230.56 Service Conductor with the Higher Voltage to Ground.
San Francisco Building Inspection Commission Codes · 2022 edition · updated 2026-08-28 · San Francisco
On a four-wire, delta-connected service, where the midpoint of one phase winding is grounded, the service conductor having the higher phase voltage to ground shall be durably and permanently marked by an outer finish that is purple in color, or by other effective means, at each termination or junction point.
230.71(A) Revise this section and add two exceptions as follows:
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