 These two-pin connectors were not polarized, and thus the line and neutral conductors could be exchanged depending on which way the connectors were mated.Two-pin connectors may still be found on some equipment and are often saved by electricians for wiring ungrounded fixtures (particularly "practicals"), though this may not be advisable from a safety standpoint.Modern stage pin connectors have incorporated a third pin for a safety ground connection and are commonly referred to as "two pin and ground" ("2P&G") to distinguish them from their ungrounded two-pin predecessors.