fmtjfw
Senior Member
- Location
- Fairmont, WV, USA
I'm looking for constructive criticism on the following, and if you think it is merited, support in the form of comments from you on 6-40. Thanks, Jim Williams
4 Comment:
Table 310.15(B)(3)(a) Adjustment Factors for More Than Three Current-Carrying Conductors in a Raceway or Cable
Number of conductors is the total number of conductors in the raceway or cable, including spare conductors. The count shall be adjusted in accordance with 310.15(B)(5), and (6), and (X). and shall not include conductors that are connected to electrical components but that cannot be simultaneously energized. [ROP 6?40]
310.15(B)(X) Diversity. When two or more conductors cannot be simultaneously energized due to the nature of the circuit, only the maximum number of simultaneously energized shall be considered current-carrying conductors.
Informational note: The two conductors used as travelers between 3-way and 4-way switches count as one current-carrying conductor under this rule.
5 Statement of Problem and Substantiation.
The concept of not including all the conductors in a group where not all are simultaneously energized (e.g.: 3-way travelers) is important enough that it should be in the main text, not buried in the text following a table. The ideal location would be 310.15(B)(7), and shift the present (7) to (8).
If 310.15(B)(7) is moved to 310.15(B)(8) the following references would need to be fixed:
110.14(C)(1)
230.90(A) <except 5>
550.33(B)
Example D7
-----------------------
310.15(B)(5) is common neutrals
310.15(B)(6) is grounding or bonding conductors
310.15(B)(7) is dwelling reduction
4 Comment:
Table 310.15(B)(3)(a) Adjustment Factors for More Than Three Current-Carrying Conductors in a Raceway or Cable
Number of conductors is the total number of conductors in the raceway or cable, including spare conductors. The count shall be adjusted in accordance with 310.15(B)(5), and (6), and (X). and shall not include conductors that are connected to electrical components but that cannot be simultaneously energized. [ROP 6?40]
310.15(B)(X) Diversity. When two or more conductors cannot be simultaneously energized due to the nature of the circuit, only the maximum number of simultaneously energized shall be considered current-carrying conductors.
Informational note: The two conductors used as travelers between 3-way and 4-way switches count as one current-carrying conductor under this rule.
5 Statement of Problem and Substantiation.
The concept of not including all the conductors in a group where not all are simultaneously energized (e.g.: 3-way travelers) is important enough that it should be in the main text, not buried in the text following a table. The ideal location would be 310.15(B)(7), and shift the present (7) to (8).
If 310.15(B)(7) is moved to 310.15(B)(8) the following references would need to be fixed:
110.14(C)(1)
230.90(A) <except 5>
550.33(B)
Example D7
-----------------------
310.15(B)(5) is common neutrals
310.15(B)(6) is grounding or bonding conductors
310.15(B)(7) is dwelling reduction