[BC] to fluorescents

[PeterH5322]

>> I'll bet it was 277/480 fluorescents and not 120/240.
>> 
>please elaborate

Many older installations had 120 for lighting, regardless of the service, 
even if it required a customer-owned "dry type" transformer.

Most new installations are 277/480 Y, and the fluorescent lighting is 
277, which is still "300 volt class", as is 120 volts, so the same wiring 
methods and materials may be employed, yet there is no need for a 
customer-owned transformer.