Phase attriubute identification for large commercial building 1

[ShuOfAz]

What equipment or tool is rcommended or how does one identify which phase attribute a specific area in the building is on when the circuit is deep inside a commercial complex and without taking an outage.

 

[busbar]

One method is to use a voltmeter.

Another is with IEEE 1344 measurements.

Please be cognizant of the hazards associated with the first method.

 

[ShuOfAz]

Can you explain the voltmeter thought as the voltage at the source is much different than the voltage at the load

 

[busbar]

In that circumstance, it may not be practical or safe.

 

[jbartos]

Suggestion: Visit

http://www.davisontheweb.com/showl5.asp?L5ID=4&L4ID=17

and look for AMPROBE Advance Wire Tracer that allows you to trace energized conductors