Within sight means visible and not more than from the equipment.
Right Answer is:
Insight From (Within Sight From, Within Sight):- This Code specifies that one equipment shall be “insight from,” “within sight from,” or “within sight of,” and so forth, another equipment, the specified equipment is to be visible and not more than 15 m (50 ft) distant from the other.
This definition typically applies to utilization equipment and disconnecting means. Under many circumstances, a disconnect is required to be within sight of and not more than 15 m (50 ft) from its associated equipment. The intent is to make sure that a person maintaining or repairing that utilization equipment can verify that the disconnecting means is off and the equipment is de-energized.