NEMA 14–30R and 14–50R split-phase receptacles. These differ only in shape of the neutral prong and in current rating (<i>see </i><a href="https://en.wikipedia.org/wiki/Industrial_%26_multiphase_power_plugs_%26_sockets#NEMA_14" class="extiw" title="w:Industrial &amp; multiphase power plugs &amp; sockets">NEMA 14-30 and 14-50</a><i> for more information</i>).
Clockwise from the top of each receptacle, the pin designations are: <i>ground</i>, <i>live</i>, <i>neutral</i>, <i>live</i>.<br><small>Note: Anti-clockwise it's the very same!</small>
<a href="//commons.wikimedia.org/wiki/User:Zippanova" title="User:Zippanova">Zippanova</a>
2005-01-11
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