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Section 408.3(E)(1) of the California Electrical Code is hereby amended to read:

AC Phase Arrangement. Alternating-current phase arrangement on 3-phase buses shall be A, B, C from front to back, top to bottom, or left to right, as viewed from the front of the switchboard, switchgear, or panelboard. The C phase shall be that phase having the higher voltage to ground on 3-phase, 4-wire, delta-connected systems. Other busbar arrangements shall be permitted for additions to existing installations and shall be marked.

(Ord. 3535 § 1, 2022; Ord. 3473 § 1, 2019; Ord. 3389 § 1, 2016; Ord. 3373 § 1, 2016; Ord. 3289 § 1, 2013; Ord. 3173 § 1, 2010; Ord. 3121 § 1, 2009; Ord. 3091 § 1, 2007; Ord. 3013 § 1, 2005; Ord. 2875 § 1, 2002; Ord. 2785-B § 1, 1999).