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1.8 Perpendicular slot duplex outlet
1.9 Perpendicular slot RP-2B outlet 10 A 42 V AC
Another obsolete outlet, made by Bryant, 125 V 15 A and 250 V 10 A rating. A NEMA 5‐20 125 V 20 A or 6‐15 250 V 15 A plug with a missing ground pin would fit this outlet, but a NEMA 2‐20 plug is slightly too big to fit.
The upper slots as seen in the illustration connect to silver-colored wiring screws on the upper side, and the lower slots connect to brass-coloured wiring screws on the lower side.
In Australia, the same or similar T-configuration socket-outlets are used for DC power outlets, such as in stand-alone power systems (SAPS), on boats and in police vehicles. Polarity is inconsistent.
In the former Soviet Union this socket-outlet was and still is commonly used for wiring in places where the voltage is lowered for safety purposes, like in schools, filling stations or in wet areas, and is rated 42 V 10 A AC. Such an unusual connection is intended specifically to make the connection of standard higher-voltage equipment impossible.
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