The line number or phase that the measurement for this receptacle branch represents for each measurement in this row of the table. The phases are as follows: Line# Description 1 Line 1-N (A) for Line-to-Neutral measurements 2 Line 2-N (B) for Line-to-Neutral measurements 3 Line 3-N (C) for Line-to-Neutral measurements 1 Line 1-2 (A-B) for Line-to-Line measurements 2 Line 2-3 (B-C) for Line-to-Line measurements 3 Line 3-1 (C-A) for Line-to-Line measurements