You may not know that the National Electric Code doesn’t make complying with its voltage drop criteria mandatory. But there are still some important design factors that you need to keep in mind . . . . Continue reading “The importance of limiting voltage drop”
Category: Sizing cable
Articles here are about how to size cables.
Voltage drop
Voltage drop is a basic skill required for every electrical engineer in the nuclear power industry. Here’s a summary of how it’s calculated. There are also references to relevant National Electric Code articles . . . . Continue reading “Voltage drop”
Cable temperatures and physics
It’s helpful to be reminded of the basic physics underlying the basis for the temperature rating of conductors . . . .
A five-step cable sizing procedure
There are numerous ways to go about doing this. Here’s one that is sure to work. It’s concise: five steps . . . . Continue reading “A five-step cable sizing procedure”
Cable temperature ratings – it’s all about the insulation
Cables can be purchased that are rated for different temperatures. The three most common conductor temperature ratings are 60ºC, 75ºC, and 90ºC . . . . Continue reading “Cable temperature ratings – it’s all about the insulation”
Derating cable ampacity – count the ground or neutral?
Here are three common scenarios that you need to keep in mind when sizing a new cable. Its ampacity will have to be derated depending on how these three factors apply to you . . . .
Continue reading “Derating cable ampacity – count the ground or neutral?”
Basic cable sizing and ampacity determination
This is one of the first things an electrical engineer in the nuclear power industry will probably do: sizing a cable by determining, among other things, its ampacity. . . .
Continue reading “Basic cable sizing and ampacity determination”
Introduction to cable insulation designations
Cable insulation is often known to nuclear electrical engineers by an industry shorthand. The different shortcodes describe different materials and properties. Here you can learn where to find the decoding cipher . . . .
Continue reading “Introduction to cable insulation designations”