Alternatively, an energy efficiency method introduced by the Code could also be used for preliminary cable sizing. This energy efficiency method for cable sizing requires the calculation of themaximum allowable conductor resistancebased on the maximum copper loss requirement as stipulated in the code. F...
Good Cable Insulation When voltage is impressed across any insulation system, some current leaks into, through, and around the insulation. When testing with DC high-voltage, capacitive charging current, insulation absorption current, insulation leakage current, and by-pass current are all present to ...
A common approach to test cable and determine insulation integrity is to use a hi-pot test. In a hi-pot test, a dc voltage is applied for 5 to 15 min
Success in locating or tracing the route of electrical cable and metal pipe depends upon knowledge, skill, and perhaps, most of all, experience. Although locating can be a complex job, it will very likely become even more complex as more and more underground plant is installed. It is just ...