90VA Intercom System Transformer
90VA central power supply transformer for multi-unit apartment intercom systems, providing 16V AC for door stations and handsets. HTS 8504.31.40.65 classification for building communication transformers 40VA-1kVA. Includes thermal overload protection.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If digital IP intercom power supplies
Modern communication apparatus classifies under heading 8517
If with DC output for electronic door stations
Rectified DC intercom power classifies as static converter
If integral to building entry control panels
Control panels with communication transformers classify separately
Not sure which classification is right?
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Import Tips & Compliance
• UL1950 Information Technology Equipment listing for intercom power supplies
• Building code compliance documentation for multi-family installations
• Station capacity and wiring distance calculations prove transformer sizing
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