Please could someone advise me on what standard, if any, might compel a 
manufacturer to rate the operating voltage of their equipment to at least cover 
the utility supply tolerance of the region in which it is being sold?
For example, a DoC for an IT item sold in the UK claims conformance with the 
requirements of LVD Directive 2014/35/EU and EN62368-1:2014+A11:2017 but it is 
not clear to me that the specified voltage rating of 100 - 240 Vac necessarily 
covers UK utility supply tolerance of up to 253 Vac, or even in much of the EU 
at 243.8 Vac.

Thanks,
Phil Agar
EMC Compliance
      
   
   

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