Looking for ways to manage your delivery costs? You're not alone. Here are some of our most frequently asked questions. What are TDU Delivery Charges? The Transmission and Distribution Utility (TDU) that services your area charges each customer for the cost of maintaining electricity poles & wires, meters, etc. These charges are approved by the Public Utility Commission of Texas (PUCT) and are passed through to you without any markup. These charges apply to all business custo