What is the difference between NEMA 5-15 and NEMA 5-15P power cords?
The NEMA naming conventions indicate the voltage level, amperage rating, and whether it is suited to a plug or receptacle. Both NEMA 5-15 and 5-15P models have voltages of 5V and amperage ratings of 15. The letter at the end indicates "P" for plug or "R" for receptacle; the NEMA 5-15 does not specify plug or outlet.
What voltages can NEMA 5-15P power cords handle?
The NEMA 5-15P is rated for 125V.