top of page

Solar Substation Control Enclosure As-Built Drawings

< Back
Client office Erie, PA; project site Hoke County, NC

Client

Confidential (prefabricated electrical enclosure manufacturer, Erie, PA)

Industry

Utility-scale solar / substation control enclosure

Location

Client office Erie, PA; project site Hoke County, NC

Dates

July 2026 to August 2026 (proposal 7/25/2026; field markups updated through 8/2/2026; work complete by 8/7/2026)

Team Size

1 PE plus CAD drafting support

Services

  • Review of electrician red-lines for correctness

  • As-built update of five wiring sheets in AutoCAD

  • Cross-sheet consistency check

  • Questions list and one review cycle

Summary

After an enclosure was wired in the field, the customer accepted it as built but wanted the drawings to match. MHL reviewed the electrician’s red-lines, checked them against each other, and produced clean as-built sheets for the five affected drawings.

Problem / Objective

Field changes had been marked on the issued wiring diagrams and partly folded into Rev. 6. The objective was a correct, internally consistent as-built set, focused on the alarm cabinet, so the enclosure could ship with accurate documentation.

Process

  1. Received the electrician’s markups and terminal schedules.

  2. Reviewed each red-line for correctness: terminal references, panel schedule against wiring, relay logic across sheets.

  3. Sent questions back on illegible or ambiguous markups; the field contractor later added a second relay for HVAC shutdown (8/2/2026).

  4. Updated five sheets in native CAD: AC power, control enclosure alarms, lighting and ventilation, lighting contactor, and alarm cabinet.

  5. Issued the as-built set for one review cycle.

Payoff / Results (Metrics)

  • Five sheets reconciled to what was actually built

  • Alarm cabinet terminal schedules and point-to-point wiring checked against the electrician’s lists

  • Cross-sheet conflicts flagged instead of transcribed

When this applies

A panel or enclosure manufacturer whose electrician red-lined the wiring diagrams in the field and who needs an engineer to verify the changes and turn them into a clean, consistent as-built drawing set before shipment or customer acceptance.

Testimonial

Assets

bottom of page