Diagnostic Visit to Match Panel Intervention Level

As an electrical contractor estimating a job, which of the following scenarios indicates that a full service upgrade is strictly required?

A homeowner with 100 A service wants to add an EV charger that will push their total electrical load well beyond 100 A. Installing a sub-panel — without upgrading the main service — would be sufficient to handle the increased load.

As an electrical estimator, evaluate the following customer scenarios and match them to the correct service-level intervention.

A homeowner with an older electrical system requests the installation of a high-draw EV charger. As the contractor, arrange the analytical steps you must follow to justify and plan a full service upgrade.

After auditing a residential property with a 100 A system, you reject the customer's request to simply add a sub-panel for their new EV charger and workshop circuit. You justify your decision by explaining that their existing amperage is fundamentally undersized for the total connected load, and therefore, safety and compliance mandate a full ____.

You are building a standardized scope-of-work template that your office will use every time a residential customer's existing amperage is too low for their planned electrical loads. The template must list every major work item so nothing is missed on the permit application or the customer proposal. Which set of line items should your template include to fully cover a service upgrade triggered by undersized amperage?