Electrical Construction Completion Management: A Field Guide

Electrical construction completion management in Korea means confirming that a project has been finished in line with the design documents and applicable law: running a pre-completion inspection and then the final completion inspection, commissioning the installed facilities, reviewing the operation and maintenance (O&M) manual, and handing over the as-built documents and facilities to the client. It is the last stage of the project, but it feeds directly into final cost settlement and defect liability, so a single missing record can hold up project closeout. This guide breaks the work into four stages — inspection, commissioning, O&M manual and handover.

Contents

• Common Pre-Completion Review
• 1. Pre-Completion and Final Completion Inspection
• 2. Electrical Facility Commissioning
• 3. O&M Manual Review
• 4. As-Built Documents and Facility Handover
• Completion Inspection Document Checklist
• FAQ
• Reference Standards
• Summary

Common Pre-Completion Review

Before entering the completion stage, re-check the design documents (drawings, specifications and bill of quantities), the contract conditions and every design change made during construction, and agree on the baseline against which completion will be judged. Then confirm that the records kept by the resident supervisor (상주감리원), stage-by-stage inspection records, construction photos and quality test results are complete. Check measuring equipment such as insulation resistance testers and earth resistance testers in advance. Make sure everyone on site wears hard hats, safety vests, safety shoes, harnesses, safety glasses, dust masks and insulating clothing, and carries lanterns and radios. Have computers and document software ready for the closeout paperwork.

1. Pre-Completion and Final Completion Inspection

1. Compare the design documents with the quantities actually installed to identify surplus materials, and request that they be reflected as a change amount in the final cost settlement.
2. Assess whether the work can be completed within the scheduled period, and request a pre-completion inspection (예비준공검사) so outstanding items can be fixed in advance.
3. Review the pre-completion inspection findings against the design documents and approved shop drawings, correct the defects, pass the re-inspection, and then submit the application for completion inspection (준공검사원).
4. After submitting the application, undergo the completion inspection and request completion processing based on the result.
5. In time for the completion inspection, prepare the documents, records and spare parts needed for facility handover.

What the completion inspection typically checks

• Whether the finished facilities were built according to the design documents
• The records prepared and kept on site by the resident supervisor during construction
• Whether scrap and recovered materials were generated and, if so, properly disposed of
• Whether owner-furnished materials were used correctly, and whether surplus materials were handled properly
• Whether all temporary works have been removed and the site restored
• The supervisor’s review opinion on the completion inspection application

The contractor must fully resolve every pre-completion finding and obtain confirmation from the responsible supervisor (책임감리원) before submitting the completion inspection application. For public projects, the inspection rules of the State Contract Act, the Local Government Contract Act and the accounting regulations apply; for supervised projects, the Guidelines for Electrical Installation Construction Supervision (전력시설물 공사감리업무 수행지침) also apply — so confirm who inspects and the processing deadlines in the contract first.

2. Electrical Facility Commissioning

1. Obtain the commissioning plan from the manufacturer or installer, agree the scope and duration with the building, mechanical and fire-protection trades, and prepare the project commissioning plan.
2. Prepare for commissioning — visual inspection, power supply, fuel, parts and measuring instruments — and then carry out the test run.
3. For equipment linked to other trades, verify performance such as operating condition, direction of rotation and noise level with the relevant trade representatives present.
4. Judge whether the results meet the design criteria; facilities that have completed commissioning can be handed over in part ahead of the rest.
5. After commissioning, prepare the commissioning test report (시운전검사결과보고서).

Customer-owned electrical installations such as substations must pass the pre-use inspection (사용전검사) under the Electrical Safety Management Act before they can be energized for use, so coordinate the commissioning schedule with the pre-use inspection.

3. O&M Manual Review

1. Select the facilities subject to maintenance management, and obtain and review maintenance data from the suppliers.
2. Review, trade by trade, the material that includes commissioning results — performance tests, equipment specifications, functional descriptions, maintenance methods and warranties — and prepare the O&M manual (유지관리지침서).
3. If the client asks for an outside expert to review specialist technical content in the manual, decide on external review through consultation.

The O&M manual is written for the people who will run the facility after completion. If commissioning values or warranty conditions are missing, it becomes hard to judge later defects, so cross-check the manual against the commissioning test report.

4. As-Built Documents and Facility Handover

1. Prepare a handover list of completion documents and request the client’s approval of the acceptance plan.
2. Review the completion documents and site records, then hand them over to the client.
3. Confirm that the as-built drawings (준공도면) reflect the work exactly as built, then submit them to the client.
4. Prepare the completion documents in the form specified in the contract.
5. Once the pre-completion inspection is finished, prepare the facility handover plan.
6. Prepare a list of facilities to be handed over and submit it to the client.

As-built drawings are the final drawings that incorporate every design change made during construction. Handover documents typically include the as-built design documents, completion report, O&M manual and defect liability bond (하자이행증권). If disagreements arise during handover, a review opinion describing the situation and the proposed remedy must be prepared. For how these records build up during the project, see Electrical Construction Documentation in Korea: A Field Guide.

Completion Inspection Document Checklist

Category	Documents and items to confirm
Materials	Inspection and inventory records for key equipment; status of owner-furnished materials and handling of surplus
Quality	Summary of quality test and inspection results; whether rating and quality tests were performed on the materials used
Records	Stage inspection records; photos of key construction steps
Safety / prior checks	Safety inspection summary; documents confirming prior inspections
Recovered items	Register of recovered and scrap materials
Other	Any items the inspector deems necessary

FAQ

Reference Standards

• Act on Contracts to Which the State is a Party (국가를 당사자로 하는 계약에 관한 법률) — law.go.kr
• Act on Contracts to Which a Local Government is a Party (지방자치단체를 당사자로 하는 계약에 관한 법률) — law.go.kr
• Electric Technology Management Act (전력기술관리법) — law.go.kr
• Guidelines for Electrical Installation Construction Supervision (전력시설물 공사감리업무 수행지침) — law.go.kr
• Electrical Construction Business Act (전기공사업법) — law.go.kr
• Electrical Safety Management Act (전기안전관리법) — law.go.kr
• Construction Technology Promotion Act (건설기술 진흥법) — law.go.kr
• Korea Electro-technical Code (KEC, 한국전기설비규정) — law.go.kr
• NCS competency unit Electrical Construction Completion Management (전기공사 준공관리, 1901070407_22v1; NCS is Korea’s National Competency Standards) — ncs.go.kr

Summary

The most common mistake in electrical construction completion management is treating completion as “one inspection” and rushing the as-built drawings and O&M manual at the very end. Use the pre-completion inspection to catch gaps early, prove performance with commissioning results, and hand the facility to its next operator with a complete O&M manual and as-built set — that is what keeps closeout and final settlement on track. The inspection records built up during quality management become the evidence for the completion inspection. A Korean version of this guide is available here.

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This article restructures the Korean NCS competency unit ‘Electrical Construction Completion Management’ (전기공사 준공관리, code 1901070407_22v1) as a practical reference. Actual work must follow applicable standards and the judgment of qualified professionals; always confirm specific values against the latest regulations.

Written/reviewed by VOLT · Last updated 2026-10-25