Can anyone tell me why 3pin XLR plugs with metal bodies offer a fourth connection to plug metalwork (& therefore chassis grounding).
Wondered when you might use this. Would it ever be wise to connect Chassis (& presumably earth grounds together). These days with many audio products double insulated & therefore not earthed could it be potentially dangerous, or might it be beneficial to have the cases earthed (assuming signal ground is separated from the casework on your double insulated device).
My new shiny Neutrik XLRs have the three signal pins for balanced connection plus the 4th pin for Chassis ground. Why have this if it's never used with a cable?
Is there any standardisation when it comes to whether signal screens are independent:
-safety / mains ground
-casework where double insulated (doesn't the casework become an extension of the cable screen in this case).
Confused!
Wondered when you might use this. Would it ever be wise to connect Chassis (& presumably earth grounds together). These days with many audio products double insulated & therefore not earthed could it be potentially dangerous, or might it be beneficial to have the cases earthed (assuming signal ground is separated from the casework on your double insulated device).
My new shiny Neutrik XLRs have the three signal pins for balanced connection plus the 4th pin for Chassis ground. Why have this if it's never used with a cable?
Is there any standardisation when it comes to whether signal screens are independent:
-safety / mains ground
-casework where double insulated (doesn't the casework become an extension of the cable screen in this case).
Confused!