Safety of household and similar electrical appliances - Particular requirements for waterbed heaters GB 4706.58-2002 Safety of household and similar electrical appliances - Particular requirements for waterbed heaters GB4706.58-2002 Standard download decompression password: www.bzxz.net

ICS 97.100.10
National Standard of the People's Republic of China
GB4706.58—2002
Safety of household and similar electrical appliances-Particular requirements for water-bed heaters(IEC 60335-2-66:1993,MOD)
Promulgated on November 29, 2002
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on August 1, 2003
GB4706.58—2002
All technical contents of this part are mandatory. This part is modified to adopt IEC60335-2-66:1993 "Safety of household and similar electrical appliances Part 2: Particular requirements for waterbed heaters", including its amendment IEC60335-2-66-Amd1:2000. This part is used in conjunction with GB4706.1-1998 "Safety of household and similar electrical appliances Part 1: General requirements". The part of this part written "applicable" indicates that the corresponding clauses in GB4706.1--1998 are applicable to this part; the part of this part written "replace" or "modify" is subject to this part; the part of this part written "add" indicates that the clauses of this part are added to the corresponding clauses in GB4706.1--1998.
Due to the requirements of Chinese law and the special needs of industry, this part was modified when IEC60335-2-66:1993 was adopted. These technical differences are marked with a vertical single line in the margins of the clauses to which they refer. Technical differences between this part and 1EC60335-2-661993 and their reasons: Chapter and article number of this part
Technical differences
The original text in IEC60335-2-66:1993 is "6.1 Addition: The rated voltage of Class 1 appliances shall not exceed 24V\. China does not allow Class 0, Class 01 and Class 1 appliances. Delete 22.102 in the original text of IEC60335-2-66;1993. The original text is \22.102 Class 1 appliances with grounded metal mesh should use additional insulation between the metal mesh and the easily accessible surface. Appendix A of this part is a normative appendix. This part is proposed by the China Light Industry Federation. This part is under the jurisdiction of the National Technical Committee for Standardization of Household Electrical Appliances. The main drafting unit of this part: Shenzhen Exit-Entry Inspection and Quarantine Bureau of the People's Republic of China. The main drafters of this part: Xie Jinxiong, Liu Zehua, Xu Beibei, Lou Runyu, Lu Wenjun. Reason
To suit China's national conditions.
The Class 1 appliances described in this article are not applicable to China. 931
GB 4706.58--2002
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 carries out international standardization activities and publishes international standards. The formulation of these standards is entrusted to technical committees. Any IEC National Committee interested in the work can participate in the formulation work. International, governmental and non-governmental organizations associated with IEC can also participate in this work. IEC and the International Organization for Standardization (ISO) work closely together on the basis of mutual agreement. 2. IEC formal resolutions or agreements on technical issues formulated by technical committees in which all national committees with a special interest in the issue participate, represent as far as possible the international consensus on the issues involved. 3. These formal resolutions or agreements are published in the form of standards, technical reports or guidelines, recommended for international adoption, and accepted by the National Committees in this sense.
4. In order to achieve international consensus, IEC National Committees are committed to using IEC International Standards to the greatest extent possible in their national and regional standards. IEC Differences between the standard and the corresponding national or regional standard shall be clearly indicated in the latter. 5. IEC has not established a procedure for the application of the approval mark. IEC assumes no responsibility for claims that a device complies with an IEC standard. This standard was prepared by IEC Technical Committee 61 (Safety of Household and Similar Electrical Appliances). This standard is based on the following documents:
61(CO)760
Full material on the adoption of this standard can be found in the above voting report. Voting Report
61(CO)772
This standard is based on the third edition of IEC60335-1, formulated in 1991, and should be used in conjunction with the latest edition of IEC60335-1 and its supplements.
This standard supplements or modifies the corresponding clauses in IEC60335-1, thereby converting it into the IEC standard: Safety requirements for waterbed heaters. IEC60335-1 clauses not covered by this standard apply where reasonable. If "addition", "modification" or "replacement" is marked in this standard, the relevant clauses of IEC60335-1 shall be modified accordingly. Note 1: The following typographical fonts are used in this standard: requirements; Roman font;
Test method·italic;
Note": small Roman font.
Boldface characters are defined in Chapter 2.
Note 2: The clauses and charts added to IEC60335-1 are numbered starting from 101. The following differences exist in some countries:
--2.2.9: Different conditions for normal operation (United States). - Chapter 3: Limitation of the use of DC components on the neutral line of the appliance (Australia). - 6.1: Class 1 appliances are not allowed (China, Czechoslovakia, Norway and Yugoslavia) . --7.12.1: The surface shape of the mattress must be stated (USA). -11.8: The temperature rise shall not exceed 65K (USA). -11.101: No test is performed (USA). --21.101: A different test is performed to test the mechanical strength (USA). -24.101: Self-resetting thermal circuit breakers are allowed (USA). 932
1 Scope
Safety of household and similar electrical appliances
Particular requirements for waterbed heaters
This chapter in GB4706.1-1998 is replaced by the following content. GB4706.58--200 2
This standard deals with the safety of electric waterbed heaters and associated control components for household and similar purposes, with a rated voltage not exceeding 250 V. Appliances not intended for general household use but which may nevertheless constitute a source of danger to the public, such as appliances intended for use in hotels, are within the scope of this standard.
As far as practicable, this standard deals with common hazards arising from appliances that are exposed to all persons in and around the dwelling. This standard does not generally take into account the following situations:
- Use of appliances by unattended young children and disabled persons; - Use of appliances by young children.
Note 1: Pay attention to the following situations| |tt||一~ For devices intended for use in vehicles, ships or aircraft, some additional requirements may be required, ... For devices intended for use in tropical countries, some special requirements may be required! - In many countries, additional requirements are specified by national health departments, departments responsible for labor protection, national water supply departments and similar departments. Note 2: This part does not apply to:
-Medical devices (IEC60601),
-Device used in water.
2 Definition
This chapter in GB4706.1-1998 is applicable except for the following contents. 2.2.9 This item is replaced by the following:
Normal operation
Install the heater and its control components under the water mattress according to the instructions for use and make the appliance work. The appliance is placed on a wooden base frame of appropriate size. The top surface of the base frame is a composite board with a thickness of about 13mm, supported by a pine board with a thickness of about 20mm, 150mm above the ground. The boards are assembled into a rectangular frame and divided into six parts of roughly equal area by one vertical and two horizontal boards. A sheet of polyether foam sponge with a thickness of about 25mm is used to completely cover the wooden base frame. The specifications of the polyether material are: number of holes per meter: 18+;
Mass density: 30kg/m3+1%;
Hardness: According to GB/T10807-1989, the force of 40% indentation is 120N~170N. Note 1: If the instructions state that the heater is not suitable for installation on a soft support, this sheet of polyether material is not used. Note 2: If otherwise specified in the installation instructions, the polyacetal layer shall be covered with other material. The heater and all control devices are placed on the polyether material. A sheet of water mattress base material measuring 10 cm x 20 cm is folded in half to 5 cm x 20 cm and placed approximately in the middle of the longest side of the upper surface of the heater, with the fold parallel to its shortest side. The mattress is placed on the heater, filled with water and completely covered with a polyether material similar to the above, approximately 36 mm thick. 933
GB4706.58—2002
Water-bed heater
Appliances comprising a heating element mounted in an enclosed casing and intended for use under a mattress. Note 1: The water-bed heater may be mounted in the outer casing of the mattress. Note 2: The appliance may be equipped with a thermostat whose sensing element requires positioning during installation. 3 General requirements
The contents of this clause of GB4706.1-1998 are applicable. 4 General conditions for testing
This chapter of GB4706.1-1998 is applicable except for the following contents. 4.3 This clause adds the following contents:
After the test in Chapter 11, the test in 21.101 shall be carried out. 5 Blank chapter
6 Classification
This chapter of GB4706.1-1998 is applicable except for the following contents: 6.1 This clause is replaced by the following contents:
In terms of protection against electric shock, the appliance shall belong to Class II or Class II. The rated voltage of the appliance in Class II shall not exceed 24V. Compliance shall be checked by visual inspection and relevant tests. 6.2 The following content is added to this clause:
If the non-subclass structural parts of the appliance are intended to be placed under a water mattress, their protection level should be at least IPX7.7 Marking and instructions
This chapter of GB4706.1-1998 is applicable except for the following content:7.1 The following content is added to this clause:
The appliance should be marked with the following content:
Read the instructions carefully;
Before filling the mattress with water, check and ensure that the heater, mattress and any outer cover are placed flat and without wrinkles;-The support under the heater should be flat, continuous and without sharp edges; It is only used to heat the water bed;
Where applicable, mark "this side up".
Removable control parts should be marked with:
Rated voltage or rated voltage range (unit: V);-Symbol of the nature of the power supply, except for the rated frequency;The name, trademark or identification mark of the manufacturer or responsible underwriter;The model and specifications of the appliance.
The markings of waterbed heaters and their removable control components shall ensure that these components can be identified as a whole. 7.12.1 The following content is added to this clause:
The instructions shall include the following content:
-Detailed installation methods of the heater and its control device. In particular, the correct 934
positioning and installation methods of all temperature sensing components of the control components shall be detailed to ensure that the components are not easily dislodged from the established positions; -The minimum size of the water mattress and the minimum depth of water it can hold; -When applicable, it shall be stated that the heater can only be used with removable control components designed specifically for it; -The appliance is not intended for use in hospitals;
The appliance is only used to heat waterbeds;
Sharp objects such as needles or nails shall not be inserted into the appliance; GB4706.58-2002
-The positioning direction of the plug of Class 1 appliances with metal mesh to reduce capacitive leakage current and electrostatic field in the socket. A method for checking the positioning should be given;
Note: This clause does not apply to polarized plugs. If the heater is installed on a soft support, the additional support material required should be detailed; if the heater is not suitable for this application, a statement should be made;
Bedding does not come into contact with the heater.
8 Protection against contact with live parts
The contents of this chapter in GB4706.1-1998 are applicable. 9 Starting of electric appliances
The contents of this chapter in GB4706.1-1998 are not applicable. 10 Input power and current
The contents of this chapter in GB4706.1-1998 are applicable. 11 Heating
The contents of this chapter in GB4706.1-1998 are applicable except for the following contents. 11.2 This clause is replaced by the following contents:
The appliance is installed in normal working condition.
11.3 This clause is replaced by the following:
The temperature rise on the surface of the waterbed heater and the surface temperature of the mattress are measured with a fine-wire thermocouple connected to an oxidized copper plate with dimensions of 65 mmX 65 mmX0.5 mm.
11.4 This clause is replaced by the following:
If the sensing element of the thermostat is not fixed in position relative to the heater after installation, the thermostat is short-circuited. NOTE: If the sensing element is placed outside the heater housing and no means of fixing it is considered to be unfixed. 11.7 This clause is replaced by the following:
The appliance is operated until a steady state is established.
11.8 This clause is replaced by the following:
The temperature rise on the surface of the waterbed heater shall not exceed 35 K, but the surface temperature rise under the folding material shall be limited to 60 K. 11.101 The appliance shall operate so that there is no risk of heatstroke to the user. Compliance is checked by the following test.
The appliance shall operate in accordance with the provisions of 11.1 to 11.7, but the thermostat shall not be short-circuited. The control device shall be adjusted to the lowest setting. The upper surface temperature of the water mattress shall not exceed 37°C. 12 Blank Chapter
GB4706.58—2002
Leakage current and electrical strength at working temperature 13
This chapter in GB4706.1—1998 is applicable except for the following contents. 13.2 This clause adds the following contents:
The leakage current of Class 1 appliances with metal mesh connected to live parts shall not exceed 0.25 mA when the selector switch is in one position and shall not exceed 0.75 mA when it is in the other position. 14 Blank Chapter
Moisture resistance
The contents of this chapter in GB4706.1—1998 are applicable. 5 Leakage current and electrical strength
The contents of this chapter in GB4706.1-1998 are applicable. 17 Overload protection of transformers and related circuits The contents of this chapter in GB4706.1-1998 are applicable. 3 Durability
The contents of this chapter in GB4706.1-1998 are not applicable. 19 Abnormal operation
The contents of this chapter in GB4706.1-1998 are applicable except for the following contents. 19.2 Add the following contents to this clause:
The test is conducted without folding the water mattress material. Drain the water in the water mattress.
19.4 Add the following contents to this clause:bzxZ.net
Note: If the short-circuit thermostat test has been carried out in Chapter 11, this test is not carried out. 19.13 Add the following contents to this clause:
The temperature rise on the surface of the water bed heater shall not exceed 100 K. The test shall not affect the degree of protection provided by the appliance against harmful intrusion of water. Stability and mechanical hazards
The provisions of this clause in GB4706.1-1998 are applicable. 21 Mechanical strength
This clause in GB4706.1-1998 is applicable except for the following provisions. 21.101 If the heater of the appliance is mounted on a soft support, the appliance shall be able to withstand the mechanical stresses to which it may be subjected in normal use. Compliance is checked by the following test. The appliance operates as specified in clause 11, but without a cover. A downward force of 950 N ± 40 N is applied to the water mattress in the most unfavourable position using the wooden block shown in Figure 101, at a frequency of approximately 30 times per minute for 25,000 times.
During the test, the power input shall not deviate from the power value at the start of the test by more than +5% and -10%. 936
After the test, damage to the heater shall not affect compliance of the appliance with this standard. 22Structure
GB4706.1--1998, except for the following provisions. GB4706.58-2002
22.101 Class I appliances with metal mesh connected to live parts shall be provided with means to indicate that the plug is inserted into the outlet socket and that the leakage current has been minimized.
Compliance is checked by inspection and manual test. Note 1: This requirement does not apply to appliances with polarized plugs. Note 2: The indication method may require manual operation. For example, a light-emitting diode will illuminate when a surface is touched. Internal wiring
GB 4706.1--1998, except for the following provisions. 23.5 This clause is supplemented with the following provisions:
Natural rubber shall not be used as insulation for internal wiring. 24 Components
GB4706.1---1998, except for the following provisions. 24.101 Thermal cut-outs shall be non-self-resetting. 25
: Power supply connection and external flexible cord
This chapter in GB4706.1-1998 is applicable except for the following contents. 25.5 The following contents are added to this clause:
Type B connection can be used.
25.7 The following contents are modified to this clause:
Lightweight polyvinyl chloride sheathed flexible cord can be used for any quality of appliance. 25.15 The following contents are modified to this clause:
Instead of marking 2 cm from the flexible cord fixture, the mark should be made as close to the fixture as possible. Instead of the tension and torque values ​​specified in Table 10 of GB4706.1-1998, the test shall be conducted in accordance with the following requirements: Fixing device for interconnecting flexible cord:
·Tension: 100 N
·Torque: 0.1Nm
-Fixing device for power cord:
·Tension: 60N
·Torque: 0.1 Nm
25.23 This clause adds the following content:
The insulation of the interconnecting flexible cord shall be at least equivalent to the insulation of ordinary polyvinyl chloride sheathed flexible cord (No. 53 wire of IEC60227). 6 Terminals for external conductors
The contents of this chapter in GB4706.1-1998 are applicable. 27 Grounding measures
The contents of this chapter in GB4706.1-1998 are applicable. 937
GB4706.58-2002
Screws and connections
The contents of this chapter in GB4706.1-1998 are applicable. 29 Creepage distances, electrical clearances and through insulation distances This chapter in GB4706.1-1998 is applicable except for the following contents. 29.2.1 This clause adds the following contents:
After the heater is installed, the sheet insulation should not be touched. 29.2.2 This clause adds the following contents:
Note: The inaccessibility of the insulation is evaluated after the appliance is installed. 30
Heat resistance, flame resistance and tracking resistance
This chapter in GB4706.1-1998 is applicable except for the following contents. 30.1 This clause adds the following contents:
The outer casing of the heater is not tested.
30.2.2 Not applicable.
31 Rust prevention
The contents of this chapter in GB4706.1-1998 are applicable. Radiation, toxicity and similar hazards
The contents of this chapter in GB4706.1-1998 are applicable. 938
Additional charges
Wooden blocks used in Figure 10121.101
GB4706.58-2002
Unit: millimeters (mm)
GB4706.58-2002
The appendix of GB4706.1-1998 is applicable except for the following contents. Appendix A (Normative Appendix) Referenced Normative Standards This appendix adds the following content: GB/T10807-1989 Test method for indentation hardness of flexible cellular polymeric materials (idt ISO2439:1980)
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