Mystery plug on Honda Generator
From the left, NEMA L14-30R outlet, L14-30P plug, L14-20R outlet, and L14-20P plug
NEMA L14-30R and L14-20R are twist-lock equipped 120/240V, 30A and 120/240V, 20A receptacles, respectively. In the same order, they can provide power of up to 7200 W or 4800 W.
NEMA L14-30 connectors are commonly used to power household appliances which require 240 V and to hook up home backup generators to transfer switches. On the other hand, NEMA L14-20 connectors are rarely encountered. Note that both connectors can be interfaced with their non-twist-locked counterparts by an appropriate adapter.
NEMA L14-30R and L14-20R Outlets​
From the left, NEMA L14-30R outlet, L14-30P plug, L14-20R outlet, and L14-20P plug
NEMA L14-30R and L14-20R are twist-lock equipped 120/240V, 30A and 120/240V, 20A receptacles, respectively. In the same order, they can provide power of up to 7200 W or 4800 W.
NEMA L14-30 connectors are commonly used to power household appliances which require 240 V and to hook up home backup generators to transfer switches. On the other hand, NEMA L14-20 connectors are rarely encountered. Note that both connectors can be interfaced with their non-twist-locked counterparts by an appropriate adapter.