|
For those tech types -
Article 551, RVs and RV parks - National Electrical Code (NEC) [NFPA 70] 2008 Edition
(1) Units with One 15-Ampere Branch Circuit. Recreational vehicles having only one 15-ampere branch circuit as permitted by 551.42(A) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 15 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C).
(2) Units with One 20-Ampere Branch Circuit. 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).
FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-2002, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure 5.20.
(3) Units with Two to Five 15- or 20-Ampere Branch Circuits. Recreational vehicles wired in accordance with 551.42(C) shall have an attachment plug that shall be 2-pole, 3-wire grounding type, rated 30 amperes, 125 volts, conforming to the configuration shown in Figure 551.46(C), intended for use with units rated at 30 amperes, 125 volts.
FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-2002, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure TT.
(4) Units with 50-Ampere Power-Supply Assembly. Recreational vehicles having a power-supply assembly rated 50 amperes as permitted by 551.42(D) shall have a 3-pole, 4-wire grounding-type attachment plug rated 50 amperes, 125/250 volts, conforming to the configuration shown in Figure 551.46(C).
FPN: Complete details of this configuration can be found in ANSI/NEMA WD 6-2002, National Electrical Manufacturers Association’s Standard for Dimensions of Attachment Plugs and Receptacles, Figure 14.50.
(D) Labeling at Electrical Entrance. Each recreational vehicle shall have permanently affixed to the exterior skin, at or near the point of entrance of the power-supply cord(s), a label 75 mm 45 mm (3 in. 1 in.) minimum size, made of etched, metal-stamped, or embossed brass, stainless steel, or anodized or alclad aluminum not less than 0.51 mm (0.020 in.) thick, or other suitable material [e.g., 0.13 mm (0.005 in.) thick plastic laminate] that reads, as appropriate, either
THIS CONNECTION IS FOR 110–125-VOLT AC,
60 HZ, ____ AMPERE SUPPLY.
or
THIS CONNECTION IS FOR 208Y/120-VOLT or 120/240-VOLT AC, 3-POLE, 4-WIRE,
60 HZ, ______ AMPERE SUPPLY.
The 2004 Montanas and later are configured as (4). The Pre-2004 Montana configurations are no longer recognized by NEC
|