Some standard content:
G17936—1999
This standard adopts the International Electrotechnical Commission IEC 61184:1997 Bayonet Lamp Holder (2nd Edition). Its technical content and writing format are completely consistent with IEC61184:1997.
This standard specifies and explains the safety requirements and inspection methods of bayonet lamp holders in detail. The adoption of international standards can quickly improve the quality of bayonet lamp holders in my country, meet and promote the needs of international trade technology and economic exchanges and international quality certification as soon as possible, improve and enhance the quality of bayonet lamp holders in my country, and standardize the bayonet lamp holder market. This standard is a mandatory national standard.
From the date of implementation of this standard, the original QB2429—1999 will be abolished. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the State Bureau of Light Industry.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Lighting Appliances, Electric Light Sources and Their Accessories Standardization Sub-Technical Committee. The drafting unit of this standard: Beijing Electric Light Source Research Institute. Drafters of this standard: Gao Nong, Wang Zhijun.
comGB17936—1999
IEC Foreword
1 International Electrotechnical Commission IEC is a worldwide standardization organization, composed of IEC International Committees of Electrotechnical Technical Committees of each member country. The goal of IEC is to promote international cooperation on all aspects of standardization in the field of electrical and electronic technology. Therefore, IEC publishes various international standards. The drafting of these standards is the responsibility of each technical committee. If the member countries of IEC are interested in the content involved in the standards, they can also participate in the drafting work. International organizations, governments and non-governmental organizations that have established relations with IEC can participate in the drafting work. IEC and the International Organization for Standardization (ISO) have mutual agreements to cooperate closely. 2) In view of the fact that each technical committee has representatives of the member country committees, IEC's formal decisions or agreements on technical issues have expressed the international consensus on the corresponding issues as much as possible. 3) Recommended standards, reports or guidelines published for international use are, in a sense, adopted by the national committees. 4) In order to promote international unification, IEC member countries shall ensure that IEC International Standards are used to the greatest extent possible in their national and regional standards. Any differences between IEC standards and national or regional standards shall be clearly stated in the latter. 5) IEC does not provide any certification mark and is not responsible for any product claiming to conform to IEC standards. 6) Some of the contents of this international standard may involve patent rights. IEC is not responsible for the determination and confirmation of all such patent rights. This international standard was drafted by Sub-Committee 34B, which is responsible for lamp caps and lampholders within IEC Technical Committee 34 for "Lamps and Related Equipment". This standard is based on its first edition, first revision, second revision and the following documents: Draft Standard No.
34/B661/FD1S
Voting Report No.
34B/728/RVD
Details of the voting for this standard can be found in the voting report shown in the table above. Annex A is an integral part of this standard.
1 General
1.1 Specification
National Standard of the People's Republic of Chinawww.bzxz.net
Bayonet lampholders
G 17936—1999
Idt IEC 61184: 1997
This standard applies to B15d and B22d bayonet lampholders for connecting lamps and semi-luminaires to a supply voltage rated at 250 V. This standard also applies to lampholders which are fully or partially integrated with luminaires or which are intended to be installed in equipment. Free-standing lampholders not specifically intended for recessed installation, such as flush-mount lampholders, shall also apply the additional requirements described in Chapter 3. NOTE: The maximum operating voltage of lampholders intended for use in luminaires is given in GB 7000.1. B15, B22 represent the lamp cap/lampholder matching system determined by the types and dimensions of GB1407 and QB 3588 and the corresponding gauges. 1.2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and the parties using this standard should explore the possibility of using the latest versions of the following standards. GB1407-1996 Types and dimensions of bayonet lamp holders (eqvIEC60061-1Q:1994) Test Eg: impact, spring hammer
GB/T2423.44-1995 Environmental testing for electric and electronic products Part 2: Test methods (eqvIEC60068-2-63:1991)
GB/T 2423.46-1997 Environmental testing for electric and electronic products Part 2: Test methods Test Ef: impact hammer (idt IEC 60068-2-62.1991)
GB/T 4207-1984 Test method for comparative leakage thinning index and resistance to leakage tracking index of solid insulating materials under humid conditions (neq IEC 60112:1979)
GB4208-1993 Degrees of protection provided by enclosures (IP code) (eqyIEC60529:1989)GB/T4687—1984 Terminology for paper, paperboard and pulp - Part 1 (neqISO4046:1978)GB5013-1997 Rubber insulated cables with rated voltages up to and including 450/750V (idtIEC60245)GB5023—1997 Vinyl fluoride insulated cables with rated voltages up to and including 450/750V (idtIFC60227)Fire hazard testing for electrical and electronic products - Part 2: Test methods - Part 2 - Needle roasting testGB/T 5169.5—1997
(idtIEC 60695-2-2:1991)
General principles for glow-wire test methods
GB/T 5169.10—1997
Test methods for fire hazard testing of electric and electronic products (idt IEC 60695-2-1/0,1994)
GB/T 5169.11—1997
Test methods for fire hazard testing of electric and electronic products - Glow-wire test and guidance for finished products
(idt IEC 60695-2-1/1;1994)
Graphical symbols for electrical equipment (idtIEC60417:1994)GB/T 5465.2--1996
GB7000.1—1996 Luminaires—General safety requirements and tests (idtIEC 60598-1:1992) GB10681—1989 Ordinary lighting bulbs
GB14196—1993 Safety requirements for ordinary lighting bulbs (eqv[EC 60432:1984) GB/T16935.11997 Insulation matching for low voltage systems Part 1: Principles, requirements and tests (idt IEC 60664-1:1992)
State Administration of Quality and Technical Supervision 1999-12-30 Approved 2000-08-01 Implementation
GB 17936— 1999
GB179351999Climbing lamp holder (idtIEC602381996)QB3588—1999Types and dimensions of socket lamp holdersQB/T3589-1999Inspection plate specification for socket lamp holdersIEC60399:1972Lampshade fastening ring thread dimensions for E14 and E27 lamp holders2Definition
This standard adopts the following definitions.
Note: For the definition of typical components, see Figure 4.
2.1Material
2.1.1Plastic lamp holderplastic lamp holder A lamp holder whose shell is made entirely of plastic material. Note: The shell of the lamp holder refers to all parts that are directly in contact with the test finger shown in GB 4208 when the lamp holder is connected to the electrocoagulation wire and installed with the test device shown in Figure 7.
2.1.2 Ceramic lampholder
Ceramic lampholder
A lamp holder whose shell is completely made of ceramic material (see the note in 2.1.1). 2.1.3 Metal lampholder A lamp holder whose shell is made entirely or partially of gold (see the note in 2.1.1). 2.2 Means of fixing
2.2.1 Cord grip lampholder A lamp holder equipped with a flexible wire that can be fixed and can be suspended by a flexible wire (see Figure 4a). 2.2.2 Threaded entry lampholder A lampholder with a threaded part at the entrance of the lampholder power cord so that it can be attached to a lampholder with a matching thread (formerly called a threaded tube lampholder) (see Figure 4b).
2.2,3 Backplate lampholder A lampholder that can be directly mounted on a supporting surface or a suitable housing through a combined base or an integral base. 2.3 Terminal/contact assembly A component or assembly that contacts the terminal of the power cord with the contact of the lamp holder, which is elastic to maintain contact pressure. a) Movable: When the lamp holder is inserted into the lampholder, the terminal can be raised parallel to the axis of the lamp, b) Fixed: When the lamp holder is inserted into the lampholder, the terminal cannot be raised. Note: The terminal extension and the outer bright can be the same component. 2.4 Union ring
A round and simple component that can connect the lamp holder to an external separate component. 2.5 shadering
A circular component with internal grooves or other devices that can engage with corresponding supporting parts on the outside of the lamp holder and is used to fix the lampshade. 2.6 skirt
(for plastic lamp holders only) A simple component similar to the shade ring but longer than the total length of the lamp holder body. 2.6.1 pratective shield (for plastic lamp holders only) A component similar to the skirt but with a trumpet-shaped end that flares outwards to prevent the user from accidentally contacting the lamp cap.
2.7 dome
A component used to protect the terminal on a suspended lamp holder or a tube-connected lamp holder. 2.B barrel
A component used to achieve the mechanical connection between the lamp cap and the lamp holder. GB 17936— 1999
2.9 Built-in lampholder for building-in Lampholder installed in auxiliary housing or similar device of lamp. 2.9.1 Unclosed lampholder A built-in lampholder that needs to be equipped with additional devices (such as external lighting) to meet the protection against electric shock requirements of this standard. 2.9.2 Enclased lampholder A built-in lampholder that meets the protection against electric shock requirements of this standard and the corresponding housing protection requirements. 2.10 Independent lampholder A lampholder that can be installed outside the lamp independently and can provide all protective measures consistent with its classification and marking. 2.11 Switched lampholder A lampholder equipped with a power switch.
2.12 Basic insulation Besic insulation Insulation measures taken for live parts to prevent electric shock. Note: Basic insulation does not necessarily include insulation specially adopted to ensure the protective function. 2.13 Supplementary insulation Another independent insulation outside the basic insulation is adopted to ensure that electric shock can be prevented in the event of failure of basic insulation. 2.14 Double insulation Dauble insulation An insulation measure composed of basic insulation and supplementary insulation. 2.15 Reinforced insulation A single insulation system adopted for live parts, which provides the same level of protection against electric shock as double insulation under specific conditions. Note: The term "insulation system" does not mean that the insulator must be a single material. It can be composed of several layers of materials that cannot be tested for additional insulation or basic insulation separately.
G Live part
Conductive part that may cause electric shock during normal use. Conductors used as "neutral" wires should be regarded as live parts. Appendix A of GB7000.1-1996 gives the test method for determining whether a conductive part is a live part that may cause electric shock.
2.17 Type test type test
One or a series of tests carried out on a type test sample in order to verify that the design of a given product complies with the requirements of the relevant standard.
2.18 Type test sample type test sample A number of similar samples provided by the manufacturer or distributor for the purpose of type testing. 2.19 Semi-luminaire
A device similar to a self-ballasted lamp but capable of using a replaceable light source and/or starter. 2.20 Rated operating temperature ratedoperatingtemperature The maximum temperature specified for the design of the lamp holder.
2.21 Rated pulse voltage ratedpulsevoltage The single maximum value of the pulse voltage that the lamp holder can withstand. 3 General requirements
The design and construction of the lamp holder shall be such that the lamp holder performs reliably in normal use and is not dangerous to the user and the surrounding environment. Compliance is verified by carrying out all the specified tests. The non-interior independent lamp holder shall meet the requirements of the following clauses of GB7000.1, which are not listed in this standard: Chapter 2 Classification
Chapter 3 Marking +
Chapter 4 Structure;
Chapter 8 Anti-electric shock performance:
Chapter 9 Dust and moisture resistance;
GB 179361999
Chapter 10 Insulation resistance and dielectric strength (for Class II lamps) + 12.4 and 12.5 thermal tests,
4 General test requirements
4.1 The tests described in this standard are all type tests Note: The safety requirements and dimensional tolerances specified in this standard are used for the inspection of type test samples. The qualified inspection of type test samples does not guarantee that all products of the manufacturer meet this safety requirement. In addition to the type test, the manufacturer should ensure that the product has good consistency (including safety inspection and quality inspection). 4.2 Unless otherwise specified, the test samples of lampholders shall be provided and installed as required for proper use and tested without lamps at an ambient temperature of 20°C ± 6°C.
4.3 The total number of test samples is as follows:
Non-switching lampholders: 8 samples
Switching lampholders: 11 samples.
The inspection and testing shall be carried out in the order of the following chapters: 3 samples for the tests described in Chapters 3 to 12; 3 samples for the tests described in Chapters 14 to 18; 1 - 3 samples for the tests described in Chapter 13 (for switching lampholders only); 2 samples for the tests described in Chapters 19 and 20. Note: When the requirements of 10.2 are met for screwless terminals, additional test samples are required. This clause is also necessary for independent lampholders that are not built-in (see Chapter 3). 4.4 If the samples of the basic type lampholder pass all the tests specified in 4.3, the lampholder of this type is considered to comply with this standard. If one lampholder from a group fails during the whole series of tests specified in 4.3, the lampholders of that type shall be deemed to fail unless the lampholders tested show that they are not representative of normal production and design characteristics, in which case another group shall be submitted for testing, with only the test that failed to be passed being repeated for this group. However, if lampholders fail in any of the tests specified in clauses 14 to 18, the tests shall be repeated starting with the test specified in clause 14. If there are still lampholders that fail to pass the tests, additional type-test samples may be submitted together with the first group of type-test samples. In this case, if further failures occur, these additional type-test samples shall be deemed to fail. If no failures occur in this repetition, the lampholders of that type shall be deemed to comply with this standard. If no additional type-test samples are submitted, the failure of one lampholder sample shall constitute the failure of the whole group. If more than one lampholder fails during the whole series of tests specified in 4.3, the lampholders of that type shall be deemed not to comply with this standard.
NOTE: The duration of the test may be verified by a single series of type tests for lampholders which differ only in details and have the same construction and materials, but this must be agreed upon by the applicant for the test and the inspection body. 5 Standard rated values
5.1 Standard rated voltage
For all lampholders, the rated voltage is 250 . B15d lampholders shall not be used in circuits with ignitors. B22d lampholders shall not be used in circuits with ignitors without the approval of the lampholder manufacturer. NOTE: The minimum creepage distance required for a B22d lampholder would theoretically result in a creepage distance sufficient to withstand a 2,5 kV impulse voltage. :comGB 179361999
When making the measurement, the contacts shall be gently moved and the bulb shall be pulled out. In some cases, this may reduce the gap. This reduced gap will not affect the normal operation of the lamp holder (without trigger) only when the creepage distance is at a critical value. BY22d lamp holder is specially used in circuits with triggers. 5.2 Standard rated current
B15 lamp holder: 2A1
——B22 lamp holder, 2A.
The current shall not be less than the standard rated value.
Check whether the lamp holder complies with the requirements of 5.1 and 5.2 by observing the markings on the lamp holder. Classification
Lamp holders are classified as follows:
6.1 According to the material of external parts, they are divided into:
Lamp holders whose external parts are all made of plastic; - Lamp holders whose external parts are all made of ceramic materials; - Lamp holders whose external parts are all or partly made of metal. NOTE: For the definition of "external bright", see the note to 2.1.1. Lampholders whose external parts are partly made of metal, and lampholders whose external parts are made of insulating material but whose outer surface has a conductive outer layer (such as a gold-coated shell) are considered to be metal lampholders. This classification does not apply to threaded nozzles and external parts that will not be live even in the event of an interrupting fault, such as a metal lampshade ring mounted on the outside of an insulating material lampholder. Metal lampholders with an insulating layer should be considered to be metal lampholders. To check whether the surface of the lampholder is conductive, the following method can be used to check: two strip electrodes 25 mm long and 1.5 mm wide are placed in contact with the surface of the lampholder (such as a surface with a silver conductive coating), and the two electrodes are 2 mm apart, and then the insulation resistance of the two strip electrodes is measured in accordance with 14.3. If the resistance is less than 5M2, the surface is considered to be conductive. 6. 2 According to the level of protection against solid objects and water, it is divided into ordinary lamp holders:
anti-drip lamp holders.
Note: the classification method for higher water resistance levels is still under development. 6.3 According to the installation method, it is divided into:
pipe-connected lamp holder:
a suspension lamp holder;
flat-mounted lamp holder,
a one-other lamp holder.
Forward: Other lamp holders can be lamp holders equipped with mechanical suspension devices, such as hanging positions, 5.4 According to the type, it is divided into:
a switch lamp holder, which is equipped with a switch to control the power supply of the lamp: a non-switch lamp holder.
6.5 According to the anti-electric shock performance, it is divided into:
enclosed lamp holder,
scattered lamp holder:
independent lamp holder.
6.6 According to heat resistance, it is divided into:
without temperature mark T B15d lamp holder with a rated operating temperature of 135°C and B22d lamp holder with a rated operating temperature of 165°C.
GB 179361999
B15d lamp holder with a rated operating temperature of not less than 140°C and B22d lamp holder with a rated operating temperature of not less than 170°C with temperature mark T×××, these rated operating temperatures are marked or announced by the manufacturer. Note 1, the marked temperature value should be carried out in steps of 10°C. - Lamp holder with temperature mark T1, suitable for lamp holders with a temperature of 165°C: 2: Lamp holder with temperature mark T1 should be rechecked when it is used continuously, lamp holder with temperature mark T2, suitable for lamp holders with a temperature of 210°C. 7 Marking
7. 1 The lamp holder shall be marked with the following markings:
rated voltage, in V
rated operating temperature, in T×××, T1 or T2, whichever is applicable (see 6.6). In the first form of marking, the letter T shall be followed by the Celsius value of the rated operating temperature. - mark the power category symbol when necessary (only for switch-type lamp holders); for lamp holders whose housing is made entirely of ceramic material, the appropriate rated operating temperature shall be marked on the lamp holder or indicated in the manufacturer's product manual;
- source mark (which may be in the form of a trademark, manufacturer's or seller's name identification mark, etc.); - unique product sample number or identification mark; Note: The identification mark may include letters, letters, colors, etc., to identify the lamp holder involved in the manufacturer's or seller's product sample or similar literature. When the current is greater than 2A, the rated current in A shall be marked; for non-ordinary lamp holders, the waterproof grade number TP shall be marked (see 6.2). For single-pole switch-type lamp holders, the pole to be disconnected shall be marked. 7.2 If symbols are used to indicate current and voltage, A indicates current and V indicates voltage. Alternatively, the symbols may be used to indicate current and voltage alone, i.e. the digits indicating the rated current are marked before or above the digits indicating the rated voltage and separated by a short straight line or slash. Thus, the markings for current and voltage may be expressed in the following form: 4A250V or 4/250 or 250
The symbol for direct current is: --
The symbol for waterproof grade of drip-proof lamp holder is IP×1. (See GB/T5465.2)
Note: The × in the IP number indicates a missing digit. Two appropriate digits shall be marked on the lamp holder in accordance with GB 4208. 7.3 The waterproof grade mark shall be marked on the outer surface of the lamp holder. 7.4 The grounding terminal shall be indicated by the symbol ) (See GB/T 5465.2). This symbol shall not be marked on screws, movable washers or other movable parts.
Qualification shall be checked by visual inspection.
7.5 Where the cross-sectional area requirements of the terminal block specified in 10.2 are not met, the relevant value or range of values shall be marked in mm followed by a small square (e.g. 0.5 mm). Such marking is not required for discrete lampholders, but the manufacturer's installation instructions shall provide a corresponding description. 7.6 The marking shall be durable and easily identifiable. The requirements of 7.1 to 7.5 shall be verified by visual inspection and by the following test: first, the mark shall be gently wiped with a cloth soaked in water for 15 s, and then with a cloth soaked in gasoline for 15 s. After this test, the mark shall still be clearly identifiable. The flooding oil used mainly contains hexane solvent, which contains a maximum volume percentage of 0.1% aromatic ring diameter, with a solubility of 29, an initial boiling point of 65°C, a dry point of about 69°C, and a density of about 0.68 g/cm. 8 Dimensions
B.1 The dimensions of the lampholder shall comply with the requirements of GB/T3588-1999 and GB 17936-1999. Compliance shall be checked by measurement and by the use of the gauges specified in GB/T3589-1999. Lampholders designed for use with shade supports shall comply with the dimensional requirements shown in Figure 8 and shall also comply with the corresponding requirements of IEC60399. Compliance shall be checked by inspection.
8.2 The threaded inlet of the lampholder shall have the following thread conforming to the requirements of Figure 13 - B15 lampholder: M10×1
B22 lampholder: M10×1 or M13X1.
Note 1: The M10X1 threaded inlet is mainly used for internal connections of luminaires. Compliance is checked by the gauge shown in Figure 14. In case of doubt, the gauge may be applied to the threaded inlet with a torque of 0.5 N·m. 2: Other thread sizes Lampholders are for lampholders not intended for retail sale only. 8.3 The dimensions of the threaded openings and set screws shall not be less than those given in Table 1. Table 1
Nominal thread diameter
Length of threaded opening
Metal openings
—insulating material openings
Diameter of set screws
Head screws
Headless screws
M13×1
A tolerance of 0,15 mm is permitted for the nominal thread diameter. Compliance is checked by measurement. NOTE Compliance with 8.2 and 8.3 may require the lampholder to be disassembled and tested after the tests of Clause 12 have been completed. 9 Protection against electric shock
9.1 The design of the lampholder shall be such that when the test apparatus shown in Figure 7 is mounted on the fully assembled lampholder, live parts of the lampholder shall not be easily accessible to persons.
Note: A protective cover or shield may be used, see 2.6 and 2.6.1, as shown in Figure 9. For free-standing lampholders and enclosed lampholders, compliance shall be checked using a standard test finger in accordance with GB 4208. During the test, the test finger is touched to each possible position of the lampholder with a force not exceeding 10 N, and an electrical indicator is used to show whether live parts are touched. It is recommended that the voltage used should not be less than 40 V. Free-standing lampholders and enclosed lampholders shall be installed as in normal use, such as on a threaded bracket or a supporting surface or the like. Open lampholders may only be tested after being installed in a luminaire or other auxiliary housing, and therefore such lampholders shall not be zero. 9.2 The structure of the lampholder shall ensure that in normal use, before and after the bulb is inserted into the lampholder,No metal parts other than the terminals and contact devices shall be live. Compliance is checked by inspection.
9.3 Parts of the lampholder which prevent accidental contact between persons and live parts shall, when properly assembled, have sufficient mechanical strength to withstand the forces generated when removing and installing the power supply. Such parts shall also withstand the normal stresses which occur when fitting the corresponding standard bulb and a suitable lampshade. When the lampholder is fitted with a corresponding standard push lamp, lampshade or similar part, the bulb, lampshade etc. may be removed with a moderate force consistent with normal use without removing the parts of the lampholder which prevent accidental contact between persons and live parts. Compliance is checked by inspection and by the test of 15.3, which shall be carried out after the test of 18.1. 9.4 External parts of dripproof lampholders shall be of insulating material, except for their threaded entries and the lampshade ring, which shall not become live in the event of a leakage current: Paint or enamel shall not provide adequate protection against electric shock. Compliance is checked by inspection. GE 17936-1999 Parts separated from live parts by double insulation or reinforced insulation are considered to be parts which will not become live in the event of a leakage current. 10 Terminals 10.1 The lampholder shall be fitted with at least one of the following types of connection: a screw-type terminal; a screwless terminal; a push-on connection piece or a connection plug.
- a wire wrap terminal:
- a soldering lug;
: a connecting lead (not a rewiring lead). Compliance is checked by daylight.
10.2 Terminals shall be capable of receiving conductors of the nominal cross-sectional area in the lower part, unless otherwise specified in the manufacturer's installation instructions or otherwise marked on the lampholder (see 7.5):
- for B15d and B22d lampholders with M10×1 threaded entry and lampholders with wire clamping device: 0.5 mm to 1.0 mm2
- for other B22d lampholders: 0.5 mm to 2.5 mm. Compliance is checked by inspection, by the reception of conductors of the minimum and maximum cross-sectional areas specified, and by the tests specified in clause 16. For pendant lampholders and lampholders with M10×1 threaded entry, cantilever conductors are used; in all other cases, the conductors are solid. Pipe-type lampholders are tested on a threaded conduit. 10.3 The terminals shall be threaded or their connection method shall be at least equivalent. Threaded terminals shall have ISO (metric) threads or threads similar in pitch and mechanical strength and shall otherwise comply with the requirements of Chapter 14 of GB7000.1-1996. The dimensions of post terminals shall not be less than the values shown in Table 2. Table 2
Minimum nominal thread diameter
Note 1: The diameter of the wire penetration hole shall not be greater than 0.6 mm greater than the screw diameter. Minimum diameter of wire penetration
The length of the thread on the terminal screw shall not be less than the sum of the wire penetration diameter and the length of the terminal post thread. mm
Note 2: In order to minimize damage to the wire, the end of the screw shall be slightly chamfered and the inner wall of the wire penetration hole (where the screw is stuck to the guide wool) shall not be damaged.
When screwless terminals comply with the requirements of Chapter 15 of GB7000.1-1996, they shall be considered equivalent to threaded terminals. The terminals on lamp holders shall be capable of receiving both rigid (solid or stranded) conductors and flexible cords. Lamp holders sold to manufacturers of lamps or other equipment are excluded.
Compliance shall be checked by inspection or measurement. 10.4 The terminals shall be positioned so that there is no risk of accidental contact between live parts and metal parts that are easily touched by people or moving parts of switches after the conductors are correctly installed and before, during and after the operation of the lamp holder. Compliance shall be checked by inspection and by the following test: Remove 4 mm of the insulation from the end of a flexible conductor with the minimum nominal cross-sectional area specified in 10.2, leave one conductor from the stranded conductor, and insert all the remaining conductors into the lamp holder's terminals and tighten (for example, tighten the locking screw) as in normal use.
The conductor left out shall be free to bend in every possible direction without abrasion of the insulation and no sharp bends shall be permitted when bending around the partition.
GB17936—1999
When a stranded conductor is attached to a live terminal, the left out conductor shall not come into contact with any accessible metal part or moving part of a switch; when a stranded conductor is attached to an earthed terminal, the left out conductor shall not come into contact with any live part.
If necessary, the test may be repeated with this conductor on another test. NOTE Prohibition of sharp bends in the left out conductor when bending around the partition does not mean that the conductor remains straight during the test. Furthermore, such sharp bends may be permitted if they are considered reasonable to occur during normal assembly of the lampholder. 10.5 The requirements of clause 10.3 do not apply to lampholders which are installed in luminaires and are provided with connecting leads (not rewiring leads), lugs or equivalent devices.
Connecting leads (not rewiring leads) shall be connected to the lampholder by welding, fusion, crimping or other equivalent means. Leads shall be insulated conductors.
The mechanical and electrical properties of the insulation of the leads shall comply with the requirements of GB 5023 or GB 5013, or comply with the requirements of 5.3 of GB 7000.1-1996. The insulation of the free end of the lead may be stripped. After the leads are connected to the lampholder, they shall withstand the mechanical forces that may occur in normal use. Compliance is checked by inspection and by the following test, which is carried out on the same three samples that have been tested in 18.2: A pulling force of 20 N is applied to each connecting lead in the most unfavorable direction for 1 min. The pulling force shall not be excessively twisted. During this test, the leads shall not move from their fixings. After the test, the lampholder shall not show any damage mentioned in this standard. 11 Grounding provisions
11.1 If a lampholder is to be earthed, the earthing means used shall not affect the electrical clearances and creepage distances of the lampholder and the proper functioning of the lampholder. For metal lampholders, the earthing terminal or other earthing means shall maintain good electrical contact with all exposed non-current-carrying metal parts. Metal parts securing the conductors, including fixing screws, shall be insulated from the earthing circuit. Compliance is checked by inspection.
11.2 Earthing terminals shall comply with Clause 10. The fixing means for earthing terminals shall ensure that screw-type terminals cannot be loosened without the use of a tool and that threadless terminals cannot be loosened by hand.
Compliance is checked by inspection and by the test described in Clause 10. Current-carrying terminals complying with this standard shall normally be sufficiently resilient to comply with the following requirements: For other terminals, special provisions may be made, such as parts which are sufficiently resilient and which will not accidentally move. 11.3 Pre-earthed metal lampholders shall be so designed that all external metal parts which may be touched can be electrically connected to the earthing terminal in the manner determined by the intended mounting method of the lampholder. This requirement may be achieved by the use of an earthing terminal, a separate earthing continuity conductor connection device. However, this does not preclude the use of other means of providing earthing continuity, such as threaded connectors, bases, lampshade rings or other means of connecting the lampholder to the earthed part of the luminaire.
NOTE 1: Lampholders intended for earthing but not provided with an earthing terminal or connecting lead shall not be sold for retail sale. Metal parts of lampholders not provided with an earthing terminal which may become live in the event of an insulation fault shall be securely and reliably earthed. Earthing continuity shall be maintained between the enclosure and the top cover unless the enclosure is separated from live parts by double insulation or reinforced insulation.
NOTE 2: For the purposes of this clause, insulated screws, etc., used to secure the base or enclosure shall not be considered as accessible parts which may become live in the event of an insulation fault.
Compliance is checked by the following test: For lampholders with earthing terminals, a rigid conductor of the smallest cross-sectional area specified for use is attached to the lampholder. Where it is necessary to check the earthing continuity between the housing and the dome, first tighten the two parts with a torque equal to the test value given in 15.3. Then carry out 14.3. The dielectric strength test is then immediately followed by measuring the resistance between the grounding device and the dome cover (housing). For lampholders with a grounding terminal, the measurement shall be made between the point where the wire is led out of the grounding terminal and the dome cover (housing). For lampholders without a grounding terminal, the measurement shall be made between the area to be grounded when the lampholder is installed in the luminaire and the dome cover (housing). A current of at least 10A is connected in sequence between the grounding terminal or grounding contact and each easily accessible metal part, which is provided by a power supply with a voltage of less than 12V.
Then the voltage drop between the grounding terminal or grounding contact and the easily accessible metal part is measured, and the resistance value is calculated based on the current and the voltage drop, which shall not exceed 0.1. 11.4 The metal used for the grounding terminal shall not be subject to the risk of rusting when in contact with the copper grounding conductor. The grounding terminal itself and the screws used shall be copper or other metal that is not inferior to copper in terms of corrosion resistance, and the contact surface shall be bare metal.
Compliance is checked by visual inspection.
Note: The risk of copper rusting in contact with the phase is the greatest 12 Structure
12.1 The surface of the contact should be smooth, and the shape of its reverse edge should not hinder the smooth insertion and removal of the corresponding lamp. The external dimensions of the contact should comply with the requirements of QB3588-1999. The relevant elastic device should be able to provide sufficient contact force. The contact force of each contact should comply with the requirements of Table 3. Table 3
Rated current
Minimum value
Qualification is checked visually and in accordance with QB 3588-1999. The contact force is checked using the QB/T3589-1999 gauge. This test should be repeated after the test described in 18.2 is completed. Contact force
Maximum value
12.2 The various parts of the lamp holder should be connected together safely and reliably. The fixture of the lampshade should be designed to ensure that the lamp holder will not be disassembled when the lampshade ring is rotated.
In pendant or pipe-type lampholders, if caps screwed directly onto the body of the lampholder, caps held in place by collars or other parts are used to prevent accidental contact with live parts, these parts shall be connected by at least one thread. Compliance is checked by inspection and by the test specified in 15.3 12.3 Where a threaded ring is specified, the outer surface of the ring shall be of a shape that facilitates manual turning. Compliance is checked by inspection.
12.4 If a collar is used, it shall be of a design that facilitates manual turning. The collar shall hold the parts of the lampholder in axial position and prevent relative rotation between them. Compliance is checked by daylight.
12.5 If the lampholder is fitted with a separate internal fitting for supporting current-carrying parts, the fitting shall not be capable of rotation relative to the other parts of the lampholder after being pinned in place.
Compliance is checked by visual inspection.
12.6 Adequate clearance shall be provided in the lampholder's dome for the supply wire. Parts of the lampholder that may come into contact with the insulated conductor shall not have sharp edges or angles that could damage the insulation of the conductor. Lampholders with dome-shaped tubes shall be provided with a device to prevent the conduit from entering too deeply into the lampholder's dome. This device may be a
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