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Electrical Question about a Power Supply Size

We’re not talking about a lot of amps, and since it won’t be plugged in all the time, is that safe?


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Electrical Question from Jon about a Power Supply Electrical Safety
Background: Jon, a Homeowner from I live in Everett in the state of Washington
[ad#block]Question: I have an AC adapter that says 5v @ 700mA.
Would it be safe to use it to charge a device that says 5.1v @ 750mA?

I know that the device would draw 750mA of electricity, and that’s over the 700mA of the adapter, but since 700 and 750 is close, and we’re not talking about a lot of amps, and since it won’t be plugged in all the time, is that safe?

Thank you.

Additional Comments: It’s a great site. Thank you so much for having a site and service like this.

Dave’s Reply:
Thanks for your electrical question Jon. I understand what your saying, but even if your 50mA over that will be enough to cause the power supply to over heat and the device to pull down the voltage because the initial power that it needs is not available which may lead to either unit burning out or blowing an internal component.

The Following links will assist you with your electrical question:

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The following may also be helpful for you:

Dave's Guide to Home Electrical Wiring:

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Here's How to Do It:
Wire It Right with the help of my Illustrated Wiring Book

Great for any Home Wiring Project.
  electrical wiring  

Complete Guide to Home Electrical Wiring

Perfect for Homeowners, Students,
Handyman, Handy Women, and Electricians
Includes:
Wiring GFCI Outlets
Wiring Home Electric Circuits
120 Volt and 240 Volt Outlet Circuits
Wiring Light Switches
Wiring 3-Wire and 4-Wire Electric Range
Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet
How to Troubleshoot and Repair Electrical Wiring
Wiring Methods for Upgrading Electrical Wiring
NEC Codes for Home Electrical Wiring
....and much more.


Learn more about Home Electrical Wiring
with my Online Video Course:
Basic Home Electrical Wiring by Example


Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right

The Safest Way to Test Electrical Devices and Identify Electric Wires!

The Non-Contact Electrical Tester
This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use.

The Quickest Way to Check for Faulty Electrical Wiring!

The Plug-In Outlet Tester
This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring.
It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use.

Strip Off Wire Insulation without Nicking and Damaging the Electric Wire!

The Wire Stripper and Wire Cutter
My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires.
This handy tool has multiple uses:
The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation.
The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets..

The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.


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