Fuse missing from main disconnect panel

[Elvisbeehive]

Hi there, I run a recording studio out of an early 50's built warehouse. I've been having electrical noise and ground loops in my audio equipment since I've been here (almost a decade) and I've finally decided I can't deal with it anymore. I'm going to install a new main panel as well as new ground rods. While I was preparing to start the job I noticed that the main disconnect for the power coming from the pole is missing a fuse in the middle bay. What could be the reasoning for this? Would this be causing any issues?

There is a second disconnect at the ancient main panel that has all three fuses installed. Any advice would be fantastic!

Thanks!

 

[Electro-tech]

It would appear you are only using 2 phases. As the second picture shows no connection at bottom of the centre fuse link.

 

[UNG]

It would appear you are only using 2 phases. As the second picture shows no connection at bottom of the centre fuse link.

Given the OP is in the US it could be a split phase supply

 

[pc1966]

This is really one for @Megawatt who is USA based so best able to advise.

Also I think the USA earthing/grounding practices have changed a lot since the 50s so that alone might help reduce the noise you are seeing.

 

[Megawatt]

Hi there, I run a recording studio out of an early 50's built warehouse. I've been having electrical noise and ground loops in my audio equipment since I've been here (almost a decade) and I've finally decided I can't deal with it anymore. I'm going to install a new main panel as well as new ground rods. While I was preparing to start the job I noticed that the main disconnect for the power coming from the pole is missing a fuse in the middle bay. What could be the reasoning for this? Would this be causing any issues?

There is a second disconnect at the ancient main panel that has all three fuses installed. Any advice would be fantastic!

Thanks!

Could you please tell us what voltage it is to ground and phase to phase