There’s no interlock pin on these. The 5th is a neutral. Hubbell makes a few versions of these with an interlock system (these, but these are just 3 phase 208v plugs with ground and neutral.
The one on the tip of the plug is a locking nub, proper outlets have a power switch that will only allow the plug to be removed when switched off, otherwise mechanically locking it into the outlet.
That is mostly there for another reason, to distinguish between different voltages.
When a connector is meant for a different voltage the Earth connector (which is thicker than the rest) gets moved along the circle so it would be impossible to plug it into one with a different voltage. The nub stops you from just turning the plug to make it fit.
Greetings from Germany from someone who has used these quite a few times, mostly 16A and 32A variants and has never seen a locking one.
I may have misspoke, the cord cap is capable of being locked in, but the receptacle does not have any sort of locking mechanism, it’s just a receptacle outlet. The only ones that have the interlock are the ones with a switch lever or knob attached to the unit.
There’s no interlock pin on these. The 5th is a neutral. Hubbell makes a few versions of these with an interlock system (these, but these are just 3 phase 208v plugs with ground and neutral.
The one on the tip of the plug is a locking nub, proper outlets have a power switch that will only allow the plug to be removed when switched off, otherwise mechanically locking it into the outlet.
That is mostly there for another reason, to distinguish between different voltages.
When a connector is meant for a different voltage the Earth connector (which is thicker than the rest) gets moved along the circle so it would be impossible to plug it into one with a different voltage. The nub stops you from just turning the plug to make it fit.
Greetings from Germany from someone who has used these quite a few times, mostly 16A and 32A variants and has never seen a locking one.
All wall mounted outlets in Italy have the locking disconnector
I may have misspoke, the cord cap is capable of being locked in, but the receptacle does not have any sort of locking mechanism, it’s just a receptacle outlet. The only ones that have the interlock are the ones with a switch lever or knob attached to the unit.