The L stands for Locking. The number after the L is the series.
For example, L12 is 3pole-3Wire, 3ᴓ, 480 V.
L15 is 3pole-4wire, 3ᴓ, 250 volt
On a 3 phase plug. say L15-30ap. the 30 stands for the amps but what boes the L-15 stand for,or L-12, or L-14 when it has the same amperage? Thanks
I have a L-14 20p and a L-15 20p, will both of these fit into a L-14 20 receptical ? Thanks
The size and orientation of the blades will change as you progress through the various voltages and amperages. The direction of the tab on the keying terminal will also shift between inward and outward. You either have to know the series and amperage of the receptable to get the proper plug, or take it with you to try the various ones.