Vertex Standard VZ-30-G6-4 User Manual page 13

in 9 a risk of fire and /or electric shock. If an extension cord
must be used, make sure that:
The pins on the plug of the extension cord are the same
number, size, and shape as those on the plug of the
charger.
The extension cord is properly wired and in good
electrical condition.
The cord size is 18AWG for lengths up to 100feet, and
16AWG for lengths up to 150 feet.
9.The supply cord of this charger can not be replaced.
9