[mccrajos]

I've got an sjtow (300 volt) plug but would like to use an stow(600 volt) plug because it is longer. Can I ?

[Stratmando]

Looks like you can. Try:

http://www.jamesmonroewire.com/flexiblecord.html

[tkrussell]

Any electrical device or equipment rated at a higher voltage or amperage can be used for any voltage lower than it's rating, just cannot exceed the rating.