标准依据：EN 60838-1 10.4 Contacts and all other current-carrying parts shall be so constructed as to prevent excessive temperature rise. The holder contacts are bridged by means of a tes**p, having nominal dimensions, inserted
in the holder, the terminals of which are fitted with conductors of the maximum cross-sectional area for which the holder is intended. The lampholder is loaded for 1 h with 1,25 times its rated current.The temperature rise of the contacts shall not exceed 45 K. This temperature is determined with the aid of melting particles or by thermocouples, not by means of thermometers.