Grounded conductors ______ and larger can be identified by distinctive white or gray markings at their terminations.
a) 10 AWG
b) 8 AWG
c) 6 AWG
d) 4 AWG
See answer and applicable Code reference
The correct answer is: d) 4 AWG
Article 200 provides requirements for the use and identification of grounded conductors. As noted in Sec. 200.6(B)(4), An insulated grounded conductor 4 AWG or larger shall be identified at the time of installation by a distinctive white or gray marking at its terminations. This marking shall encircle the conductor or insulation.