Product Change Announcement
Effective 29 January 2021, the standard keying position for 120 volt, 208 volt, and 120/208 dual voltage DSN20s and DXN20s has been changed from position 16 to position 12. As discussed below, this change revises the physical location of the phase and neutral contacts within the device, requires new part numbering, and creates compatibility concerns with the existing installed base of 120, 208, and 120/208 volt devices keyed at position 16.
After evaluation of several potential design modifications, it was determined that rekeying the 120, 208, and 120/208 volt devices was the most effective means of eliminating the possibility of this improper connection.
This change is being made in response to recent field issues in which users were able to mistakenly connect a single phase 120 volt plug keyed at position 16 into a three phase 480 volt receptacle keyed at position 04. While the voltage mismatch does not negatively affect the plug or receptacle and is not a safety issue for the user making the improper connection, it creates an overvoltage condition that may damage connected equipment.
Click the link to read the full announcement.