These four parts are essential for installing an electrical circuit to the outdoor unit of a mini split system. All products are UL listed and intended for outdoor use. The electrical whip (728156) is an all-in-one product that runs from the outdoor unit to the electrical disconnect box. The electrical disconnect box (728162) provides a way to cut power to the outdoor unit for servicing (required by code). The electrical conduit or Liquid Tite (728160) is flexible and is used to run wire along the outside of a building from the electrical panel to the disconnect box. The connector fittings (728160) are used to connect the conduit to the disconnect box.