Is it OK to leave the back feed test switch in the test position after installing within the rack?
The purpose of back feed protection (which you must not leave disabled) is to is to protect the user from electric shock when they unplug an input lead from its source socket. Normally, an unconnected input plug will have a voltage appear across it when the other input plug is connected. This is because the solid state devices used in the STS are not perfect switches and let through some leakage current, which creates a voltage across the terminals. The back feed protection circuit eliminates this danger by shunting any leakage current to ground, there-by ensuring that the residual voltage on the plug is at a safe level if inadvertent contact is made.
