However, for permanently energized electrical equipment installed in an environment where the temperature caused by non-electrical equipment situated in that environment exceeds the T6 temperature limit, the temperature classification of the permanently energized electrical equipment shall be at least that of the T4 temperature class.
Siiski ei tohi püsielektriseadmetel, mis paiknevad keskkonnas, kus seal asuva mitteelektrilise aine tekitatud temperatuur ületab temperatuuripiiri T6, olla madalam temperatuuriklass kui T4.