Understand what the Electrical Installations Record (PIE) is, who must maintain it, which documents make up the record, how to keep it updated, and what changes with the new NR-10 in 2027.
Check it out!
The Electrical Installations Record (PIE) is an organized structure of documents and technical evidence that makes it possible to understand, control, and demonstrate the safety condition of electrical installations and the work performed on them. In practice, a technically useful PIE is not a static folder: it must reflect the actual installation, authorized workers, risks, procedures, inspections, tests, and applicable preventive measures.
Until May 31, 2027, the current wording of NR-10 remains applicable and uses installed load above 75 kW as the criterion for establishing and maintaining the PIE. The new wording published by MTE Ordinance No. 737/2026 takes effect on June 1, 2027 and substantially reorganizes electrical-safety documentation, including the criterion for organizing the record.
For companies that need to prepare, review, or update the record, the issue is therefore not merely “having a PIE.” Engineering work must identify what is required today, what will change during the regulatory transition, and which technical gaps must be corrected so that the documentation matches the actual condition found in the field.
What Is the Electrical Installations Record (PIE)?
The current wording of NR-10 treats the PIE as a set of electrical-safety documents that must be organized and kept up to date. The new wording, effective from June 2027, makes this concept even more explicit by defining the record as an organized system containing a dynamic memory of information relevant to installations and workers, in physical or electronic form.
This definition helps distinguish a technically mature record from a simple collection of files. A single-line diagram may exist and still be outdated. An inspection report may have been issued while its recommendations remain unresolved. A protection study may no longer reflect settings implemented in the field. Training certificates may exist while the worker-authorization matrix is inconsistent with the activities actually performed.
Therefore, preparing or updating the PIE must address documentation, engineering, and governance simultaneously. The A3A Engenharia Electrical Installations Record service describes this work as document and field diagnosis, technical updating, treatment of nonconformities, and traceable organization of evidence.
Who Must Maintain the PIE Under NR-10 in 2026?
Until May 31, 2027, the previous wording of NR-10 remains in force. Item 10.2.4 requires establishments with installed load above 75 kW to establish and maintain the Electrical Installations Record. The current wording also establishes additional requirements for companies operating installations or equipment that are part of the Brazilian Electric Power System (SEP) and for companies performing work near the SEP.
It is important not to turn the 75 kW threshold into a false safety boundary. Even when an organization does not fall under that specific PIE trigger, the current NR-10 contains other obligations related to single-line diagrams, control measures, design safety, procedures, qualification, professional licensing, training, authorization, and working conditions. In addition, low-voltage installations remain subject to applicable technical standards and occupational-safety requirements.
For procurement decisions, the first step should be to identify the establishment’s actual classification: installed load, voltages present, relationship with the SEP, existence of hazardous areas, worker profile, activities performed, temporary or permanent installations, and existing documentation condition.
What Changes in the PIE Under the New NR-10 from June 2027?
MTE Ordinance No. 737/2026 established that the new wording of NR-10 will take effect on June 1, 2027. The new text no longer reproduces the former 75 kW PIE trigger and reorganizes the documentation chapter.
Under the new structure, every organization must have an electrical design compliant with the design-safety chapter and documentation of inspections and measurements of electrical earthing systems. Organizations with authorized workers must maintain specific documentation covering procedures, risk assessments, work permits, collective protective equipment, PPE, tools, qualification, professional licensing, training, authorizations, and applicable insulation tests. Organizations with hazardous areas have an additional set of evidence requirements.
New item 10.15.6 requires the documentation listed in the preceding items to be organized as a PIE, under the responsibility of a Legally Qualified Professional (PLH), for organizations that are part of the SEP or perform activities on medium- and high-voltage electrical installations. The text also includes emergency-response procedures in the PIE and requires technical documents included in the record to be prepared by a PLH.
The practical consequence is significant: organizations that currently structure their program only around the 75 kW threshold need to review their classification and documentation architecture before the new wording takes effect. At the same time, the new NR-10 increases the importance of keeping designs, grounding, procedures, risks, and evidence current even outside the PIE itself.
The NR-10 transition is an engineering window, not merely a compliance exercise.
Using 2026–2027 merely to change the record index misses the main opportunity. The most valuable work is to review the baseline: design, field condition, grounding, workers, procedures, studies, and evidence that will need to support the new documentation architecture.
What Must the PIE Contain Under the Rules in Force Until May 2027?
Under the wording currently in force, the PIE for establishments covered by item 10.2.4 includes the updated single-line diagram and a minimum set of safety documents. The function of each document is more important than merely checking its existence on a checklist.
| Element | What it should demonstrate in practice | Common audit failure |
| Updated single-line diagrams | Actual installation configuration, grounding, and protective devices | Historical diagram inconsistent with installed panels and circuits |
| Procedures and instructions | How risks are controlled during operation and intervention | Generic procedure unrelated to the installation and task |
| SPDA and grounding inspections and measurements | Verified condition, results, criteria, and traceability | Standalone report with no treatment of nonconformities |
| Collective protection, PPE, and tools | Suitability for hazards and activities | Equipment list not linked to risk assessment |
| Qualification, professional licensing, training, and authorization | Who may perform which activities and under what conditions | Existing certificates but outdated authorization matrix |
| Applicable insulation tests | Condition of protective equipment | Expired or non-traceable evidence |
| Hazardous-area certifications, when applicable | Compliance of equipment and materials with the environment | Incomplete documentation or documentation disconnected from the area-classification study |
| Technical inspection report | Recommendations and upgrade schedule | List of pending items without owner, priority, or closure |
A3A Engenharia recommends treating this set as a PIE Master Matrix, identifying the document, revision, date, responsible party, source, related installation or asset, validity condition, pending items, and links to corrective actions. This organization is not a literal transcription of NR-10; it is a document-governance practice that makes the record auditable and operationally useful.
An existing document is not necessarily valid evidence.
In a PIE review, each document must be checked against its revision, the asset to which it applies, the condition found in the field, and subsequent actions. This control is what transforms a historical file into usable technical evidence.
PIE Is Not a Document Folder: It Is Governance of the Electrical Condition
The difference between a formal record and a useful record becomes evident during maintenance, an audit, an expansion, or an incident. If no one can state which single-line diagram is the latest approved version, which protection settings are currently in force, or which report closed a nonconformity, the existence of hundreds of PDFs does little to control risk.
A mature PIE should answer objective questions: what is the current electrical configuration? Which risks have been identified? Which workers are authorized for each activity? Which protective devices were verified? Which studies support the settings? Which pending items remain open? Which documents must be revised after a modification?
This approach brings the PIE closer to the logic of a technical-information management system. In complex or multi-site installations, it is advisable to adopt coding, revision control, a master list, discipline owners, approval status, and traceability among documents, assets, inspections, and corrective actions.
How to Prepare or Update a PIE Consistently from a Technical Perspective
The update should not begin by formatting a final folder. It begins by identifying the reference condition.
1. Document inventory and gap analysis. Designs, diagrams, design narratives, studies, reports, procedures, worker records, inspections, and existing evidence are gathered. Each item is classified by availability, revision, reliability, applicability, and need for updating.
2. Field survey. Documentation is checked against switchboards, feeders, panels, grounding systems, SPDA, machines, hazardous areas, protective devices, and actual operating conditions. When a drawing does not match what is installed, the discrepancy must be recorded and addressed.
3. Update engineering. Depending on the gaps, it may be necessary to develop a Low-Voltage Electrical Design, update single-line diagrams, conduct short-circuit and selectivity studies, perform incident-energy analysis, develop grounding design, review main LV switchboards and panels, prepare As-Built documentation, or produce other technical documents.
4. Inspections, measurements, and tests. Evidence relating to grounding, SPDA, continuity, insulation, protective devices, and other applicable systems should include method, identification of the tested object, result, criterion, instrument, and traceability. The Electrical Installation Inspection is the bridge between declared documentation and the condition found in the field.
5. Procedures, risks, and authorizations. Installation engineering must be aligned with how work is actually performed. Procedures, risk assessments, permits, lockout, de-energization, emergency response, collective protection, PPE, and worker authorization should not exist as independent and contradictory documents.
6. Upgrade plan and closure. Nonconformities need criticality, an owner, a deadline, recommended action, closure evidence, and, where applicable, updates to affected documents. A PIE that merely records problems without governing closure still describes an incomplete condition.
7. Controlled issue. The final version should be organized for consultation, maintenance, and auditing, with revision control and rules for incorporating future modifications. The objective is to preserve the technical memory of the installation throughout its life cycle.
Which Technical Evidence Makes a PIE Defensible?
A robust PIE is not measured by the number of files stored, but by its ability to demonstrate that the documentation represents the actual installation and that safety measures were verified against identifiable technical criteria. This requires distinguishing administrative documents, worker records, and engineering evidence.
Not all studies and tests below are mandatory for every installation or every PIE classification. The need depends on system characteristics, activities performed, existing risks, and applicable standards. When evidence is necessary, however, it must be traceable to the asset, the method used, the document revision, and the actual condition found in the field.
| Engineering evidence | What it should demonstrate | Technical reference for evaluation |
|---|---|---|
| Single-line diagram and As-Built documentation | Actual configuration of sources, feeders, switchboards, protection, grounding, and interconnections. Documentation must track relevant installation modifications. | NBR 5410 requires, at final verification, that documentation provided to the inspection team reflect the installation “as built.” |
| Visual inspection of the installation | Condition of components, protection against electric shock and thermal effects, wiring systems, protective and isolating devices, identification, connections, and accessibility. | NBR 5410, Section 7.2. |
| Electrical tests | Continuity of PE and equipotential bonding, insulation resistance, automatic-disconnection conditions, operation of devices, and other relevant checks. | NBR 5410, Section 7.3. |
| Grounding and measurements | Measured object, method, test conditions, instruments, results, and interpretation. An isolated resistance value in ohms does not replace understanding of the grounding system. | NBR 5410 and NBR 15749, which establishes criteria for measuring grounding resistance, step and touch potentials, and evaluating results. |
| SPDA | Design or As-Built, inspections, continuity, subsystem condition, applicable SPDs, maintenance plan, and treatment of nonconformities. | NBR 5419-3:2026, Section 7, covering SPDA inspection, maintenance, and documentation. |
| Short circuit, protection, and selectivity | System assumptions, fault levels, devices, and settings supporting installation protection and required continuity. | NBR 5410 for coordination/selectivity and, where there is an incident-energy study, data consistent with the model used. |
| Incident energy and arc flash | Operating scenarios, updated electrical baseline, fault-clearing time, equipment-specific results, control measures, labeling, and review triggers. | NBR 17227:2025, especially Sections 5, 10, and 11. |
| Upgrade plan and closure evidence | Which nonconformity was treated, which action was performed, who held technical responsibility, which evidence proves closure, and which documents were affected. | Technical governance of the PIE and revision control of affected documents. |
This perspective changes how the record is audited. For example, an existing single-line diagram may be inadequate evidence if it does not represent the current installation; a grounding report may be insufficient if it does not identify the measurement method and tested object; and a protection study may lose practical validity if field circuit-breaker settings have been changed without updating the report.
Single-line documentation, electrical tests, the incident-energy study, grounding documentation, and SPDA records must, where applicable, converge on the same technical baseline.
The PIE is only as reliable as the consistency among its documents.
If the single-line diagram shows one protection device, the study uses another, the field has a third setting, and the As-Built does not record the change, the problem is not merely documentary: control over the electrical configuration has been lost.
PIE and Electrical Configuration Management: What Should Trigger a Review?
One of the most important functions of a mature record is to prevent documentation from becoming frozen while the installation continues to change. Electrical configuration management must establish objective triggers for reviewing diagrams, studies, reports, procedures, inspections, and associated records.
NBR 5410 requires new installations, extensions, and modifications to be inspected and tested before being placed in service and requires the documentation used in verification to represent the “as-built” condition. NBR 5419-3:2026, in turn, requires SPDA inspection after installation, at issuance of the As-Built, and after physical, use-related, or system changes that alter the conditions originally considered.
NBR 17227:2025 reinforces the same logic for incident energy. The study must be managed from an updated electrical baseline and reviewed whenever changes may alter incident-energy levels or protection behavior. Triggers explicitly addressed by the standard include:
- changes to circuit-breaker or relay settings and, consequently, fault-clearing time;
- replacement of protective devices with equipment having different characteristics;
- changes in the number, rating, or impedance of transformers;
- changes in the primary or secondary system topology;
- changes in conductor lengths, cross-sections, or installation methods;
- addition, removal, or significant change of motors and other sources contributing to short-circuit current;
- changes in the short-circuit level reported by the utility or resulting from internal generation;
- changes in procedures or working distances considered;
- standards revisions affecting incident-energy, PPE, collective-protection, or procedural criteria.
These triggers show why an apparently simple change — such as replacing a circuit breaker, installing a new transformer, adding generation, changing a feeder, or modifying a panel — may affect several PIE documents. The impact may extend to short circuit and selectivity, incident energy, diagrams, protection settings, operating procedures, and the As-Built itself.
Traceability Matrix for PIE Control
As an engineering and governance practice, A3A Engenharia recommends that the PIE Master List or Matrix control more than file names. For higher-criticality installations, it is useful to record at least: associated asset or system; document; code and revision; technical owner; related standard or requirement; date and source of evidence; last field verification; pending items; corrective action; document affected by the action; closure owner; status; and next review requirement.
This structure is not a form literally prescribed by NR-10. It is a traceability methodology that makes it possible to answer an essential question in audits and engineering decisions: which evidence demonstrates the current condition of this asset, and which other evidence must be updated if it is modified?
When the organization cannot answer this question, updating the PIE tends to require a combination of document inventory, field survey, Engineering As-Built, inspections, studies, and a structured upgrade plan.
When Should the PIE Be Reviewed or Updated?
NR-10 requires applicable documentation to be kept up to date, and engineering must translate this principle into review triggers. It makes little sense to wait for a universal “PIE expiration date,” because different documents have their own cycles, events, and criteria.
A review should be considered when there is load expansion, new panels or feeders, transformer changes, protection changes, retrofit, installation of on-site generation, addition of machines, layout changes, modification of hazardous areas, grounding or SPDA updates, brownfield work, process changes, accidents, audit recommendations, or discrepancies between documentation and field conditions.
It is also advisable to perform a governance review before major audits, acquisition processes, insurance contracting, major shutdowns, modernizations, or multi-site standardization programs. In these contexts, the PIE is not merely compliance evidence; it becomes an information source for investment and risk decisions.
What Is the Relationship Among the PIE, NBR 5410, NBR 5419, and NR-10?
NR-10 is a regulatory standard for occupational safety and health. NBR 5410 is a central technical standard for low-voltage electrical installations. The ABNT NBR 5419:2026 series addresses lightning protection, including risk assessment, external SPDA, protection measures for internal systems, grounding, equipotential bonding, and surge protection. In a real installation, these references converge on topics such as design, grounding, protection, inspections, and documentation.
The technical article on NBR 5410 should be used to explore low-voltage installation criteria in greater depth. The NR-10 content path addresses the occupational-safety system and its integration with engineering. Where SPDA and surge protection are involved, NBR 5419 forms another layer of the analysis.
The practical recommendation is to avoid auditing “document by document.” A more robust approach is to verify whether the requirements converge on a coherent field condition: updated design, adequate protection, verified grounding, controlled risks, authorized workers, applicable procedures, and traceable evidence.
PIE and NR-12: Where Do the Two Areas Intersect?
NR-12 has its own objective and scope for occupational safety involving machinery and equipment; it should not be treated as merely an appendix to the PIE. However, in industrial plants, compliance projects often reveal interfaces between the electrical safety of the installation and machine safety.
Examples include machine power supply and isolation, panels, control and power circuits, grounding, identification, stop interfaces, electrical interventions, documentation, energy lockout, and modifications carried out throughout equipment life cycles. An industrial Due Diligence can therefore generate a coordinated NR-10 and NR-12 plan without confusing the technical ownership of each standard.
For A3A Engenharia, this interface is especially relevant when the client is not merely seeking a report, but needs to understand what exists, what is outdated, which risks are critical, which documents must be reissued, and which upgrades must enter CAPEX or an implementation plan.
NR-10 and NR-12 should work together in the field without losing their boundaries.
In industrial plants, the best approach is to coordinate interfaces between electrical installations and machinery — power supply, isolation, panels, controls, grounding, and energy lockout — while keeping clear which requirement belongs to each standard and which action requires design or physical upgrades.
PIE as a Starting Point for Electrical Due Diligence
Electrical Due Diligence has a broader scope than checking whether certain PDFs are present. It seeks to establish a reliable view of the technical condition of the installation, the quality of its documentation, and exposures that may create risk, downtime, cost, or upgrade obligations.
The PIE is an excellent entry point because it concentrates evidence capable of revealing engineering gaps. An outdated single-line diagram may indicate the need for field survey and As-Built. The absence of a protection study may lead to short-circuit, selectivity, and incident-energy studies. Grounding inconsistencies may require measurements, design, or upgrades. Old panels may require inspection, retrofit, and assessment against applicable requirements. Procedures inconsistent with the installation may require a safety and governance review.
The output of Due Diligence should not be a generic “compliant/noncompliant” list. To support decisions, findings should be classified by risk, operational criticality, applicable requirement, evidence, recommended action, urgency, dependencies, and estimated effort or investment where the scope allows.
The PIE can be the entry point to a broader engineering program.
When an audit finds outdated single-line diagrams, missing studies, grounding without evidence, obsolete panels, or field discrepancies, the requirement ceases to be merely documentary and starts to involve design, inspection, studies, As-Built, upgrades, and CAPEX planning.
PIE in Power Plants, Industrial Facilities, and Multi-Site Operations
The greater the number of sites, the more important standardization becomes. If each plant structures nomenclature, folders, inspection criteria, reports, and matrices differently, comparing risks and prioritizing corporate investments becomes difficult.
In a multi-site program, engineering can define a common document taxonomy, minimum templates, evidence criteria, a gap matrix, coding standards, and a single methodology for prioritizing upgrades. The gain is not merely documentary: the organization gains visibility into recurring issues, critical assets, obsolescence patterns, and opportunities for contracting at scale.
Power plants and installations that interact with the SEP or perform medium- and high-voltage activities deserve additional attention during the transition to the new NR-10 because the new PIE organization criterion is directly related to these contexts.
In multi-site operations, standardizing the method is as important as updating each document.
A common corporate matrix makes it possible to compare sites, identify recurring issues, prioritize risks, and transform dozens of local pending items into a coordinated program of engineering, documentation, and investment.
Common Errors in Preparing and Updating the PIE
One of the most frequent mistakes is contracting the record as an exclusively documentary activity. If documents are produced without sufficient field survey, the result may look organized while still describing an installation that no longer exists.
Other recurring issues include single-line diagrams without revision control; inspection reports with unresolved findings; protection studies inconsistent with implemented settings; grounding or SPDA documents without clear identification of measured points; generic procedures; outdated worker matrices; certificates unrelated to authorized activities; and brownfield modifications executed without updating the As-Built.
Another problem is confusing technical responsibility with the existence of a single generic ART for the entire record. NR-10 requires a legally qualified professional for technical documents as provided by the applicable wording. ART, in turn, arises from professional legislation governing contracted engineering activities and services: it must adequately record the scope and technical professionals responsible for the activities performed. The ART structure must correspond to the service actually developed rather than being used as a simple documentary “seal.”
Which Deliverables Are Part of a Mature PIE Update?
The final set depends on classification and identified gaps, but an engineering engagement may result in a document inventory, gap matrix, master list, field survey, updated diagrams, design narratives, inspection and measurement reports, electrical studies, nonconformity records, an upgrade plan, procedures, responsibility matrices, action traceability, and a controlled final repository.
Not every client will need to recreate all of these documents. The best engagement separates existing and valid documents, documents requiring revision, missing documents, evidence dependent on fieldwork, and physical upgrades that should be handled through subsequent design or implementation.
This separation reduces rework and transforms the PIE into a risk-oriented engineering program rather than a documentary package with an artificially fixed scope.
When Should an Independent PIE Review Be Commissioned?
An independent review becomes valuable when the organization needs to reduce uncertainty: before an audit, during acquisitions or transactions, after long periods without updates, during modernization programs, in preparation for major shutdowns, under Owner’s Engineering contracts, where multiple sites exist, or when internal owners cannot confidently state whether documentation matches field conditions.
In these situations, the objective is not to replace the organization’s maintenance or safety engineering. It is to establish a verifiable technical baseline, identify gaps, and provide a decision structure so that internal owners, engineering, Occupational Safety, operations, maintenance, and management can prioritize the next actions.
PIE preparation and updating can be contracted together with inspections, surveys, designs, studies, and documentation where existing conditions require a broader review.
Conclusion
The Electrical Installations Record should represent the technical and safety memory of the installation — not merely prove that files have been gathered. The more critical the operation, the more important it is to ensure consistency among documentation, field conditions, workers, procedures, protection, inspections, and upgrade actions.
The 2026–2027 regulatory transition makes this topic even more relevant. Until May 31, 2027, the current PIE criterion remains in force; from June 1, 2027, a new documentation architecture and a new criterion for organizing the record take effect. Companies that begin reviewing their records based on the actual condition of the installation, rather than merely on the previous document structure, will be better prepared for the transition and for future engineering decisions.
Technical References
[1] BRASIL. Ministério do Trabalho e Emprego. NR-10 — Segurança em Instalações e Serviços em Eletricidade. Wording in force until May 31, 2027. Consult the official text on the MTE.
[2] BRASIL. Ministério do Trabalho e Emprego. New NR-10 — Safety in Electrical Installations and Electricity Services. MTE Ordinance No. 737/2026; effective June 1, 2027. Consult the official publication on the MTE.
[3] BRASIL. Ministério do Trabalho e Emprego. Regulatory Standard No. 10 — official page, history, and current and future texts.
[4] BRASIL. Law No. 6,496 of December 7, 1977. Establishes the Anotação de Responsabilidade Técnica (ART).
[5] CONSELHO FEDERAL DE ENGENHARIA E AGRONOMIA. Anotação de Responsabilidade Técnica — ART. Consult the applicable regulations at Confea.
[6] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. ABNT Catalog — consultation of current editions of technical standards.
[7] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. ABNT NBR 5410:2004 — Low-voltage electrical installations. Final verification, visual inspection, testing, maintenance, grounding, and As-Built documentation.
[8] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. ABNT NBR 5419-3:2026 — Protection against lightning — Part 3: Physical damage to structures and life hazard. SPDA inspection, maintenance, continuity, and documentation.
[9] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. ABNT NBR 15749:2009 — Measurement of grounding resistance and surface potentials in grounding systems.
[10] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS. ABNT NBR 17227:2025 — Arc flash — Incident-energy risk management, precautions, and calculation methods. Corrected version 3, dated April 27, 2026.
Frequently Asked Questions
The Electrical Installations Record is the organized structure of documents and technical electrical-safety information applicable to the installation and workers. The current wording and the new NR-10 use different classification criteria, so the organization must verify which rule is in force on the assessment date.
Until May 31, 2027, the previous wording of NR-10 remains in force. Item 10.2.4 requires a PIE for establishments with installed load above 75 kW, in addition to specific requirements related to the SEP. The new wording takes effect on June 1, 2027 and changes the criterion.
The new wording published in 2026, effective June 1, 2027, does not reproduce the former 75 kW trigger for organizing the PIE. New item 10.15.6 links the PIE to organizations that are part of the SEP or perform activities on medium- and high-voltage electrical installations, without eliminating the other documentation obligations established by NR-10.
Applicable documentation must remain up to date. Instead of assuming a single validity period for the PIE, the organization should establish review triggers for installation modifications, new equipment, extensions, protection changes, inspections, studies, worker and procedure changes, accidents, audits, and regulatory transitions.
It is not appropriate to treat ART as a single generic seal for the record. NR-10 defines responsibilities of legally qualified professionals for technical documents according to the applicable wording. Law No. 6,496/1977 and the rules of the Confea/Crea system govern ART for contracted engineering activities and services; the record must reflect the technical scope actually performed.
No. NR-10 and NR-12 have their own objectives and scopes. In industrial facilities, however, Due Diligence may identify interfaces between electrical installations and machinery, requiring coordinated design, documentation, and upgrade actions without mixing the requirements of each standard.
Additional Technical Materials
Related Solutions
Related Engineering Services
- Electrical Installations Record — service
- Electrical Installation Inspection
- Low-Voltage Electrical Design
- Incident Energy and Arc-Flash Risk Study
- Commissioning and Acceptance of Electrical Installations
- As-Built and Final Technical Documentation
Related Technical Content
- Electrical Single-Line Diagram
- Electrical As-Built
- Incident Energy Calculation and NBR 17227
- Electrical Testing in Installations
- NBR 5410: Application to Low-Voltage Electrical Installations
