I know this topic has been discussed many times; however, I haven't found anything that will help with this outlet type specifically. I am using a L15-20 plug on the end of my machine cord and would like to make some pigtail adapters for it. Questions:

1) Is it acceptable to use a female L15-20 and make a pigtail down to a 110v outlet (removing the red wire of course)?

2) Is it ok to use a female L15-20 and run it up to a 480V outlet?

3) Does it matter what side the black and white wires go on when dropping to 110v?

Any answers to these questions would be very helpful and appreciated.

Thanks