So doing the math, 26 amps at 480VAC. So 12.5kW of power. Power was using simple DC equation so it could be better or worse, excuse my rusty knowledge.
True I just got off work and I wasn’t reading properly, I seemed to confound 1.0 cal/cm2 with amps in my excitement, and forgetting it is also RMS and not stated here.
Hey it’s OK to not know what you’re looking at…480v is the RMS voltage, but it really doesn’t have much to do with this.
This is an arc flash label. It tells you how big a boom a piece of electrical equipment can make.
It is based on many factors, not just voltage, power, and amperages. It factors in equipment sizes and gaps, locations in the system, etc. to generate a model of how much boom it can go.
So doing the math, 26 amps at 480VAC. So 12.5kW of power. Power was using simple DC equation so it could be better or worse, excuse my rusty knowledge.
Where did the 26 amps come from?
The amount of ouch is on the label: 391 cal/cm2
True I just got off work and I wasn’t reading properly, I seemed to confound 1.0 cal/cm2 with amps in my excitement, and forgetting it is also RMS and not stated here.
Hey it’s OK to not know what you’re looking at…480v is the RMS voltage, but it really doesn’t have much to do with this.
This is an arc flash label. It tells you how big a boom a piece of electrical equipment can make.
It is based on many factors, not just voltage, power, and amperages. It factors in equipment sizes and gaps, locations in the system, etc. to generate a model of how much boom it can go.
https://e-hazard.com/how-arc-flash-energy-is-calculated/