[Mondial]

In this case, the polarized plug won't help. In the 38-8, there are two line caps to the chassis, one from the hot line conductor and one from the neutral. Regardless of which way the plug is inserted, there will always be 60 volts AC present on the chassis with respect to neutral or earth ground. The two caps form a capacitive voltage divider, with the chassis connection at the center point.

One way around this is to use a 3 conductor cord with a grounded plug. Then the chassis is always connected to safety ground, and the leakage current is bypassed directly to earth.