Phase letter "V" shall be used as a suffix on the cable identification code to identify the ungrounded wire or cable that is in a single phase system.
A导线识别代码的后缀应使用“V”字母作为后缀，以识别单相系统中未接地的电缆或导线。
B导线识别代码的前缀应使用“V”字母作为后缀，以识别单相系统中未接地的电缆或导线。
C字母“V”应用作前缀以识别导线代码和单相系统中未接地的导线或电缆。
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