Re: L5-30 wire for 220V?
Bennett, as I mentioned in my response, if you're going to assume that neutral and ground are swapped on the L6-30, then why not make that assumption about every receptacle in the whole building? At some point, the assumption is going to have to be made that it is correct, or everyone needs to use batteries at every gig they do. It's just as easy to wire an Edison wrong as it is anything else....
I guess if there is any doubt, then don't use the receptacles. It could be a call based on the building itself. If the building appears to be in good repair, modern, neat, etc, then the power could be fine. If it is obvious that the receptacles are 50 years old, they're all worn out and loose, and that the owner's wife's grandpa has hacked up rewiring the building five times, then I'm probably not going to provide any gear there anyway.
And I never said that I've only seen perfect wiring. I've come across plenty of stuff that was wrong, illegal, scary, and where buildings were probably going to burn down in the next 5 minutes. That's when I don't touch anything; I get by with one wall plug (that meters correctly) for the show, and get out of there!
