ask the electrician
Electrician Training Electrical Certification wiring recessed light fixtures Electrical Wiring Electrical Troubleshooting and Electrical Repairs wire outdoor light fixture Home Electrical Wiring Diagrams
wiring home generator and transfer switch wiring a 220 volt range cord outlet Wiring for GFCI Outlets Wiring Outlets and a Switched Outlet Wiring and Installing Ceiling Fans and Remote Controls wire dimmer switch wiring diagrams for switches wiring a dryer cord and 220 outlet circuit breaker panel
Electrical Wire and Cable

12 volt dc power supply


electrical power wiring By
Summary: Electrical Power Question: I have a tennis ball machine manufactured in 1998. It has a rechargeable 12V 12Ah battery but plugs into an a/c outlet to recharge.

Electrical Troubleshooting: 12 volt dc power supply


Home Electrical Wiring Tips

Helping You Wire it Right
Check out my YouTube Channel, and Subscribe!

Electrical Power Question:
I have a tennis ball machine manufactured in 1998.

It has a rechargeable 12V 12Ah battery but plugs into an a/c outlet to recharge. It has two 12V DC motors that run the ball-throwing-wheels.

I've been through a number of expensive batteries.

Is there a way to rewire this so that I can plug in and run it only on a/c?

When I unplug the battery, everything stops working.
Steven S.


Hi Steve - Great Question!
You may consider purchasing a 12 Volt DC Power Supply which is rated for the watts of the motors.

You should be able to disconnect the battery unit and connect the wires that used to go to the battery and connect them to the power supply.

For example, I found a Radio Shack 22-506 and saw this model as a possibility. The key is to make sure the power supply will handle the motor loads rated at above the total watts of all the motors.

Make sure the power supply is fuse protected. Try to find a power supply that is rated for outdoor use.

You should plug your power supply into a GFCI protected receptacle when in use outdoor. Understand that altering the original design of your unit will void the UL Listing and most likely the Warrantee.


Basic Home Electrical Wiring by Example

A Quick Overview of Home Electrical Wiring

Helping You Wire it Right


Electrical Wiring Tips for Home Electrical Wiring Projects

Tripping Circuit Breaker, Outlet at a Wall Switch, Light Fixture without a Ground Wire, Help with Home Electrical Wiring Projects.

See more House Wiring Videos from Ask The Electrician:

Home Electrical Wiring Videos


Learn more with my Home Electrical Video Course:

Basic Home Electrical Wiring by Example


» You Can Avoid Costly Mistakes! «

Here is 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, Handywomen, 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.