X and R Values
X and R Values
(OP)
Is there a way to find the X and R values for 600 volts,THHN cables installed in a single and three phase circuit configuration. I need to do a voltage drop calculation but I am not sure if I can find such information in the NEC or any where else. Please advice and thank you in advance






RE: X and R Values
RE: X and R Values
ht
"The perfect is the enemy of the good." -- Voltaire
RE: X and R Values
http:
This page for Voltage loss:
http://w
Hope this help.
RE: X and R Values
xnuke
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RE: X and R Values
VD = R·cosØ + X·sinØ
RE: X and R Values
xnuke
"Live and act within the limit of your knowledge and keep expanding it to the limit of your life." Ayn Rand, Atlas Shrugged.
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: X and R Values
Those are guides. You can come calculate on your own and may want to compare your values with the table 310.16. As David said, there are other variables to consider and each calculated value differs depending on the things factored in.
RE: X and R Values
The NEC 2005, Table 9. provides information for Alternating-Current Resistance and Reactance for 600 volts Cables, 3-Phase, 60 Hz, 75 degrees,- Three single conductors in conduit. This information can be utilize to calculate the voltage drop for 600 volt cables by using VD = R·cosØ + X·sinØ with a given power factor. However, I am in search of finding the X and R values for a single phase system at 90 degrees temperature for the conductor. Similarly, I would like to know which standard in the IEEE or ICC has a variety of information for the X and R values for different voltage configurations and temperatures for the conductor. Primarily, low and medium voltages for single phase and three phase systems for distribution systems. The distributions systems here are said to be from 5 to 35 Kv. Please advice and thank you in advance
RE: X and R Values