The single-line diagram (SLD) is an essential tool for the electrical professional that all too often gets overlooked at the end of the project. Budgets get spent on many things and it may be easy for someone, who doesn’t understand the importance of this document for electrical safety, to put off updating the single-line diagrams. This could be an opportunity for the electrical contractor to own and maintain this valuable resource. The challenge is conveying the value proposition to the right people to ensure the money is in the budget to fund the maintenance of this document. Let’s take time here to help build the safety case for supporting the single-line diagram.