N is polarized - but it assumes the device will retain the grounding middle pin, which forces a specific orientation. If the device uses two pins, or the user cuts out the middle pin, there’s no physical size difference to prevent inverting the polarity.
N is polarized - but it assumes the device will retain the grounding middle pin, which forces a specific orientation. If the device uses two pins, or the user cuts out the middle pin, there’s no physical size difference to prevent inverting the polarity.