What type of extension cord should I use with my Shredder Joe SDJ616? Your Shredder Joe SDJ616 is rated at 13 amps, and is best used with a 50-foot, 14-gauge, 3-prong outdoor power cable. We highly recommend using our Power Joe PJEXT50-B Extension Cord, which is specifically designed for use with our products and is available for purchase on our website. Related articles What is the reduction ratio of the mulch produced by my Shredder Joe SDJ616? Does my Shredder Joe SDJ616 have an adjustable stand? What extension cord can I use? New Charger will only have two Prongs (24VCHRG-QC) Does the 24V-1500FL-LTE-P1 unit come with a battery and charger?