Junction box costs range from low‑price indoor models ($10‑$60) to weatherproof units ($70‑$450), with installation averaging $100‑$300 depending on location and materials. The distribution box cost encompasses not only the initial purchase. IP68 high performance diecast aluminium box which withstands immersion in water up to 1m for 24 hours. The top cover is designed with heat sink for efficient heat dissipation. Available in large volumes for bulk purchases. PREMIUM CONSTRUCTION POWER DISTRIBUTION BOX: Crafted by WESTERN, the 6506TLSX Temp power box features a durable blend material for long-lasting performance in demanding environments. Shop. When you start looking for a distribution box, you'll quickly realize the price range is wider than a highway. You might find a small plastic unit for the price of a fancy dinner, or an industrial-grade stainless steel beast that costs as much as a compact car. The “how much” depends entirely on. Same Budget, New Fresh Look! Issues? Contact Us You save $43.