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Grayboy Illustrated Code Changes - NEC Ch. 1 - Article 110 Part 1 - 110.15

James Stallcup Sr. & Jr.

A new 110.15 has been added that explains the use and location of the high-leg from the service equipment, feeder circuits, branch-circuits and other electrical related equipment throughout the NEC.

Author’s Note: The marking of the high-leg should be in Article 110 where it would apply to all types of installations and not just to services, feeders and switchboards and panel boards. The new 110.15 will meet the intent of the NEC and also simplify the application of the rules pertaining to the high-leg. Also review 210.4(D), 215.8, 230.56, and 408.3(E), FPN.

Reference Information:

Type of Change Panel Action UL UL508 API 500 API 505 OSHA
New Section Accept in Part - -- - -
ROP ROC NFPA 70E NFPA 70B NFPA 79 NFPA 20 NEMA
pg. 73# 1-233pg. 41# 1-136 - - -- -
log 1499CMP 1 log 1135Submitter   Larry Wendt - Mark Berner1999 NEC 110-15IEC -