On Sat, 30 Jan 2016 23:24:59 -0600, "dangerous dan"
wrote:

While looking at this wall plug, I noticed it has a designated side for white wire, and a designated side for black wire. In the past I never saw that on a plug and just put it on whichever side was handy.

Is there a valid reason for putting a specific color wire on a specific side? I personally wouldn't think so, but maybe an electrician would know a reason, or someone more knowledgeable.
Always has been the differentiation, and for VERY good reason!!! One
side is referenced to ground - the other side is 120 volts above
ground potential. With polarized plugs or grounded outlets it is very
important which is which.