plug - Why AC socket polarity is important? - Electrical In North America sockets and plugs design makes sure you'll be able to plug only in a certain way: Why is this important for AC? Moreover, many plugs, such as cellphone chargers, are in fact symmetric, i.e. not "sensitive" to the way they are plugged.The wide slot is supposed to be the neutral, the narrow slot the hot. Neutral is nominally supposed to be near ground potential. However, there's..Best answer · 4The "hot" supply wire is more dangerous to a person than the "neutral" return wire: Neutral is closer to ground potential. For safety: Equipment t..1Think that you have two wired communication devices whose ground is not isolated from the mains ground (i.e. supposed to be connected to the wall g..0What to do when a device doesn't specify it's DC polarityconnector - How to tell polarity expected of a DC barrelSee more results DETERMINING PROPER AC POLARITY - Galen Carol Audio DETERMINING PROPER AC POLARITY. Technically, the transformer in the power supply can induce a charge (up to 90 volts) on the chassis side of each component. Interconnects allow currents to flow between all of the associated components in your system which is likely to modulate the ground reference of each consecutive gain stage.