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CQC11-462123-2021: Safety Certification Rules for Terminal Blocks
CQC11-462123-2021
CQC
PRODUCT SAFETY CERTIFICATION RULES
Safety Certification Rules for Terminal Blocks
ISSUED ON: SEPTEMBER 1, 2021
IMPLEMENTED ON: OCTOBER 1, 2021
China Quality Certification Center
Table of Contents
Foreword ... 3
1. Scope of application ... 5
2. Certification mode ... 6
3. Certification application ... 6
4. Type test ... 7
5. Evaluation and approval of certification results ... 10
6. After-certification supervision ... 11
7. Review ... 12
8. Certification certificate ... 12
9. Use of certification mark ... 14
10. Charge ... 15
1. Scope of application
This Rules applies to the CQC safety certification of copper conductor terminal
blocks in auxiliary devices of low-voltage switchgear and control equipment,
including:
1) Industrial or similar screw-type or non-screw-type terminal blocks
mounted on brackets to provide electrical connections for copper
conductors and mechanical connections. These terminal blocks are used
in circuits with a rated voltage not exceeding 1000 V ac (1140 V), a
frequency up to 1000 Hz or 1500 V dc. They are used to connect terminal
blocks of round copper conductors with or without special processing with
a cross-sectional area of 0.2 mm2 ~ 300 mm2 (AWG24 ~ 600kcmil).
2) Protective conductor terminal blocks with screw or non-screw clamps for
industrial use. The terminal block with PE protection function shall not be
larger than 120 mm2 (250kcmil). The terminal block with PEN protection
function shall be greater than or equal to 10 mm2 (AWG8). Protective
conductor terminal blocks are used for electrical and mechanical
connection between copper conductors and mounting brackets. This
protective conductor terminal block is used in AC circuits with a voltage
not exceeding 1000 V (1140 V)) and 1000 Hz as well as in DC circuits with
a voltage not exceeding 1500 V. They are used to connect protective
conductor terminal blocks of prefabricated or non-prefabricated round
copper conductors with a cross-sectional area of 0.2 mm2 ~ 120 mm2
(AWG24 ~ 250kcmil).
3) Fuse terminal blocks with screw or non-screw clamps for connection to
solid copper conductors (single core or strands) or soft copper conductors.
This fuse terminal block carries or uses the tubular fuse described in GB/T
9364.2. It is mainly used in industrial or similar circuits with AC not
exceeding 1000V, frequency up to 1000Hz or DC not exceeding 1500V,
maximum short-circuit breaking capacity of 1500A. The fuse terminal
block is installed in the electrical equipment with the housing. There shall
be a space around the terminal block and the housing where the terminal
block can be accessed with the help of tools. In some occasions, such as
in control circuits, the fuse terminal block can be designed specifically for
short-circuit protection.
4) Printed circuit board terminal blocks for industrial or similar purposes
(hereinafter referred to as PCB terminal blocks). They are mounted and
fixed on the printed circuit board by soldering, pressing in or equivalent
methods, so as to provide electrical and mechanical connections between
copper conductors and printed circuit boards. This PCB terminal block is
3.2.2 Proof materials
a. Certificate of registration of applicant, manufacturer, production factory,
such as business license, organization code (when applying for the first
time).
b. If the applicant is a seller or an importer, it is also necessary to submit a
copy of the relevant contract between the seller and the producer, and the
importer and the producer.
c. Agent?€?s power of attorney (if any).
d. Effective supervision inspection report or factory inspection report (if any).
e. For application for change, the supporting documents of the relevant
change items.
f. Other required documents.
4. Type test
4.1 Samples
4.1.1 Sample sending principle
CQC selects representative samples from the application certification unit.
The specification ranges of the same series of samples are 0.05~1mm2,
1.5~6mm2, 10~50mm2, 70~150mm2, 185~300mm2.
In principle, the specimen size of each size range segment is the smallest size
among 0.05~1mm2 and 1.5~6mm2 as the specimen. Among the 10~50mm2,
70~150mm2, and 185~300mm2, the largest size is used as the specimen. At
the same time, the specimens in one application unit must include the maximum
size and the minimum size.
4.1.2 Quantity of samples
The applicant is responsible for sending samples to the designated testing
agency. The sample quantities are as follows:
For screw terminal blocks, 27 pieces shall be sent for each unit applying for
certification according to the specimen specifications within the specification
range specified in 4.1.1. Another 5 pieces of protective terminal blocks for
copper conductors shall be sent.
For non-screw terminal blocks, 32 pieces shall be sent for each unit applying
for certification according to the specimen specifications within the specification
range specified in 4.1.1. Another 5 pieces of protective terminal blocks for
copper conductors shall be sent.
For screw fuse terminal blocks, 35 pieces shall be sent for each unit applying
for certification according to the specimen specifications within the specification
range specified in 4.1.1. For non-screw type fuse terminal blocks, 40 pieces
shall be sent for each unit applying for certification according to the specimen
specifications within the specification range specified in 4.1.1.
For screw and non-screw PCB terminal blocks, 27 pieces shall be sent for each
unit applying for certification according to the specification range specified in
4.1.1.
4.1.3 Disposal of samples and materials
After the test is completed and the test report is issued, the relevant materials
are kept by the testing agency, and the samples are disposed of in accordance
with the relevant CQC regulations.
4.2 Type test
4.2.1 Standards
GB/T 14048.7-2016, "Low-voltage switchgear and control gear - Part 7-1:
Ancillary equipment - Terminal blocks for copper conductors"
GB/T 14048.8-2016, "Low-voltage switchgear and control gear - Part 7-2:
Ancillary equipment - Protective conductor terminal blocks for copper
conductors"
GB/T 14048.18-2016, "Low-voltage switchgear and control gear - Part 7-3:
Ancillary equipment - Safety requirements for fuse terminal blocks"
GB/T 14048.22-2017, "Low-voltage switchgear and control gear - Part 7-4:
Ancillary equipment - PCB terminal blocks for copper conductors"
4.2.2 Test items and requirements
All item indicators of terminal blocks shall meet the requirements in GB/T
14048.7-2016, GB/T 14048.8-2016, GB/T 14048.18-2016, GB/T 14048.22-
2017.
Type test items are all applicable items in Table 1.
If the fuses used in the fuse terminal blocks do not have CCC or CQC
certification, they need to be randomly tested according to GB/T 9364.2.
CQC organizes a comprehensive evaluation of the results of type test and
factory inspection. After passing the evaluation, the applicant is issued a
product certification certificate, and a certificate is issued for each certification
unit.
5.2 Time limit of certification
After the completion of type test, the applicant shall be issued a certification
certificate within 15 days if it meets the certification requirements.
6. After-certification supervision
6.1 Supervision-inspection time
6.1.1 Frequency of certification supervision-inspection
Generally, the first follow-up inspection shall be arranged within 3 months after
the enterprise obtains the certificate. In case of special circumstances, it needs
to be approved by CQC, no later than 6 months. The interval between each
annual supervision-inspection shall not exceed 12 months. Increase the
frequency of supervision if one of the following occurs:
1) The certified product has serious quality problems or the user has
submitted a serious complaint, which have been verified that it is the
responsibility of the certificate holder;
2) When CQC has sufficient reasons to question the compliance of the
certified product with the certification standards;
3) When there is sufficient information to indicate that the conformity or
consistency of the product may be affected by changes in the organization,
production conditions, quality management system, etc. of the producer
or production factory.
6.1.2 Number of man-days of supervision-inspection
The number of man-days for factory supervision-inspection is generally 1 man-
day.
6.2 Contents of supervision-inspection
The method of after-certification supervision-inspection adopts the supervision-
inspection of factory product quality assurance ability + consistency inspection
of certified products. CQC supervises and inspects the factory according to
CQC/F 001-2009 "CQC Mark Certification Factory Quality Assurance Ability
Requirements". All articles are mandatory items for the first supervision. From
the second supervision, articles 3, 4, 5, and 9 are mandatory items for each
supervision-inspection, and other items are optional. It shall cover all the
provisions specified in CQC/F 001-2009 at least every 4 years.
The contents of the consistency inspection of certified products is basically the
same as the contents of the product consistency inspection during the initial
factory inspection.
Check the product quality inspection in accordance with Annex 2 ?€?Factory
quality control testing requirements for certification of terminal blocks?€?.
6.3 Conclusion of supervision-inspection
The inspection team is responsible for reporting the conclusion of the
supervision-inspection. If the conclusion of the supervision-inspection is Not-
PASS, the inspection team shall report directly to CQC. If there are non-
conformities in the supervision-inspection, the factory shall complete the
rectification within the specified period, and CQC shall take appropriate
measures to verify the results of the rectification. If the rectification fails to be
completed on time or is Not-Pass, the supervision-inspection will fail.
6.5 Evaluation of results
CQC organizes a comprehensive evaluation of conclusion of supervision-
inspection. If the evaluation is qualified, the certification certificate will continue
to be valid. If the supervision-inspection fails or there is serious non-compliance,
it shall be implemented in accordance with the provisions of 8.3.
7. Review
For a certificate whose status is normal, the enterprise shall apply for review 6
months before the expiration date. If there are effective annual supervision-
inspection results and effective product type test reports, the certificate can be
renewed by changing the mode. If there is no valid annual supervision-
inspection result and valid product type test report, the task of product testing
will be issued and arrange all-factor factory inspection. For certificates whose
status is suspended, they shall be restored to normal or carried out at the same
time as the review. Review applications cannot be made for canceled and
revoked certificates.
8. Certification certificate
8.1 Maintenance of certification certificate
8.1.1 Validity of certificate
the requirements of Clause 4 of this Rules.
8.3 Suspension, resumption, cancellation and withdrawal of certification
certificate
The use of certificates shall comply with the requirements of the related
certificate management regulations of CQC. When the certificate holder
violates the relevant provisions of the certification or the certified product fails
to meet the certification requirements, CQC will suspend, cancel and withdraw
the certification certificate accordingly, and announce the results. Certificate
holders can apply to CQC to suspend or cancel their certification certificates.
During the suspension of the certificate, if the certificate holder needs to resume
the certification certificate, he shall apply to CQC for resumption within the
specified suspension period, and CQC will resume it in accordance with
relevant regulations. Otherwise, CQC will cancel or withdraw the suspended
certification.
9. Use of certification mark
9.1 Mark style permitted to use
The certified products are allowed to use the following certification mark:
If the certified product needs to use the certification mark of 10mm and smaller
size, it is allowed to use the deformed mark ( or ).
9.2 Application of certification mark
If the mark is applied, the certificate holder shall use the certification mark in
accordance with the provisions of the "General Requirements for Product
Certification Logos (Marks)". Reasonably choose the type of mark according to
the characteristics and usage of the product. If the standard specification mark
is used, it shall be applied at a prominent position on the body of the certified
product. If a printed or molded mark is used, it shall be placed on a prominent
position on the nameplate or body of the certified product. If the main body
cannot be applied with a mark, the mark shall be applied to the minimum
packaging and accompanying documents of the product.