Secondary Circuits

[fifty60]

I'm still wrestling with whether or not any equipment that plugs into a standard wall outlet (120V US or 230V Europe) would be considered a secondary circuit and not a primary circuit. Here is the definition of a secondary circuit:

"Secondary circuits are circuits where separation from MAINS CIRCUITS is achieved by a transformer in which the primary windings are separated from the secondary windings by reinforced insulation, double insulation, or a screen connected to the protective conductor terminal"

A wall outlet would meet the above, right?

 

[GoldDigger]

What they are talking about this is close to one example of what the NEC refers to as a separately derived system.
If there is not a transformer between the service and the circuit in question, there cannot be a secondary circuit.
Where the definition of secondary circuit differs from a simple separately derived system is in the amount of isolation required to qualify.
A secondary circuit is still part of the building wiring system, not a piece of utilization equipment.

Your wall outlet does not be involve a transformer, so no it has nothing to do with a secondary circuit.
Nor does a "wall wart" since that is utilization equipment.

Tapatalk!