GB/T 4706.34-2024Safety of household and similar electrical appliances - Part 34: Particular requirements for commercial electric forced convection ovens, steam cookers and steam-convection ovens (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is Part 34 of GB/T 4706 "Safety of Household and Similar Electrical Appliances". GB/T 4706 has been published as follows part.

--- Part 1: General requirements;

--- Part 2: Particular requirements for electric irons;

--- Part 121: Particular requirements for professional ice cream machines.

This document replaces GB 4706.34-2008 "Safety of commercial electric forced convection ovens, steam cookers and Compared with GB 4706.34-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Changed the scope of Chapter 1 and added content related to equipment used on ships (see Chapter 1, Chapter 1 of the 2008 edition);

--- Added the terms and definitions of "functional surface" and "adjacent surface" (see 3.110, 3.111);

--- Added requirements for the waterproof level of appliances and other appliances used on the desktop (see 6.2);

--- Added the content that should be marked on the equipment, such as. indicating the rated pressure of the pressure-bearing parts, and for the easily accessible external surfaces, the equipment should be marked with Symbol 5041 (2002-10) specified in IEC 60417 or marked with warning content (see 7.1);

--- Added the symbol requirements for high temperature surface warning (see 7.6);

--- Added the requirement that the height of the triangle used in symbol 5041 (2002-10) specified in IEC 60417 should not be less than 15 mm Request (see 7.14);

--- Added the requirement that the markings on external accessible surfaces should be visible when the appliance is in normal operation, and the requirement that the markings on fixed appliances should be visible when the appliance is in normal operation, and the information given is specified in the requirements (see 7.15);

--- Added the maximum food loading capacity that should be clearly stated in the instructions and the warning content that should be included in the instructions (see 7.12);

--- Added requirements for measuring temperature rise on external accessible surfaces (see 11.3);

--- Changed the provisions for appliances under different working conditions (see 11.7, 11.7 of the 2008 edition);

--- Added the maximum temperature rise value of the external accessible surface specified under normal working conditions (see 11.8, Table 101);

--- Changed the allowable value of leakage current for class I stationary appliances and the allowable value of leakage current for class I portable appliances (see 13.2, 13.2 of the 2008 edition);

--- After adding the "withstand spilled liquid" test, if there is doubt about the test results and the test is repeated, the rinse agent composition to be used (see 15.2, Table 102);

--- Added requirements for mechanical properties of carbon steel and alloy steel fasteners and corrosion-resistant stainless steel fasteners (see 28.1, 28.4);

--- Changed the allowable value of leakage current for class I stationary appliances and the allowable value of leakage current for class I portable appliances (see 16.2, 16.2 of the 2008 edition);

--- Added requirements for moving parts of related appliances. They are not applicable to parts necessary for performing tilting operations.

The compliance of the test probe No. 41 in GB/T 16842-2008 is checked by applying a force of 10N (see 20.2);

--- Changed the connection requirements between the power supply and the wiring terminals under different conditions (see 25.3, 25.3 of the 2008 edition);

--- Changed the provisions for the type of power cord used (see 25.7, 25.7 of the 2008 edition);

--- Changed the temperature requirements for the glow-wire test (see 30.2.1, 30.2.1 of the 2008 edition);

--- Added the compliance requirements for screws made of carbon steel, alloy steel and stainless steel (see 28.1);

---Added screws for mechanical and electrical connections and screws for mechanical connections and grounding continuity to keep the minimum the requirements for contact pressure and the assembly torques for threaded connections to provide earthing continuity are given (see 28.4);

--- Added Table 102 "Rinse agent composition" and Table 103 "Assembly torque of threaded connections providing ground continuity" (see Table 102,

Table 103);

--- Added Figure 102 "Warning sign to prevent scalding hazard", Figure 103 "Identification of temperature measurement surface", Figure 104 "Measurement surface temperature" Probe for measuring degrees" and Figure 105 "Adjacent surfaces not to be measured" (see Figures 102, 103, 104 and 105);

--- Added Appendix P "Guidelines for the application of appliances used in tropical climates" (see Appendix P);

--- Added Appendix AA "Apparatus used on ships" (see Appendix AA);

--- Increased the mechanical strength and rust resistance requirements for equipment used on ships (see 21.AA.102, 21.AA.101,

This document is equivalent to IEC 60335-2-42:2017 "Household and similar electrical appliances - Safety - Part 2-42.Commercial electrical force Particular requirements for convection ovens, steam cookers and steam convection ovens.

The following minimal editorial changes were made to this document.

--- The name of the standard was changed to "Safety of Household and Similar Electrical Appliances Part 34: Commercial Electric Forced Convection Ovens, Steam Cookers and Steamers Special Requirements for Steam Convection Ovens" to enhance the coordination of the standard system;

--- Add the table number and title to the table below 15.2 of IEC 60335-2-42:2017, and change Table 102 to Table 103;

---Correct "IEC 60584-1" in the reference number description B of Figure 104 of IEC 60335-2-42:2017 to "IEC 60584-1.

2013";

--- Correct "6.3" in Appendix N of IEC 60335-2-42:2017 to "10.1".

Introduction

GB/T 4706 "Safety of Household and Similar Electrical Appliances" adopts most of IEC 60335.On this basis, GB/T 4706 refers to the structure of IEC 60335 is divided into several parts, consisting of general requirements and special requirements. Part 1 is general requirements, and the other parts are for products covered by special requirements, their safety requirements are general requirements used in combination with the special requirements.

The requirements include supplements and modifications to the corresponding clauses in the general requirements to provide complete requirements for each product.

This document is the protection requirements for electrical, mechanical, thermal, fire and radiation risks when the appliance is used normally in accordance with the instructions.

This document also covers abnormal conditions that may occur during use and considers how electromagnetic interference may affect the safe operation of the equipment.

This document has taken into account the requirements specified in GB/T 16895 "Low Voltage Electrical Installations". The appliance is connected to the power supply in accordance with the electrical wiring rules.

requirements are coordinated.

If multiple functions of an appliance involve other parts of GB/T 4706, the other parts shall apply to the appliance separately as long as it is reasonable.

Each function. If applicable, consider the impact of one function on other functions.

When no additional requirements are given in other parts for hazards already included in this document, GB/T 4706.1 applies.

GB/T 4706 is a standard covering appliance safety and takes precedence over general standards/horizontal standards covering the same subject.

This document is used in conjunction with GB/T 4706.1-2024 "Safety of Household and Similar Electrical Appliances Part 1: General Requirements".

The part marked "applicable" in the document indicates that GB/T 4706.1-2024 "Safety of Household and Similar Electrical Appliances - Part 1: General Requirements" the corresponding clauses in the "Requirements" shall apply to this document; for the parts marked "replace" in this document, the clauses in this document shall prevail;

The "Add" part indicates that in addition to complying with the corresponding clauses in GB/T 4706.1-2024, the additional clauses in this document must also be complied with.

Clause; The part marked "modified" in this document indicates that the corresponding clauses of GB/T 4706.1-2024 are modified.

Safety of household and similar electrical appliances Part 34: Commercial electric forced convection ovens, steam ovens Particular requirements for cookers and steam convection ovens

1 Scope

This chapter of GB/T 4706.1-2024 is replaced by the following.

This document specifies the safety requirements for commercial electric forced convection ovens, steam cookers and steam convection ovens not intended for household use.

The rated voltage of single-phase appliances connected to one phase line and neutral line shall not exceed 250V, and the rated voltage of other appliances shall not exceed 480V.

This document also covers commercial electric forced convection ovens, steam cookers and steam convection ovens used on board ships. For such appliances, Appendix AA applies.

NOTE 101 Such appliances are suitable for use in commercial food processing, for example in restaurants, canteens, hospital kitchens and commercial enterprises such as bakeries and butchers.

The electrical parts of appliances using other forms of energy are also within the scope of this document.

To the extent practicable, this document deals with the common hazards arising from this type of equipment.

Note 102.Pay attention to the following.

--- For equipment intended for use in vehicles or aircraft, necessary additional requirements are permitted;

--- The relevant national management departments may impose additional requirements on the equipment;

--- The relevant national management departments have stipulated additional requirements for pressure equipment.

Note 103.This document does not apply to.

---Appliances designed for industrial purposes;

--- Apparatus used in places with special conditions such as corrosive or explosive atmosphere (dust, steam or combustible gas);

---Utensils for continuous mass production of food;

--- Commercial microwave ovens (IEC 60335-2-90).

2 Normative references

Except for the following contents, this chapter of GB/T 4706.1-2024 applies.

The following content is added to this chapter.

ISO 898-1 Mechanical properties of carbon steel and alloy steel fasteners Part 1: Bolts, screws and nut fasteners with specified property classes Coarse and fine pitch threads (Mechanical properties of fasteners made of carbon steel and loy steel) Part 1: Bolts,screwsandstudswithspecifiedpropertyclasses-Coarsethreadandfinepitchthread) Note. GB/T 3098.1-2010 Mechanical properties of fasteners - Bolts, screws and studs (ISO 898-1:2009, MOD) ISO 3506-1 Mechanical properties of corrosion resistant stainless steel fasteners Part 1: Bolts, screws and studs propertiesofcorrosion-resistantstainlesssteelfasteners-Part 1: Bolts,screwsandstuds) Note. GB/T 3098.6-2023 Mechanical properties of fasteners Stainless steel bolts, screws and studs (ISO 3506-1:2020, MOD) ISO 3506-2 Mechanical properties of corrosion resistant stainless steel fasteners Part 2: Nuts (Mechanical properties of corro-sion-resistantstainlesssteelfasteners-Part 2: Nuts) Note. GB/T 3098.15-2014 Mechanical properties of fasteners Stainless steel nuts (ISO 3506-2:2009, MOD) ISO 3506-3 Mechanical properties of corrosion-resistant stainless steel fasteners Part 3: Set screws and similar fasteners not subjected to tensile stress Mechanicalpropertiesofcorrosion-resistantstainlesssteelfasteners-Part 3: Setscrewsand similarfastenersnotundertensilestress)