Lay all the cables in the trench with the water piping from the well. I'm assuming it is stainless steel, so I'm wondering should I drill into it, or just strap something to it to mount the box on. The pump is 300' down in a 400' well. Anyone ever done that before? You can get boxes. By the end of this article, you'll have a clear grasp of how to identify and fix common problems associated with your well pump control box. Turn off power and ensure safety Prior to starting any electrical work, ensure the power to the well. On day 1, I decided that the electric line was faulty. External mounting feet included. Periodically inspect the product.