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200.4 (A)&(B) Neutral Conductors

Change Summary

  • If more than one neutral is in the same enclosure, grounded and ungrounded conductors of the same circuit must be grouped
  • Two exceptions relax grouping requirements for cables if the grouping is obvious and for un-spliced loops in conduit bodies or boxes
  • This section now includes subdivision (B) Multiple Circuits and is arranged in a list format
NEC® Text

 
200.4 Neutral Conductors.
Neutral conductors shall be installed in accordance with 200.4(A) and (B).
(A) Installation. (See NEC text)
(B) Multiple Circuits. Where more than one neutral conductor associated with different circuits is in an enclosure, grounded circuit conductors of each circuit shall be identified or grouped to correspond with the ungrounded…(See NEC text)
Exception No. 1: The requirement for grouping or identifying shall not apply if the branch-circuit or feeder conductors enter from…(See NEC text)
Exception No. 2: The requirement for grouping or identifying shall not apply where branch-circuit conductors pass though…(See NEC text)

Copyright© 2013 National Fire Protection Association

(See NEC for complete text)

Expert Analysis

This section has been revised into a list format and has been expanded to require grouping or identification where multiple circuits with neutral(s) are installed in the same enclosure(s). The grouping or identification must be accomplished using suitable identification means, cable ties, or similar means at least once in the enclosure to establish grouping of neutral conductors with their associated ungrounded conductors of the circuit(s). Two exceptions have also been added to (B). Exception No. 1 relaxes the grouping requirement for cables where the cable installation makes the grouping obvious.
Exception No. 2 relaxes the grouping requirement for un-spliced loops in conduit bodies or boxes as provided in 314.16(B)(1). This revision results in an enhancement for identifying neutral conductors with their corresponding ungrounded circuit conductors enhancing safety and the quality of multiple branch circuit installations within the same enclosure(s).

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