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aluminum bottom entry
non-metal bottom entry
aluminum front entry
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Gen/Tran 20A Power Inlet Boxes
120/240V NEMA L1420

For installations where the building electrical panel is located indoors and generator is located outdoors.  Eliminates need for open window or door for generator cord.  Raintight NEMA 3R box can be mounted on exterior of building and wiring may be run through wall to transfer switch or panel.  The 14202 and 1420V feature brushed aluminum construction which can be painted in field.  Twist lock male L1420P power inlet receptacle is mounted on box for cable connection to generator, 5000 watt maximum.  UL listed.

Note that the 14202 and 14204 boxes have the cable inlet underneath the bottom making it weather proof even when a cable is connected.  But for easy safe connection of the cable the box has to be mounted high enough to see the bottom to check for insect nests and to plug in cable.  The flip lid is optional for the 14202 box and must be ordered separately.

The 1420V box has the inlet mounted on the front which makes it easier to plug in the cable.  The flip lid is included and installed on this box.

WARNING: Never install this inlet box without connecting it to a transfer switch.  If this product is not used with a transfer switch, it is not allowed by the National Electrical Code to supply power from a portable generator to a premises wiring system because of safety concerns.  These concerns include the dangers of back feeding into the utility grid and possible damage when utility power is restored.  Click here for more about safety.




14202 14204 1420V
Current (Amps) 20 20 20
Voltage  120/240 120/240 120/240
Inlet location bottom bottom front
Size (W x H x D) inches   6 x 5 x 5 4.25 x 4 x 6.5
Enclosure Material aluminum glass filled nylon resin aluminum
Flip Lid included? No Yes Yes
Origin Made in USA   foreign origin Made in USA  



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Cordset for connecting generator RJB12410 or RJB12425
Flip Lid cover for 14202 box FLPIB

Aluminum 14202 Bottom Inlet Aluminum 1420V Front Inlet with Flip Lid
discontinued discontinued
Non-metal 14204 Bottom Inlet