What is the difference between 12 volts and 12 Vdc?

[Oldman]

????
Olds

[FLBentRider]

The same thing in my world. 12 volt systems are usually DC. I've never seen 12 volts AC.

[Arcs_n_Sparks]

The 12 VDC is explicit; telling you what expect. 12 volts alone is more vague. Low voltage A.C. around the house is found in doorbell and home thermostat systems, although those are typically higher.

Arcs_n_Sparks

[Oldman]

Thanks!