In a split phase residential panel I am accustomed to seeing the legs named L1 and L2.
I had always assumed that the L stood for leg.
Occasionally I see 220V devices that label power connections as L1, L2 and N.
Occasionally I see 120V devices that label the neutral terminal as L2.
Is this proper?
In what situations is it proper to use L1 and L2 as labels?
Would it be proper to use it on the secondary of a low voltage transformer?