response to Bob
response to Bob
A client had a lot of low voltage systems - Fire Alarm, HVAC controls get fried by lightning and requested we look at how to protect building. On my visit to site, the topic of grounding was also introduced, the client was concerned that old building (school) wasn't grounded properly. So, I went to site for what I thought was one issue (lightning) and it became two separate issues. Most of the original panelboard feeders are slabbed in conduit. From what I've heard from contractors and others, rigid conduit may degrade or rust out over time. I don't know if this happens or has happened so I was wondering if there's a way to test ground path.