Wastewater Lift Station: 372 Issues Flagged
Reconcile available fault current, equipment ratings, and motor voltages across electrical diagrams before equipment release.
Enterprise & volume pricing
Anonymized review · Published 2026-09-16
What this review documents
Reconcile available fault current, equipment ratings, and motor voltages across electrical diagrams before equipment release.
The documented result is a set of review findings. This case study does not establish that corrections were completed or that savings were realized. The examples below were marked useful in the source review record; they have been paraphrased to remove identifying details.
Key findings
Service interrupting rating is below listed fault current
Electrical
A meter/main is labeled 10 kAIC while the listed available fault current is 22,506 amperes.
Next step: Have the electrical engineer verify the fault-current study and applicable equipment or system rating.
Pump supply voltage changes between diagrams
Electrical
The one-line describes a 120/208-volt switchboard and 240-volt pump loads, while the drive control diagram shows a 480-volt supply from that switchboard.
Next step: Reconcile the utility supply, switchboard, drives, and motor utilization voltage.
Main switchboard rating needs reconciliation
Electrical
A second equipment callout lists 22 kAIC against the same 22,506-ampere available fault current.
Next step: Check the complete protective arrangement and revise the rating or fault-current value as appropriate.
Issue categories
Review details and suggested questions
Service interrupting rating is below listed fault currentElectricalCritical
Summary: A meter/main is labeled 10 kAIC while the listed available fault current is 22,506 amperes.
Why it matters: This discrepancy leaves the design team or contractor with conflicting instructions. Resolve the governing requirement before relying on the affected documents.
Suggested next step: Have the electrical engineer verify the fault-current study and applicable equipment or system rating.
RFI draft: Have the electrical engineer verify the fault-current study and applicable equipment or system rating.
Pump supply voltage changes between diagramsElectricalCritical
Summary: The one-line describes a 120/208-volt switchboard and 240-volt pump loads, while the drive control diagram shows a 480-volt supply from that switchboard.
Why it matters: This discrepancy leaves the design team or contractor with conflicting instructions. Resolve the governing requirement before relying on the affected documents.
Suggested next step: Reconcile the utility supply, switchboard, drives, and motor utilization voltage.
RFI draft: Reconcile the utility supply, switchboard, drives, and motor utilization voltage.
Main switchboard rating needs reconciliationElectricalCritical
Summary: A second equipment callout lists 22 kAIC against the same 22,506-ampere available fault current.
Why it matters: This discrepancy leaves the design team or contractor with conflicting instructions. Resolve the governing requirement before relying on the affected documents.
Suggested next step: Check the complete protective arrangement and revise the rating or fault-current value as appropriate.
RFI draft: Check the complete protective arrangement and revise the rating or fault-current value as appropriate.
Anonymized, paraphrased excerpts from a completed project review. These three examples were marked “good catch” in the source review record; that label is feedback, not independent validation. The project total excludes duplicate-group members, dismissed findings, wrong finds, and insufficient-reference findings. Only selected excerpts are published. Customer identity, project address, source identifiers, and private drawings are omitted. Corrections, permit outcomes, and financial savings have not been independently verified. A qualified professional should assess each finding against the complete project documents.
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