- Location
- Massachusetts
I have seen a number of posts on the forums about using an amp clamp to take a quick load reading to determine if new loads could be added.
Of course that may be a start but it does not comply with the NEC and really has a potential for failure if you take the readings at the wrong time.
Here are some screen shots of power logging a switchboard at an office building. The company I work for had me place a recording meter there for a few days to get a rough idea of the loading so they could get started with design. Now I have another meter there doing at least a 30 day recording for NEC compliance.
I have included the current and voltage graphs for just phase C but A & B where very similar. I also included the min / max report.
I just thought some would find it interesting and I think it shows the problems with doing just quick amp clamp measurements.
Of course that may be a start but it does not comply with the NEC and really has a potential for failure if you take the readings at the wrong time.
Here are some screen shots of power logging a switchboard at an office building. The company I work for had me place a recording meter there for a few days to get a rough idea of the loading so they could get started with design. Now I have another meter there doing at least a 30 day recording for NEC compliance.
I have included the current and voltage graphs for just phase C but A & B where very similar. I also included the min / max report.
I just thought some would find it interesting and I think it shows the problems with doing just quick amp clamp measurements.