What rule have I violated to close the topic? One of my post with HRG was closed without allowing participants to comment first. We have to be open minded and Let's have an attitude to be open and let others prove us wrong. I am always open to be proven wrong with enough evidence.
He was already told that in this thread from 2008
Most of us here know what a corner ground is. The use in this area is Ag irrigation. Wet, poorly maintained. Many dating back to the 50s. VD does come into play. Electrocution is no different with the corner ground than a single phase service if the low parameter is 48V.
There are substations with low voltage as secondary. 1.5MVA 34.5 primary and 240 volts secondary. Same design criteria in IEEE 80 applies to prevent electric shock on touch and step potential inside the substation. Short circuits have high current approaching 100KA depending on the source substations. Earth is always considered conductor and the object is to reduce the resistance of the earth in the substation to lower step potential. For the meantime, I want to concentrate first with my first illustration so we we can step by step illustrate EGC and connection to earth.
AGREE. and should be connected to earth that will serve as the zero potential to prevent electrocution. Not connected to earth is dangerous or connected to some conducting body that serves in replacement to the earth.
The voltage use in calculation in IEEE 80 is to lower touch and step potential to 50 volts or less.
BAck read first. Be open minded first. What you know may be wrong. Or I may be wrong. 240 volts or 120 volts is still high and may cause electric shock or electrocution. BACK READ and seem my first exhibit and discussion with Senior member Mr. Petersonra
In these cases IEEE80 applies because of the 34.5kV and that it is open air exposed conductors. An industrial unit substation, where the primary and secondary are both metal enclosed and close coupled is not subject to IEEE80 even if it is installed outdoors.
Have you "back read" the thread from 2008? Why would you think LV and MV rules have changed since then?
Let's stick first to my first exhibit then I will prove later. Please back read. Let's discuss again same discussion with Mr Petersonra.
Lets discuss one issue at a time so we can have a conclusion. See attachment because you don't want to back read concentrate with this post so we will have a direction.
The secondary voltage is low voltage and touch potential and step potential are based on resistance and current. The short circuit line to ground fault in low voltage is very high. With high current and resistance of the ground step potential is also large. However let's discuss one case at a time so we can explain the purpose of connecting to earth and EGC.
Let's discuss one issue at a time. Attached is my first exhibit illustration.
This has been answered multiple times over multiple threads.
I wonder why you don't want to back read the discussion with Mr Petersonra.
Refer To your post #14.
It will be difficult if you don't what to discuss this topic one illustration at a time. Let's resolve it one issue at a time. I have discuss this with Mr. Petersonra and he already agreed.
You are not answering. I have provided my thoughts with our discussion with Mr Petersonra. Howver you don't want to read
