Quote:I assumed that the housekeeping functions built into remote control equipment would be sufficient draw to take out an HDMI. Nowadays, appliances turned off doesn't mean open circuit.
Yes. That kind of unit is usually designed to connect all the grounds together. That way, a nearby strike which induced voltages into loops would not be able to create large device to device voltages. Cable, data and tel lines can be very exposing to nearby strikes.
Loop trapping during a nearby strike can induce around 400 volts per square meter of loop, it falls off as 1/r. It also depends on severity, rate of rise of the current, and whether it's a leader, initial, or a return stroke. Since the standard thinking (I don't agree) is to put low level runs far away from power dist., we force large loops. The cable feed to power feed loop in a house, when large, will allow a nearby strike to induce wild voltages at the tv input jack.. Multiport point of use supressors can alleviate that.
I don't think it needs to be so expensive however..it's not the MOV capacity at play here, just the connection.
Within the context of our present discussion, this device should prevent a neutral/ground float from killing the low level interconnect circuitry.
Edited by jneutron - 4/26/13 at 9:27am