Luminaires - Part 2-20: Special requirements - Lamp strings - Scope 1: This part of GB 7000 specifies the safety requirements for lamp strings with a power supply voltage not exceeding 250 V, used indoors or outdoors, in series or in parallel, and in series parallel combinations of incandescent lamps. Note 1: The Christmas tree light string is an example of using a series or series parallel light string. An example of using a parallel light string for lighting a snowpath or promenade is the use of a light string. Note 2: For lamp strings equipped with plug-in lamp holders, the corresponding requirements of this section shall apply. Note 3: In some countries, the word 'chains' is replaced by' strings'. Note 4: When using non-standard lamp strings (such as plug-in lamps), the lamp is considered a part of the lamp string and included in the test (if any, included in the certificate). 1.1 Normative References: The clauses in the following documents are referred to in this part of GB 7000 and become the clauses of this part. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions do not apply to this section. However, parties to agreements based on this section are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this section. GB 1002-1996 Types of Plugs and Sockets for Household and Similar Purposes - Basic Parameters and Dimensions GB 4343-1995 Measurement Methods and Permissible Values for Radio Interference Characteristics of Electric and Heating Appliances, Electric Tools, and Similar Appliances for Household and Similar Purposes (eqv CISPR 14; 1993) GB/T 5013 (All Parts) Rubber Insulated Cables with Rated Voltages of 450/750 V and Below (IEC 60245 (All Parts), IDT) GB/T 5023 (all parts) PVC insulated cables with rated voltages of 450/750 V and below (IEC 60227 (all parts), IDT) GB 7000.1 Luminaires, Part -: General Requirements and Tests (GB 7000.1-2007, IEC 60598-1; 2003, IDT) GB 17936 Bayonet Lampholders (GB 17936-2007, IEC 61184; 1997, IDT) GB 19510,12 Lamp Control Devices Part 12: Special Requirements for Miscellaneous Electronic Circuits Used with Luminaires (GB 19510.12-2005, IEC61347-2-11:2001, IDT) IEC 60238:2004 Screw Lampholders IEC 6032o: 1981 Appliance Couplers for General and Similar Purposes
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