johngeorge,

This are excerpts from the 2001 NEC Style Manual.

Quote
2.1.3 Articles. Articles are chapter subdivisions that cover a specific subject such as grounding, overcurrent protection, lighting fixtures, and so on. Each article shall have a title. Articles are divided into sections and sometimes into parts.

2.1.4 Parts. If an article is sufficiently large, it shall be permitted to be subdivided into parts that correspond to logical groupings of information. Parts shall have titles and shall be designated by Roman numerals. (See example.) Parts typically consist of a number of sections; see 2.4.2.1 for section numbering in articles that are subdivided into parts.

Example:
I Installation
II Construction Specifications
III Grounding

2.1.5 Subdividing Sections. Sections shall be permitted to be subdivided for clarity, with each subdivision representing either a rule or a part of a rule. Up to three levels of subdivisions shall be permitted, and any level shall be permitted to contain a list.

2.1.5.1 List Formats. Lists are a method of structuring the items necessary to complete a rule. Lists in any subdivision level shall be numbered, and listed items shall be single words, phrases, or sentences. Items in a list shall not contain titles.


(Example)

Example:
Chapter ---- Chapter 2 Wiring and Protection
Article ---- Article 250 ---- Grounding
Part ---- II Conductors
Section ---- 250.121 Identification and Size of Equipment Grounding Conductors.Unless otherwise required in this Code, equipment grounding conductors shall be permitted to be bare, covered, or insulated.
Level 1 ---- (A) Identification of Conductors. An insulated or covered conductor larger than No. 6 copper or aluminum shall be permitted to be identified, at the time of installation, by one of the following means:
List item ---- (1) Stripping the insulation or covering from the entire exposed length.
List item ---- (2) Coloring the exposed insulation or covering green.
List item ---- (3) Marking the exposed insulation or covering with green tape or green adhesive labels.

*****************

2.6 Exceptions.
2.6.1 Placement and Order. Exceptions shall immediately follow the main rule to which they apply.

Exceptions containing the mandatory terms shall or shall not are to be listed first in the sequence.

Permissive exceptions containing shall be permitted are to follow any mandatory exceptions and be listed in their order of importance as determined by the Code-Making Panel.

2.6.2 Numbering. Where there are two or more consecutive exceptions, each shall be numbered.


That's my take on how it reads too. The Exception in our Example ('99 NEC 210-8(a))is to the Rule (above it) of Required GFCI protection and includes the locations in the list between them. - That would also mean that the exception concerning snow-melting equipment ('02 NEC 210-8(b)would apply to both the Kitchen and Rooftop areas. [Linked Image]

Anybody have an older NEC Style Manual?

Bill

[This message has been edited by Bill Addiss (edited 12-17-2001).]

Bill