[Al_The_Man]

There are many, unshielded, foil shield, foil and braid, in order of cost.
Search the Belden or Alpha catalogues.
e.g. http://www.belden.com/techdatas/metric/8729.pdf
Al.

[Skiroy]

Okay AL I have along way with understanding PNP,NPN and 2 wire switches.
I just have one last question. Lets say I was going to use a N.O. Prox switch on a door so that when the door is closed it will energize a timer relay coil. I just tried a PNP and got it to work. So the question is, why would I choose a 2 wire sink/source prox switch vs a PNP prox switch? It seems to me both would work fine,so why choose one over the other?

By the way the 2 wire switch can be used to either pass negative or positive,in other words in sink or source mode.

So I am failing to see a senerio that one would need a PNP when they could use the 2 wire switch?