Assessment & Diagnosis: the full procedure

Systematically evaluate the issue and document findings so the customer gets an accurate scope and price.

• Applies to: Licensed electrician or supervised apprentice performing diagnosis.
• Frequency: Every service or repair job before quoting.
• Scope: Standardizes how findings are gathered and recorded for quoting. The technical method of diagnosis and any decision to de-energize defers to a licensed electrician, the NEC/local code, and the safety plan.

What you need

• Multimeter/voltage tester
• Circuit tracer
• Work order/findings form
• Camera
• Manufacturer/spec references

The procedure, step by step

1. Confirm the symptom — Reproduce or observe the reported problem so the diagnosis targets the real issue.
2. Follow the verify-dead workflow first — Before any hands-on testing of conductors, follow the de-energize/verify-dead SOP and safety plan. Treat everything as live until a qualified person verifies otherwise.
3. Inspect systematically — Work from symptom toward source — device, circuit, panel — documenting each finding instead of jumping to conclusions.
4. Record measurements and findings — Note readings, affected circuits, and root cause in the findings form. Photograph anything the customer should see.
5. Identify scope and options — Define the minimum repair plus any recommended related work, separating must-do from advisory.
6. Flag code/permit triggers — If the work may require a permit or inspection, note it for the permit-coordination SOP — do not decide code applicability informally.
7. Summarize for the customer — Translate findings into plain language: what's wrong, what you recommend, and that a written price follows.

Quality check before you finish

• Symptom confirmed, not assumed
• Verify-dead workflow followed before hands-on testing
• Findings and readings documented
• Root cause identified, not just symptom
• Must-do vs. advisory work separated
• Possible permit/inspection triggers flagged for coordination

This is a free, source-anchored standard operating procedure (SOP) you can print and hand to staff. It documents the work sequence for a Electrical business — not safety or regulatory rulings, which defer to the cited authorities, the applicable code, and your own health-and-safety plan. Open the tool above to print it, toggle ink-saver, or (with a free ToolFluency Business account) edit it to match your own workflow.

Sources

• NFPA / National Electrical Code (nfpa.org)
• OSHA (Occupational Safety and Health Administration) (osha.gov)
• IAEI (International Association of Electrical Inspectors) (iaei.org)