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(2) Units With One 20-Ampere Branch Circuit
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Recreational vehicles having only one 20-ampere branch circuit as permitted in 551.42(B) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 20 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C)(1).
Informational Note: Complete details of this configuration can be found in ANSI/NEMA WD 6-2016, Wiring Devices — Dimensional Specifications, Figure 5.20.
FIGURE 551.46(C)(1) Configurations for Grounding-Type Receptacles and Attachment Plug Caps Used for Recreational Vehicle Supply Cords and Recreational Vehicle Lots.
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