Board Thread:Questions and Answers/@comment-98.221.157.9-20130428194039/@comment-10703376-20130613235132

Redstone Energy conduits actually stop providing MJ if it is not needed. Another solution, especially if you want the quarry wireless, is to use an Energy Tesseract. As long as you supply the input tesseract with MJ, the quarry will not explode. Tesseracts are superior because they can be placed next to the quarry block, and you won't have to continue moving  your power source. I even believe that the input Tesseract can be placed so that it is touching the BC Producer, meaning Redstone Energy Conduits may not be requiredd for the quarry.