For example , UL 248 - 19 allows photovoltaic fuses to be rated up to 1500 volts , DC , versus 1000 volts under the general requirements .
The general requirements ( 248 - 1 ) apply except as modified by the supplemental part ( 240 - x ) .
UL 248 - 19 allows photovoltaic fuses to be rated up to 1500 volts , DC , versus 1000 volts under the general requirements .
The general requirements ( 248 - 1 ) apply except as modified by the supplemental part ( 240 - x ) .