The e-ILV provides free access to all the terms and definitions contained in the international standard CIE S 017:2020 ILV: International Lighting Vocabulary, 2nd edition.
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partly reinforced insulated lampholder
lampholder for building-in so designed that some parts of the lampholder require additional means to fulfil the requirements with regard to double or reinforced insulation
Note 1 to entry: In some cases, the dimensions might be achieved only after mounting into the luminaire.