I have asked this question in the general area, without any success. This seems the better place for it anyways.
I have to mount a large metal frame on a building, 20' wide and up to 170' in the air.
It is part of the buildings facade.
I will mount more than 12,000 LED's on that frame and supply them with 2.5V.
I will run insulated wires of suitable cross section to these LEDs (those wires are routed inside steel tubing). My ground would be the tubing itself, sort of a large scale coax cable.
The question is the grounding.
Basically I have a huge antenna here, and who knows what I will find on that frame in downtown San Francisco.
Is it better if I connect my frame to the building steel, which makes the "antenna" even larger, or would it be better to separate my frame electrically from the building and use a dedicated and beefy grounding wire just for my installation?
My fear is that spurious AC on my frame will elevate my 2.5 DC and mess up my display.
I have to mount a large metal frame on a building, 20' wide and up to 170' in the air.
It is part of the buildings facade.
I will mount more than 12,000 LED's on that frame and supply them with 2.5V.
I will run insulated wires of suitable cross section to these LEDs (those wires are routed inside steel tubing). My ground would be the tubing itself, sort of a large scale coax cable.
The question is the grounding.
Basically I have a huge antenna here, and who knows what I will find on that frame in downtown San Francisco.
Is it better if I connect my frame to the building steel, which makes the "antenna" even larger, or would it be better to separate my frame electrically from the building and use a dedicated and beefy grounding wire just for my installation?
My fear is that spurious AC on my frame will elevate my 2.5 DC and mess up my display.