GB 4706.47-1999 Safety of household and similar electrical appliances Particular requirements for electric heaters for animal breeding and feeding
Some standard content:
GB4706.47—1999
This standard is equivalent to IEC335-2-71:1993 Safety of household and similar electrical appliances Part 2, Particular requirements for heaters for animal breeding and feeding. This standard should be used in conjunction with GB4706.1-1998 General requirements for safety of household and similar electrical appliances.
The parts of this standard marked with "applicable" indicate that the corresponding provisions in GB4706.1-1998 are applicable to this standard; the parts of this standard marked with "replacement" or "modification" shall be subject to this standard; the parts of this standard marked with "addition" indicate that in addition to complying with the corresponding provisions in GB4706.1-1998, they shall also comply with the provisions added in this standard. This standard was proposed and managed by the National Technical Committee for the Promotion of Household Electrical Appliances Standardization. The main drafting unit of this standard: Guangzhou Daily Electrical Appliances Research Institute. The main drafters of this standard are Xu Yanrong and Zhang Huiru. This standard is entrusted to the National Technical Committee for the Standardization of Household Electrical Appliances for interpretation. GB 4706.47—1999
IEC Foreword
1) IEC (International Electrotechnical Commission) is an international standardization organization composed of all national electrotechnical committees (IEC National Committees). Its purpose is to promote international cooperation on standardization issues in the electrical and electronic fields. To this end, IEC, in addition to other activities, also publishes international standards. The formulation of these standards is entrusted to technical committees. Any IEC National Committee interested in the technical issue can participate in the formulation work. International, governmental and non-governmental organizations associated with IEC can participate in this work. IEC and the International Organization for Standardization (ISO) work closely on the basis of an agreement between the two organizations. 2) Formal resolutions or agreements on IEC technical issues formulated by technical committees in which all national committees with special interest in the issue participate, represent the international consensus on the issues involved as much as possible. 3) These formal resolutions or agreements are published in the form of standards, technical reports or guidelines, and are accepted by the national committees in this sense.
4) In order to achieve international uniformity, IEC National Committees shall use IEC International Standards to the greatest extent possible in their national and regional standards. Differences between IEC standards and corresponding national or regional standards shall be clearly indicated in the latter. 5) IEC has not established a procedure for the approval mark. IEC assumes no responsibility for any claim that a device complies with an IEC standard.
This standard was prepared by IEC Technical Committee 61 (Safety of Household and Similar Electrical Appliances) and Subcommittee 61H (Safety of Power-Driven Appliances for Farm Use).
This standard is the first edition of IEC 335-2-71.
This standard is based on the following documents:
Draft International Standard
61H (Central Office) 31
Voting Report
61H (Central Office) 37
For details of the voting on this standard, please refer to the report on the voting results listed in the table above. This standard should be used in conjunction with the latest version of LEC335-1 and its amendments. This standard is based on the third edition of IEC335-1 (1991).
This standard supplements or amends the corresponding provisions of IEC335-1 to transform it into the IEC standard: "Particular requirements for electric heaters for animal breeding and feeding".
Any specific provisions of IEC335-1 not mentioned in this standard shall apply as far as appropriate. Where "added", "modified" or "replaced" is indicated in this standard, the relevant text in IEC3351 shall be amended accordingly. Note that the additional provisions and figures based on IEC335-1 shall be numbered starting from 101. The following differences exist in some countries t
—6.1 Appliances intended for use on the floor are allowed to be Class I appliances (Australia)—21 Additional tests are required (Australia),—25.7 Ordinary PVC sheathed power cords are allowed (Australia). National Standard of the People's Republic of China
Safety of household and similar electrical appliances
Particular requirements
for electrical beating apps for breeding Bnd rearing animals1Scope
This chapter in GB 4706.1--1998 is replaced by the following content. GB 4706.47—1999
Idt IEC 335-2-71: 1993
This standard discusses the safety of various electric heaters used for animal breeding and rearing, such as radiators, chicken warming boxes, egg heaters, chicken rearing devices and animal heating panels. For single-phase electric heaters, the rated voltage should not exceed 250V, and for other electric heaters, the rated voltage should not exceed 480V. Notes
1 This standard applies to electric heaters equipped with motors and intended for animal breeding and feeding. 2 Attention!
For appliances used in vehicles, ships or aircraft, additional requirements are required. - For appliances used in belt areas, special requirements are required. - In many countries, additional requirements are stipulated by national public health departments, national labor insurance departments and national water supply departments and related departments. 3 This standard does not apply to
Appliances designed specifically for industrial use: appliances intended for use in special environments, such as those with corrosive or explosive gases (dust, steam or gas); - a booster device embedded in the floor,
- Lamellar heating weight 1
Room heater (IEC335-2-30).
2 Definitions
This chapter in GB 4706.1-1998 is applicable except for the following contents, replaced by 2.2.9:
Normal operation
The appliance operates in still air in the normal use state. 2.2.101 Heat-radiating appliance An electric heater that mainly transfers effective heat by radiation. Note: For this type of appliance, when it operates under normal working conditions and the temperature rise measured at the hottest point of its radiator does not exceed 95K, the appliance can only be considered as a heating plate for animals rather than a heat radiator. 2.2.102 Heating plate for animals Mainly refers to an electric heater that is intended to be fixed in an animal shed, on a chicken feeding device or pinned to the floor. Approved by the State Administration of Quality and Technical Supervision on November 11, 1999, and implemented on May 1, 2000
GB4706.47--1999
2.2-103 Electric sitting-hen for chicks refers to an appliance placed on the floor, with legs or hiding holes so that chicks can hide under it, and the chicks can take the heat from the top heating plate. 2.2.104 Chicken breeding units Chicken breeding units Appliances for raising chicks on the flat surface of stacked cages. Note: Usually a heating plate is installed above the chicks. 2.2.105 Incubator
An appliance designed for incubating eggs.
Note: The incubator is equipped with electric heating elements to warm the air and evaporate water vapor, ventilation to circulate the air, and electric motors to turn the eggs on the rack. 3 General requirements
This chapter in GB4706.1-1998 is applicable. 4 General conditions for testing
This chapter in GB4706.1-1998 is applicable except for the following contents. 4.2 Addition:
For portable radiators that are not normally used on the floor, two sets of suspension device samples should be provided in addition to the test of 22.104. 5 Blank chapter
6 Classification
This chapter in GB4706.1--1998 is applicable except for the following contents. 6.1 Replacement:
Appliances should be classified as Class I, Class I or Class II appliances according to the classification of protection against electric shock. Except for appliances intended to be embedded in the floor and permanently connected to the same circuit, appliances that are normally used on the floor should be Class I appliances and the rated voltage should not exceed 24V
Compliance is determined by visual inspection and relevant tests. 6.2 Replacement: Www.bzxZ.net
Electric heaters located on the ground during normal use or designed to work within 500mm (excluding 500mm) above the ground should be of IPX7 structure.
Other appliances should be of at least IPX4 structure. Compliance is determined by visual inspection and relevant tests. 7 Marking and instructions
This chapter in GB4706.1-1998 is applicable except for the following: 7.1 Addition:
Heat radiators should have the following markings:
Warning: Caution of fire
一 Heat radiators for animals;
The maximum rated power of replaceable radiators...W—The minimum distance between the radiator and the animal or flammable material in the radiation direction shall not be less than...ⅡⅡ; The appliance should be firmly fixed in place and: - The protective net cover shall not be removed;
一 The appliance shall not be covered.
Past intention!
The provisions of the instruction manual shall be observed.
GB 4706. 47—1999
Chicken rearing devices and chicken heaters shall bear the following markings: Attention!
The appliance shall not be covered.
Electric heaters for animals with a rated voltage not exceeding 24V shall bear the following markings: Electric heaters for animals.
Electric heaters for animals with a rated voltage exceeding 24V and fixed within 500mm of animals or flammable materials shall bear the following markings Electric heaters for animals:
The appliance shall be firmly fixed in place; the appliance shall be fixed at least mm away from animals or flammable materials. Attention!
The provisions of the instruction manual shall be observed.
7.12.1 Added:
The instruction manual should be included with the appliance and should at least include the following instructions: For a pair of heat radiators with replaceable radiators, the radiator model suitable for the appliance and the specified model must be used when replacing the radiator;
It should be clearly and easily understood that portable heat radiators that are not usually used on the floor should not be hung on the original window below the height marked on the appliance
For a pair of portable heat radiators that are not usually used on the floor, instructions on fixing the appliance by a hanging device should be provided; It should be clearly pointed out that the installation location of the heat radiator shall not be less than 500㎡m away from animals or flammable materials, or shall be greater than the distance specified by the manufacturer;
-Instructions on placing or protecting the power cord so that it does not come into contact with animals; -Detailed instructions for cleaning the appliance, which should specifically point out that the electric heating element or radiator should be kept free of dust or other unclean particles, and the appliance should be disconnected from the power supply when cleaning;
-Instructions on not using a damaged appliance: It should be pointed out that the appliance must be repaired by personnel with the corresponding professional qualifications. 7.14 Added:
The height of the mark added in 7.1 shall not be less than 5mm for the title;
3mm for other words.
8 Protection against touching live parts
This chapter in GB4706.1-1998 is applicable except for the following contents. 8.1 Added:
This requirement does not apply to live parts of threaded lamp (tube) holders or bayonet lamp (tube) holders installed in heat radiators. These live parts can only be touched after the radiator is removed. 9 Starting of electric appliances
This chapter in GB 4706.1-1998 is not applicable. 10 Input power and current
This chapter in GB 4706.1--1998 is applicable. 11 Heating
GB4706.471999
This chapter in GB 4706.1-1998 is applicable except for the following contents. 11.2 is added:
Portable radiant heat that is not normally used on the floor should be suspended freely in still air above a support made of plywood painted with matt black paint and 20 mm thick. The distance between the appliance and the support should be the distance marked on the appliance. Electric heaters for animals that are normally placed on the floor should be placed on a support made of plywood painted with matt black paint and 20 mm thick and completely covered with insulation material with a thermal resistance of 3.2 m*K/W. 11.B Table 3 is added:
According to the manufacturer's instructions, the surfaces of electric heaters that can be used less than 500 mm away from animals or flammable materials: all surfaces that cannot be melted by a rigid test specimen with a diameter of 3 mm and a length of 300 mm; all other surfaces.
The surface of an electric heater fixed at a distance of not less than 500mm from animals or flammable materials The surface of an electric heater for animals usually placed on the floor E40 lamp (tube) holder
Metal or ceramic type,
Non-ceramic insulation type;
With T mark,
Table 3 is modified as follows:
Change the item "wooden supporting surface, side wall, top plate and bottom plate of the test corner and wooden cabinet" in Table 3 to: Components
Wooden supporting surface, side wall, top plate and bottom plate of the test corner and wooden cabinet 12 Blank chapter
13 Leakage current and electrical strength under working avoidance This chapter in GB4706.1-1998 is applicable. 14 Blank chapter
15 Moisture resistance
This chapter in GB4706.1-1998 is applicable, 16 Leakage current and electrical strength
GB 4706.1—1998 This chapter is applicable. Temperature rise
Overheat protection of transformers and related circuits
This chapter in GB 4706.1—1998 is applicable. 18 Durability
This chapter in GB4706.1—1998 is not applicable. 19 Abnormal operation
GB 4706.47 —1999
This chapter in GB4706.1-1998 is applicable except for the following contents. 19.2 Added:
Appliances that are normally used in suspension should be placed on the base plate of the test angle in the most unfavorable position. Note: To meet this requirement, spacer buttons, bows, rings, protective fences or protective plates designed with the following functions can be used to accelerate the overturning of the appliance when it is placed on the base or base plate.
19.4 Added:
The appliance shall operate as follows under the conditions given in Chapter 11: For appliances equipped with a thermostat but without a built-in fan, the input power obtained in the test specified in Chapter 11 shall be used for this test.
For appliances without a thermostat but with a built-in fan, the fan shall be blocked as specified in 19.7. A pair of appliances equipped with a built-in fan at the same time shall be turned off. Appliances with thermostats and built-in fan should be tested first with the thermostat short-circuited and the fan running and then again with the fan blocked and the thermostat operating as specified in 19.7. 19.13 The following is added to Table 7:
External conductor terminals
Parts of phenolic molded mixtures
Surfaces of electric animal heaters normally placed on the floor Supports or fixing surfaces
Bottoms or side walls of test corners for tests in 19.2 and 19.3 Table 7 is amended as follows:
The item "Side walls, top and bottom of test corners" is replaced by the following: Parts
Side walls, top and bottom of test corners other than supporting or fixing surfaces 1 Except for 19. 2 and 19.3 Test corners other than the bottom plate or side wall 1) 20 Stability and mechanical hazards
This clause in GB 4706.1-1998 is applicable. 21 Mechanical strength
This clause in GB 4706.1-1998 is applicable except for the following. 21.1 Modification
Temperature rise, E
GB 4706. 47 1999
Adjust the hammer spring so that the impact energy is 1 J ± 0.1 J. 21.1 Addition:
Do not apply impact to the radiator of infrared lamp type. The fence should not have a permanent deformation greater than 10 mm. 21.101 The appliance shall withstand the mechanical impact that may occur in normal use. Compliance is checked by the following drop test. The suspended appliance shall be dropped 5 times without the power cord and the hanging bone. The drop height shall be measured from the bottom of the appliance to a hardwood frame with a thickness of at least 50mm, and the value shall be 1m. The non-suspended appliance shall be subjected to a soft energy impact of 6.75J at each point that may be hit during normal use. For independent appliances, this impact test can be carried out by dropping a steel ball with a diameter of 50mm and a weight of 0.53kg from a height of 1.3m or by fixing the steel ball on a rope so that it falls from a height of 1.3m in a pendulum shape. After the above test, the appliance shall not have damage that affects its safety performance. Note: The breakage of replaceable glass radiators can be ignored. 22 Structure
This chapter in GB4706.1-1998 is applicable except for the following contents. 22.39 Added:
For connecting replaceable radiators in heat radiators, ceramic insulated threaded or bayonet lamp () holders are allowed. For E27 lamp (tube) holders, the rated input power of the radiator should not exceed 250W; for E40 lamp (tube) holders, the rated input power of the radiator should not exceed 1 000W. Threaded lamp (tube) holders should comply with the requirements of IEC238. 22.101 In heat radiators, radiators should not have electric heating elements with exposed wires. Compliance is checked by inspection.
22.102 The radiator should be replaceable without completely removing the protective fence. The locking device of the protective fence should not be removable and it should not be possible to accidentally open the lock.
Compliance is checked by inspection and manual test. 22.103 The top and sides of the heat radiator should be protected by a protective mesh, and the side in the radiation direction should be protected by a protective fence. Both protective devices should have mechanical rigidity and corrosion resistance. The mesh width of the protective mesh should not be less than 10mm, but not more than 25mm. The qualification is determined by visual inspection, measurement, manual test and test Ka: fog test specified in GB/T2423.17, that is, the camera fence is placed in the test room (box) for 7d (168h). A 50mm square probe is applied to the protective fence with a force of 20N with its entire cross section. The probe shall not enter the protective fence.
22.104 Portable heat radiators that are not used on the floor should be equipped with a suspension bone that can change the suspension height. The suspension device should be designed so that it will not change its set position due to looseness or accident. Note: The position of the appliance can be changed or the appliance can be prevented from falling by closed hooks (elastic safety hooks) or small rings. Closed loop hooks protruding from the surface can be defined as closed hooks (screw hooks).
The suspension device should be:
Delivered as a complete set, including fixings, hooks and similar accessories for installing the appliance in the position of use; without power cord:
Should be designed and calculated so that it can support 5 times the weight of the appliance or 20kg, whichever is greater; at least 2 square meters long;
Should be corrosion-resistant and flame-resistant
Compliance is determined by inspection, measurement and the following tests: GB 4706. 47 -1999
Fix the suspension device for the radiator in accordance with the manufacturer's instructions. Load the bright body of the appliance so that the load on the suspension device is 5 times the weight of the appliance or 20kg, whichever is greater. The load should be gradually increased and kept for one minute before being removed. The suspension device shall not break.
Take an additional set of suspension device samples and subject them to the salt spray test specified in GB/T2423.17. The suspension device is installed in the normal use state and placed in the test chamber box for 7d (168h). After the test, the suspension device should show no signs of damage that affects compliance with the requirements of this standard. If coated, the coating should not fall off the metal surface and should not agglomerate.
If the suspension device is made of non-metallic materials, another set of additional suspension device samples should be taken and subjected to the glow wire test described in Appendix K. The test should be carried out at a temperature of 850℃. During the application of the glow wire and after the glow wire is removed, the suspension device should not catch fire. 22.105 The gap between the windings of tubular electric heating elements (such as spiral coils) shall not be less than 10mm. Compliance is determined by visual inspection and measurement. 22.106 The heat radiator shall not accumulate heat at any point more than 500mm away from the electric heating element. Compliance is determined by standard inspection and measurement. The temperature measured at a distance of 500 mm from the heating element shall not be greater than the temperature measured at a distance of 500 mm from the heating element. 22.107 The thermal cut-out that operates during the test in 19.4 shall be a non-self-resetting thermal cut-out. If the thermal cut-out is of the manual reset type, it shall have an automatic tripping action.
Compliance is checked by inspection and manual test. 23 Internal wiring
This clause of GB 4706.1-1998 applies. 24 Components
This clause of GB 4706.1-1998 applies. 25 Power supply connection and external flexible cord
This clause of GB 4706.1-1998 applies except as follows. 25.3 Addition:
Appliances mounted on the floor shall be permanently connected to the fixed wiring. 25.7 Replacement:
The power cord shall not be lighter than ordinary polyfluorobutylene sheathed flexible cord (code 245IEC57). Compliance shall be checked by inspection.
26 Wiring wax for external conductors
This chapter in GB 4706.1-1998 is applicable. 27 Grounding
This chapter in GB4706.1-1998 is applicable:
28 Screws and connections
This chapter in GB 4706.1-1998 is applicable. GB 4706. 47 1999
29 Creepage distance, electrical clearance and through insulation distance This chapter in GB 4706.1-1998 is applicable. Heat resistance, flame resistance and electrical carcinogenicity resistance
This chapter in GB 4706.1-1998 is applicable except for the following contents. 30.2 Policy:
The test method is replaced by the following:
Compliance is determined by the tests of 30.2.1, 30.2.3 and 30.2.4 (when necessary). 31 Rust prevention
This chapter in GB 4706.1-1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB 4706.1—1998 is applicable
GB47D6.471999
The appendix in GB4706.1—1998 is applicable except for the following contents. Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T2423.17—1993
Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method 1 Edison thread lamp holder
IEC 23B.1991
Part 2: Particular requirements for room heaters IEC335-2-30:1990
Appendix P
(Standard Appendix)
The harsh working conditions of insulating materials in terms of tracking hazards increase:
The working conditions of electric heaters for animals are extremely harsh working conditions.47 -1999
Fix the suspension device for the radiator in accordance with the manufacturer's instructions. Load the bright body of the device so that the load on the suspension device is 5 times the weight of the device or 20 kg, whichever is greater. The load should be gradually increased and maintained for one minute before being removed. The suspension device shall not break.
Take an additional set of suspension device samples and subject them to the salt spray test specified in GB/T2423.17 test Ka. The suspension device is installed in the normal use state and placed in the test chamber for 7d (168h). After the test, the suspension device shall show no signs of damage that affects compliance with the requirements of this standard. If coated, the coating shall not be separated from the metal surface and shall not agglomerate.
If the suspension device is made of non-metallic materials, another set of additional suspension device samples shall be taken and subjected to the glow wire test described in Appendix K. The test shall be carried out at a temperature of 850℃. The suspension device shall not catch fire during the application of the glow wire and after the glow wire is removed. 22.105 The gap between the windings of tubular heating elements (such as spiral coils) shall not be less than 10 mm. Compliance is determined by inspection and measurement. 22.106 The radiator shall not collect heat at any point more than 500 mm from the heating element. Compliance is determined by inspection and measurement. The temperature measured at a distance of 500 mm from the heating element shall not be greater than the temperature measured at a distance of 500 mm from the heating element. 22.107 The thermal circuit breaker that operates during the test of 19.4 shall be a non-self-resetting thermal circuit breaker. If the thermal circuit breaker is of the manual reset type, it shall have an automatic circuit breaker action.
Compliance is determined by inspection and manual test. 23 Internal wiring
This clause in GB4706.1-1998 applies. 24 Components
This clause in GB4706.1-1998 applies. 25 Power supply connection and external flexible cord
This chapter in GB 4706.1-1998 is applicable except for the following contents. 25.3 Addition:
Appliances mounted on the floor shall be permanently connected to the fixed wiring. 25.7 Replacement:
The power supply cord shall not be lighter than ordinary polyfluorobutylene sheathed flexible cord (code 245IEC57). Compliance is checked by inspection.
26 Wiring wax for external conductors
This chapter in GB 4706.1-1998 is applicable. 27 Grounding
This chapter in GB4706.1-1998 is applicable:
28 Screws and connections
This chapter in GB 4706.1-1998 is applicable. GB 4706.47 1999
29 Creepage distances, clearances and through insulation distances This chapter in GB 4706.1-1998 is applicable. Resistance to heat, flame retardancy and electrical carcinogenesis This chapter in GB 4706.1-1998 is applicable except for the following. 30.2 Policy:
The test method is replaced by the following:
Compliance is determined by the tests of 30.2.1, 30.2.3 and 30.2.4 (if necessary). 31 Rust prevention
This chapter in GB 4706.1-1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB 4706.1—1998 is applicable
GB47D6.471999
The appendix in GB4706.1—1998 is applicable except for the following contents. Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T2423.17—1993
Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method 1 Edison thread lamp holder
IEC 23B.1991
Part 2: Particular requirements for room heaters IEC335-2-30:1990
Appendix P
(Standard Appendix)
The harsh working conditions of insulating materials in terms of tracking hazards increase:
The working conditions of electric heaters for animals are extremely harsh working conditions.47 -1999
Fix the suspension device for the radiator in accordance with the manufacturer's instructions. Load the bright body of the device so that the load on the suspension device is 5 times the weight of the device or 20 kg, whichever is greater. The load should be gradually increased and maintained for one minute before being removed. The suspension device shall not break.
Take an additional set of suspension device samples and subject them to the salt spray test specified in GB/T2423.17 test Ka. The suspension device is installed in the normal use state and placed in the test chamber for 7d (168h). After the test, the suspension device shall show no signs of damage that affects compliance with the requirements of this standard. If coated, the coating shall not be separated from the metal surface and shall not agglomerate.
If the suspension device is made of non-metallic materials, another set of additional suspension device samples shall be taken and subjected to the glow wire test described in Appendix K. The test shall be carried out at a temperature of 850℃. The suspension device shall not catch fire during the application of the glow wire and after the glow wire is removed. 22.105 The gap between the windings of tubular heating elements (such as spiral coils) shall not be less than 10 mm. Compliance is determined by inspection and measurement. 22.106 The radiator shall not collect heat at any point more than 500 mm from the heating element. Compliance is determined by inspection and measurement. The temperature measured at a distance of 500 mm from the heating element shall not be greater than the temperature measured at a distance of 500 mm from the heating element. 22.107 The thermal circuit breaker that operates during the test of 19.4 shall be a non-self-resetting thermal circuit breaker. If the thermal circuit breaker is of the manual reset type, it shall have an automatic circuit breaker action.
Compliance is determined by inspection and manual test. 23 Internal wiring
This clause in GB4706.1-1998 applies. 24 Components
This clause in GB4706.1-1998 applies. 25 Power supply connection and external flexible cord
This chapter in GB 4706.1-1998 is applicable except for the following contents. 25.3 Addition:
Appliances mounted on the floor shall be permanently connected to the fixed wiring. 25.7 Replacement:
The power supply cord shall not be lighter than ordinary polyfluorobutylene sheathed flexible cord (code 245IEC57). Compliance is checked by inspection.
26 Wiring wax for external conductors
This chapter in GB 4706.1-1998 is applicable. 27 Grounding
This chapter in GB4706.1-1998 is applicable:
28 Screws and connections
This chapter in GB 4706.1-1998 is applicable. GB 4706.47 1999
29 Creepage distances, clearances and through insulation distances This chapter in GB 4706.1-1998 is applicable. Resistance to heat, flame retardancy and electrical carcinogenesis This chapter in GB 4706.1-1998 is applicable except for the following. 30.2 Policy:
The test method is replaced by the following:
Compliance is determined by the tests of 30.2.1, 30.2.3 and 30.2.4 (if necessary). 31 Rust prevention
This chapter in GB 4706.1-1998 is applicable. 32 Radiation, toxicity and similar hazards
This chapter in GB 4706.1—1998 is applicable
GB47D6.471999
The appendix in GB4706.1—1998 is applicable except for the following contents. Appendix A
(Appendix to the standard)
Cited standards
Addition:
GB/T2423.17—1993
Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method 1 Edison thread lamp holder
IEC 23B.1991
Part 2: Particular requirements for room heaters IEC335-2-30:1990
Appendix P
(Standard Appendix)
The harsh working conditions of insulating materials in terms of tracking hazards increase:
The working conditions of electric heaters for animals are extremely harsh working conditions.
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