Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Limited value

It's hard to take this book seriously when it states (p. 8) "The term neutral is not defined in Article 100 of the Code. The term is used very sparingly in the Code. Theoretically, there should be no potential difference between the neutral conductor and ground." In fact, in the 2005 NEC Handbook, it is used twice in Article 100, and 644 times overall. (It appears 315 times in the NEC itself.) Further, the neutral is not always grounded. In a large sidebar in Article 200 of the Handbook, it states "The grounded conductor is often, but not always, the neutral conductor. For example, in a single-phase 2-wire or in a 3-phase corner-grounded delta system, the intentionally grounded conductor is not a neutral conductor." The author seems to have an inadequate grasp of his topic, both conceptually and factually. The NEC Handbook is a far better use of readers' time and money.