Mains socket polarity?

[12AX7]

Does the polarity of the 2 black mains wire from the PT matter in how they are connected to the socket? I've always just connected them either way, and they aren't marked, But since the mains themselves have polarity i started wondering about this. And if so, how would you determine which goes where since the wires are both black?

[sluckey]

Does the polarity of the 2 black mains wire from the PT matter in how they are connected to the socket?

No.

[12AX7]

Thats what i figured. Stupid question, but i had to ask. Thanks.

[jjasilli]

Not a stupid question.  AC does not have polarity per se; but is has phase.  That is, the sine wave of one secondary wire will be dipping below -0- volts, while the other one is rising above.  You can see which is which on an oscilloscope; or the manufacturer might be mark it by code on the tranny.  The phase does not matter for guitar amps; but I think it might matter for some special applications.