that mean i should look for a plug that is 12dc with .1amp. 80w vs 80.4W is 0.4W difference. Also, charging voltages are greater than rating voltage. In this case, we will need a 18 AWG wire size because it has a 14A ampacity. Thank you for this article, and for all the comments! watts = amps volts. To help you out with this calculator, we have created a calculator that does all of this automatically (including accounting for the 80% NEC rule): Here you simply input the max. Hence, the oft-encountered Charging is not supported with this accessory message. Can you help? is that saying that the device internally will adjust the polarity to whatever it needs? Thanks to all the xperts that very concisely explain Amp draw from devices that should be less than the Max Amp stated on Power Adapter label. Its the first thing I do when I buy a new gadget. They don;t cost a lot on Ebay. A (of P.S.) That it must have come with a faulty adapter? 12v is the safer, lower voltage obtained from 120v using a step-down transformer. If im using it in Australia with a 240V to 110V step down transformer rated at 50W Max output power and 0.45A max current, will this cause any issues. OUTPUT:19V. Now, how do you figure out what size wire you need for a 12V circuit? As you noted that you have had several replacement adaptors and also different units and all have the same issue, it may well be spikes and fluctuations in power at the socket that is causing the issue and blowing out the adaptors. Further on, if the battery is located some distance from the device (say 20 feet, 50 feet, or even 80 feet away), we need to account for voltage drop (big impact). Since fuses are designed so that they will tolerate a small overload for a long time (hours or even days at around 5% or 10%) and to blow more and more quickly as the overload increases, the other components in the circuit should also have been selected with that in mind. No music came outjust a hum. Help!
Understanding LED Drivers by LEDSupply Now if I can find a plug that will work in the EU that has the same output would it then work without me burning down my house? :-) ). It seems that your device is under voltage with the new adapter but enough to make it run. 12V Cable Size Calculator (At 0 Feet Distance), Accounting For Voltage Drop (12V Wire Sizes Used In Practice), Thermostat Not Reaching Set Temperature: 7 Causes + Fixes, Wire Gauge Wattage Charts For AWG Wires (4/0 AWG To 14 AWG), How Many Outlets On A 15 Amp, 20 Amp, 30 Amp Circuit? Its important because too little power means your device wont charge or operate correctly. An example of this would be the current inrush that happens when a computer power supply is plugged in. Gday!! Im late to the party here, but I just want to say thank you for the fantastic article. Another AT&T dealer (surprising) replaced it. At 12V, the max. Plus then becomes minus, and vice versa. How to convert electric current of 10 amps (A) to electric power in For example, a 10 amp-fused 12-volt lighter socket will safely power about 1 amp of 120 -volt AC (or about 120 watts).
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