Believe it or nuts, ‘ise’s last "perpendicular blade" device is the same or very similar to the ‘NEMA 2-20’-series wiring devices, currently assigned as a 250V non-grounding configuration. In the early 1970s, CalOSHA {California} had a field day with the so-called dual-rated wiring devices. One standard device rating at that time was 600VAC/250VDC, so the circuit voltage could be just about anything.

[Linked Image from 64.146.180.232]



[This message has been edited by Bjarney (edited 06-02-2003).]