Electrical Internal Installation Visual Inspection and Functional Tests Periodic Inspection Report (ZPKR02) and Criteria (ZPKK02): Ministry Format

Ministry of Labor and Social Security, Visual inspection and functional testing of electrical installations. a mandatory report format for periodic inspectionsZPKR02) and control criteria document (ZPKK02(published. The documents were published on July 18, 2025; 01.09.2025 From [date] onwards, the complete use of this format, both in form and content, is mandatory. The format is based on Article 14/B of the Work Equipment Regulation; the main headings and their order remain unchanged, while the size and layout of the content may be adapted. This page summarizes, based on the documentation, what the criteria are looking for and the sections the report consists of.

Scope and report preparation rules

• This document covers the periodic inspections of equipment located in facilities subject to the Electrical Installation Regulations.
• “The "Low Voltage Grounding System Periodic Inspection Report" is a supplementary report for these periodic inspections; conformity assessment cannot be made based solely on this report.
• The inspection report must be prepared separately for each piece of equipment (panel); if the panels are grouped together, a single report can be prepared.
• Findings of non-conformity can be illustrated with photographs as an appendix to the report; findings on group boards should be explained in the notes section along with the board number.
• The functionality of all equipment on the control panel can be checked using the test button.
• In the initial validation tests, insulation resistance checks and voltage drop analyses must be performed.
• If there is any doubt about the make and model of the equipment inside the control panel, additional information should be requested from the manufacturer.
• The checks for equipment such as sockets, cable trays, junction boxes, equipotential bonding bars, motors, and regulators that complete the installation outside the panel are specified in the notes section according to the equipment's characteristics.
• Report Format (ZPKR02) – Periodic Inspection Method and Scope: TS HD 60364-4-43 (Overcurrent Protection), TS HD 60364-6 (Verification), Regulation on Health and Safety Conditions in the Use of Work Equipment, Regulation on Electrical Internal Installations, Regulation on Grounding in Electrical Installations.
• Report format (ZPKR02): Multiple forms must be used in facilities with a large number of panels/equipment.
• Report format (ZPKR02): Multiple forms may be used in facilities with a large number of points, or only section 6 of the form may be duplicated.
• Report format (ZPKR02): This report is valid together with the “Low Voltage Grounding Installation Inspection Report”.

Control criteria (ZPKK02)

Limit values and thresholds in the document

• Ik ＜ Icu: The short-circuit breaking capacity (Icu) of all circuit breakers in the panel must be greater than the panel's 3-phase symmetrical short-circuit current (criterion 1); if the calculated 3-phase short-circuit current exceeds the Icu value of any overcurrent protection device, it is a serious defect (report, Function Tests 1).
• Circuit breaker tripping curve type / category: B=5x, C=10x, D=15x (criterion 3).
• Neutral cross-section: in practice, it is chosen to be half the phase cross-section; in harmonic circuits and where a PEN conductor is used (TN-CS, TN-C), the PEN cross-section is chosen to be the same as the phase cross-section (criterion 10).
• The cross-section of the PEN conductor cannot be smaller than 10 mm² (criterion 10).
• If the PEN conductor cross-section is less than 10 mm², it is a serious defect (report, Functional Tests 7-b, EITY Article 36).
• If the N/PEN cross-section is not equal to the phase conductor cross-section, it is a serious defect; exception example 3×70+35 mm²: the circuit breaker rated current protecting the phase conductors must be determined according to the N/PEN cross-section (35 mm²) (report, Functional Tests 7-a, EITY Article 57b3-ii-1/2).
• PE protective conductor: Check from the table for circuits protected up to 63 A according to ETTY Article 9-e, and by calculation for larger circuits (criterion 11).
• Additional potential equalization conductor (PD) cross-section: minimum 6 mm², maximum 25 mm² (criterion 12).
• Potential equalization conductor PD: 6 mm² ＜ PD ＜ 25 mm² or less, serious defect (report, Functional Tests 9).
• Complementary potential compensation: Severe defect if PD > 4 mm² (report, Functional Tests 10).
• Panel cover connection check 6 mm² (report, Section 5 visual inspection pen).
• If the conductor length cannot be determined from the project, the line distance can be taken as 20 m (criterion 13).
• Cable switch coordination Ib＜In＜Iz; non-compliance for switches with a current carrying capacity greater than the cable (criterion 14); serious defect if not met (report, Function Tests 5).
• The continuity resistance of the potential equalization conductors to the equipotential busbar is Rc ＜ 0.1 Ω (criterion 15).
• In RCD testing, the test current is given as a ramp of 0-180 degrees depending on the equipment type (criterion 15).
• Overvoltage protection category: B=Class I, C=Class II, D=Class III (criterion 15).
• Tesisatta kapsamlı değişiklik eşiği: ＞%20 (rapor, 2.2).
• 30 mA RCD; 40 ms tripping time for 5xI; circuit breaker for circuits <32 A (report, 2.2, TS HD 60364-4-41).
• Overload heating: >70 degrees for PVC cables (report, Section 5 thermal camera).
• If phase access restriction does not provide IP2X protection class, it is a gross defect (report, Visual Inspection 1).
• If the ground insulation resistance is not greater than 50 kΩ, it is a serious defect (report, Functional Tests 6-c, EITY Article 48).

Sections of the report format (ZPKR02)

• 1. COMPANY INFORMATION
• 2. EQUIPMENT INFORMATION (2.1. DETAILED INFORMATION; 2.2. IDENTIFIED INFORMATION)
• 3. THERMAL CAMERA INFORMATION
• 4. INFORMATION ON MEASURING INSTRUMENTS
• 5. CONTROL CRITERIA AND TESTS (heading: TESTS AND CONTROLS)
• 6. FUNCTIONAL CONTROL CRITERIA AND TESTS (6.1. OVERCURRENT DEVICE / CONDUCTOR SUITABILITY – VOLTAGE CONTROL – OVERVOLTAGE DEVICE (OVD) CONTROL – RCD TESTS; 6.2. POTENTIAL EQUALIZING CONDUCTOR CONTROL; 6.3. GROUND INSULATION CONTROL)
• 7. DISCLOSURE OF DEFECTS
• 8. EQUIPMENT PHOTOS
• 9. NOTES
• 10. CONCLUSION AND OPINION
• 11. INFORMATION AND APPROVAL OF THE PERSON AUTHORIZED TO CONDUCT PERIODIC INSPECTIONS.

The main information requested in the report is:

• Heading block: Document Code, Publication Date, Revision Number, Revision Date, Effective Date.
• Company information: Company Name, Periodic Inspection Address, Social Security Registration Number, Report Number, Report Date, OHS-KATIP Contract ID, Periodic Inspection Start Date and Time, Periodic Inspection End Date and Time, Next Periodic Inspection Date.
• Periodic Inspection Method and Scope (pre-written in the form): TS HD 60364-4-43, TS HD 60364-6, Regulation on Health and Safety Conditions in the Use of Work Equipment, Regulation on Electrical Internal Installations, Regulation on Grounding in Electrical Installations.
• Detailed information: Power supplier; Network type (TT / IT / TN; TN-CS / TN-C / TN-S); Network voltage; Is there a project plan for the facility? (Yes/No); Is there a single-line diagram? (Yes/No); Reason for inspection (Periodic Inspection / Initial Inspection); Grounding electrode type (Ring / Surface / Foundation / Deep / Undetermined); Building type (Residential / Commercial / Industrial / Other); Intended use of the equipment; Date of last inspection.
• Number and type of phase conductors: AC column: 1 phase 2 wires, 1 phase 3 wires, 2 phase 3 wires, 3 phase 3 wires, 3 phase 4 wires; DC column: 2 poles, 3 poles, Other. Also included: Basic grounding resistance (Ω), Additional grounding electrode details (if any), System grounding conductor and cross-section, Main equipotential conductor and cross-section.
• Power supply characteristics: Nominal voltage U/Uo(1) kV (value taken from phase 1), Nominal frequency f(1) Hz, Fault current probability IF(1) kA, External loop impedance ZE Ω; Main RCD rated current for TT-TN-S network.
• Main circuit breaker characteristics: Type, Nominal Current; Main RCD test current (mA) and duration (ms) for TT-TNS network.
• Tespit edilen bilgiler: Tesisatta kapsamlı değişiklik var mı? (＞%20) (Var/Yok); Tesisatta aşırı gerilim koruma cihazları (DKD/SPD) kullanılmış mı? (Evet/Hayır); Doğrudan dokunmaya karşı koruma önlemleri (gerilim altındaki bölümlerin yalıtılması (iç kapak veya pleksi koruma), mahfaza (IPXY, pano kilidi, tehlike işareti vb.), engel, el ulaşma uzaklığı dışına yerleştirme, ilave koruma, 30 mA RCD (5xI için 40 ms açma zamanı; devre kesicisi ＜32 A devreler için, TS HD 60364-4-41)); Bir önceki periyodik kontrol etiketi var mı? (Var/Yok).
• Thermal camera information (two device columns): Device name, Calibration date, Calibration validity date, Serial number, Calibration number.
• Instrument information (two instrument columns): Instrument name, Calibration date, Calibration validity date, Serial number, Calibration number.
• Section 5 Visual Inspection (Assessment for each item; with Panel Name/Equipment Identification): Suitability of access to the panel and other equipment (cable network side, cable equipment side, panel fixing (seismic resistance), protection against external impacts, foreign materials around the electrical panel, floor insulation); grounded potential equalization and automatic disconnection of the supply – protection against indirect contact (grounding conductor, main potential equalization conductor, additional potential equalization conductor (complementary), panel cover connection check 6 mm²); prevention of mutually harmful effects (approach to non-electrical installations and other effects, separation of Band I and Band II and Band II insulation, safety circuit separation, panel inner cover/phase access barrier or plexiglass protection); identification (schemas, instructions, circuit drawings and brief information, protective device and terminal label, hazard and other warning signs); cables and conductors (suitability of cable routes and mechanical protection, cable color codes Neutral: Blue, Ground: Yellow/Green, installation method, fire barrier, suitable interlocking and protection against temperature effects); Thermal camera (date of photo, photo number, contact looseness heating, overload heating for PVC cables >70 degrees); general assessments (fire extinguishing system, cleanliness/maintenance status, corrosion control of panel interior and connections, emergency lighting system).
• Section 6 Measurement and Verification Method Selection: Three-Point Comparison / Loop Impedance / Clamp Method.
• Section 6.1 Panel Heading: Panel (Equipment) Name-Label or Code; Phase-to-ground loop impedance (Zx) (Ω) measured from the panel; Phase-to-neutral loop impedance (ZLN) (Ω) measured from the panel; Voltages FF(V), LN(V), N-PE(V); Calculated 3-phase short-circuit current (kA); Overvoltage protection (OPP) type; Overvoltage protection (OPP) withstand current (kA).
• Section 6.1 Line Table Columns: No.; Panel/Table Number - Line Name - Label; Overcurrent protection device tripping curve type, number of poles, In(A), Icu short-circuit breaking current; conductor phase cross-section (mm²), N/PEN cross-section (mm²), PE protective conductor cross-section (mm²), Ib load/design current (A), Iz current carrying capacity (A); RCD test IΔ (mA), TΔ (ms); Result (Note).
• Section 6.2 table columns: No.; relevant section where potential equalization is performed; cross-section of potential equalization conductor (mm²); continuity of potential equalization conductor (Ω); cross-section of supplementary potential equalization conductor (mm², if any); continuity of supplementary potential equalization (Ω); Result (Note).
• Section 6.3 table columns: No.; location of insulation mat (floor insulation); Width (m); Length (m); floor insulation resistance (kΩ); Result (Grade of conformity).
• Sections 7–9: Free space for defect descriptions, equipment photos, and notes.
• Section 10: Opinion on 'suitable for use / unsuitable for use'.
• Section 11: Name, Surname, Profession, Authorized Person Registration Number and Signature of the person authorized to perform periodic inspections; statement: 'This report has been prepared in ……. (written (numbered)) copies.'.

Defect rating and notes in the document

• The 'Notes' row in the criteria table will include: full names, signatures, professional titles, diploma numbers, date and number of those approving the project, project approval validity period, etc.
• Note 1: The degree of defect is indicated by “*” for slightly defective and “**” for defective.
• Note 2: The criteria specified in the inspection report may vary depending on the equipment's place of use, purpose, type, model, etc. If the specified risks are not present in the equipment, based on the relevant manufacturing regulations and/or standards, the inspection criteria will not be sought. The decision on whether or not to seek a criterion for that equipment should be made by paying attention to the legislation and/or standard clauses referenced in the standard clause section; the type, model, year of manufacture, etc., of the equipment for which the criterion should be applied should be evaluated according to the legislation and/or standard clauses. The inclusion of a criterion in the inspection report does not mean that it is a mandatory criterion for every piece of equipment.
• Note 3: Insulation resistance measurements included in functional tests can only be performed during verification checks. They are not performed during periodic checks.
• Note 4: In RCD tests, checks in toroidal residual current switch tests can be performed using the test button.
• Note 5: Measurement uncertainties caused by insulation failures in ground loop impedance measurements will be stated in the Grounding Installation Report.
• Note 4 (numbered 'Note 4' for the second time in the document): The use of thermal cameras for heating and connection point checks is optional; it is sufficient to indicate this on the visual inspection form. Unless otherwise specified by the Ministry, no additional training is required when thermal camera checks are performed.
• Report format (ZPKR02) Section 7: Degree of defect. “*” indicates minor defect and “**” indicates major defect. The evaluation was done as “Suitable”, “Not Suitable” and “Not Applicable”.
• Report Format Section 10 (Conclusion and Opinion): Based on the functional tests and inspections of the electrical installation as of the periodic inspection date, the opinion is written as 'suitable for use/unsuitable for use' under the existing conditions; installations unsuitable for use according to TS HD 60364 standard are marked.
• Report Format Section 10: Minor defects identified must be rectified by the next periodic inspection date; (*) this note will only be written if minor defects are identified.
• Serious defect – Visual Inspection 1: Phase access restriction if it does not meet IP2X protection class.
• Serious defect – Visual Inspection 2: If cable splice points are not insulated, or if there are exposed conductors inside the panel.
• Serious defect – Visual Inspection 3: If contact looseness (series arc) is detected at the connection points of the panel components.
• Serious defect – Visual Inspection 4: If excessive overheating is detected in PVC insulated cables and on touchable non-metallic surfaces of panel components.
• Serious defect – Functional Tests 1: If the calculated 3-phase short-circuit current exceeds the short-circuit breaking capacity (Icu) stated on the label of any overcurrent protection device located inside the panel.
• Serious defect – Functional Tests 2: If the overcurrent protection element values are incompatible with the line cross-section.
• Serious defect – Functional Tests 3: If metal parts within reach are not equipotential with the equipment's ground bar or ground terminal.
• Serious defect – Functional Tests 4: If RCD performance test results are insufficient.
• Serious defect – Functional Tests 5: If Ib < In < Iz are not met for Circuit Design Current (Ib), Circuit Breaker Current (In), and Cable Current Carrying Capacity (Iz).
• Serious defect – Functional Tests 6 (ground insulation): b) If the ground insulation within reach is not of the appropriate size (EITY Article 33d); c) If the ground insulation resistance is not greater than 50 kΩ (EITY Article 48).
• Serious defect – Functional Tests 7 (N/PEN): a) If the N/PEN cross-section is not equal to the phase conductor cross-section (EITY Article 57b3-ii-1); exception: If the N/PEN cross-section is smaller than the phase conductor cross-section (e.g., 3×70+35 mm²), and the rule that the rated circuit breaker current protecting the phase conductors must be determined according to the N/PEN conductor cross-section (35 mm² in the example) is violated (EITY Article 57b3-ii-2); b) If the PEN conductor cross-section is not >10 mm² (EITY Article 36); c) If the rule that the PEN conductor must not be routed through areas with fire hazards is violated (EITY Article 64); d) If the rule that the PEN conductor must not be routed through Exproof hazardous area boundaries is violated (IEC 60079-14).
• Serious defect – Functional Tests 8 (PE): If the cross-section of the protective conductor does not conform to the calculation result given in ETTY Article 9e1i and the table given in ETTY Table 8.
• Serious defect – Functional Tests 9 (PD): 6 mm² ＜ PD ＜ 25 mm² if not.
• Serious defect – Functional Tests 10: If the complementary potential equalization PD is not > 4 mm². (The above situations are considered serious defects.)
• Report format Section 10 classification: C1 – Hazard present. Risk of injury. Immediate corrective action required. C2 – Potentially hazardous – urgent corrective action required. C3 – Improvement recommended.

The scope of AES Innovation

This inspection is covered by AES Innovation's TÜRKAK accreditation (TS EN ISO/IEC 17020, AB-0631-M). The Ministry requires accredited inspection bodies to include the organization's logo, trade name, and TÜRKAK accreditation mark on their reports in this format.

For the inspection to be carried out, a contract must be drawn up and approved between the employer and the authorized person conducting the inspection via the ISG-KATIP system at least one day prior to the inspection; a report issued without such a contract is invalid.

Relating to: Service page · ISG-KATIP contract and mandatory report formats · Work Equipment Regulation and Annex III

Sources

• Ministry of Labor and Social Security Work Equipment documents: ZPKK02 and ZPKR02 (Mandatory Documents)
• Ministry of Labor and Social Security: Mandatory periodic inspection report format and criteria for electrical group work equipment.

Frequently Asked Questions

Since when has the ZPKR02 format been mandatory?

According to the ministry's announcement, as of September 1, 2025, the complete and accurate use of this format, both in form and content, is mandatory for periodic visual inspections and functional tests of electrical installations.

Can the format's appearance be changed?

The content can be used with the same size and layout as the main headings, but without changing their order.

Is every item in the criteria document required for every piece of equipment?

No. According to the document's note, the criteria may vary depending on the equipment's place of use, purpose, type, and model; whether or not a criterion is required for that equipment is determined by examining the relevant legislation and standard articles.