Mapping Center Answer:

Many of the Power Utility Companies have created or use fonts that are purchased from another vendor and or their status is proprietary. We've found that there isn't a whole lot of sharing of the purchased fonts (approprieate, due to copyrights) or posting of the standards. What we'd suggest is that you take a look at what the styles that esri has already in the software (Utilities Style: Electric, Water, etc.) and start with using the symbols as is, then customize their appearance through symbol representations.