52.4-B2e)    Supporting Conductors of 7500-20,000 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500-20,000 volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-20,000 next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-20,000 volts on the same structures shall be marked as high voltage.

52.4-B2e)    Supporting Conductors of 7500- 20,00021,000 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500- 20,000 21,000   volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-20,00021,000  next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-20,00021,000 volts on the same structures shall be marked as high voltage.

52.4-B2e)    Supporting Conductors of 7500-21,000 Volts on the Same Structure With Conductors of 750 Volts or Less:  Where, on the same structures in rural districts, crossarms supporting conductors of 7500-21,000 volts are above conductors of 750 volts or less, the crossarm supporting conductors of 7500-21,000 next above the conductors of 750 volts or less shall be marked as high voltage.  All crossarms supporting conductors of 7500-21,000 volts on the same structures shall be marked as high voltage.