Want to test your electric fence to see if it is working properly? With RAMM’s electric horse fence testers, you will be able to access your fence’s voltage and current output readings. It’s always good to be prepared and to have the knowledge of how well your electrical fence is working, rather than to be unaware of an electrical problem. RAMM TIP – To determine what charger to use for your electric fence: length width square footage. The square ft. divided by 43,560 = the number of acres. Acre listings are given for each charger. If you have installation or planning questions, we encourage you to call us at 1-800-434-6296 to speak with a friendly RAMM account manager. You may also visit our Horse Fence FAQs page for the most common questions we have regarding horse fence installations.