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**Show Us Your Installs!!!**

Discuss **Show Us Your Installs!!!** in the Australia area at ElectriciansForums.net

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Spudnik

Right chaps,

Due to a few unavoidable issues, we have lost the original thread and pics etc.

Sorry about that!!!

So, if you want to re-upload your pics then great, if not, give us something new!


Cheers!!
 
Pics from a generator install I did last year for a well known clothes shop's HQ. Two of the SWA's are glanded into paxolene to prevent earthing issues as the three buildings all had different earthing systems. I don't understand the theory side of it. Just did what I was told. Sizes are (left to right) 120 4-c , 120 4-c , 150 4-c. Other images show time delay changeover switch , generator main switch and spreader box. Glanding into 12 * 12 trunking is no fun and glanding into paxolene is even worse. A case of do all the dead testing then close your eyes for the big switch on! Can't remember the kVA of the genset. Something like 150kVA i think but im only guessing
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Sorry this is probably me getting this completely wrong and will happily be corrected, but the first pic of the main switch on the gen, would there be a potential for eddy currents with all those single cores going through the gland plate separately? Or are those black cut lines or sharpie ones for marking out. Nice to see some big stuff. :)
 
Last edited by a moderator:
You're right about the eddy current issue. They're cut lines not pen marks. However, the lockrings on the stuffing glands are steel. I mentioned it at the time but was told it's not a problem. I think it is though and would have preferred to have been using nylon / PVC stuffing glands. Again, I was told to just use what I was given and not keep asking questions!
 
You were right to raise the issue. When the Genny is running, those locknuts will heat up, in some cases they can go cherry red! This can cause the sheath on the cable to melt, and expose copper, which will cause a short circuit!
Brass locknuts should of been used, or as you suggested, use plastic Stuffers.
As for isolating the earthing for each building, how will the earth fault protection work for the buildings?
 
You're right about the eddy current issue. They're cut lines not pen marks. However, the lockrings on the stuffing glands are steel. I mentioned it at the time but was told it's not a problem. I think it is though and would have preferred to have been using nylon / PVC stuffing glands. Again, I was told to just use what I was given and not keep asking questions!

thought they might be cuts and the pattern is right for reducing eddy currents :), I use sharpies so much now it looks identical to a Line drawn by one :). Personally I like double insulated tri rated singles for big stuff, in trunking with as you say large stuffing glands. You can only do what your told, been there too!. Quick pic and email it to yourself for a timeline and a little note with your concerns bit of evidence gathering ;).
 
Johnboy. I've honestly got no idea mate. I'm just a sparks. I assume that as the individual earthing arrangements for the buildings aren't disturbed / isolated they would work in the same way as if the local supply was being used not the genset. I.e down the CPC, through the main earth and down the DNO earth?

Pennywise ive got some other pics somewhere on my phone of a genset install in london. 1MVA though. All the cables were 300mm tri-rate (TQ I think it was called) in parallel or tri-foil. Much better job. Ally cleats, PVC stuffing glands ect. Same firm but different foreman. Gave me the correct stuff for the job. No arguing, no worries, loads of scrap!
 
Again, ...Your only seeing what the designer wants you to see!! lol!! He ain't gonna tell you about how the upstairs is going to stink to high heaven of kitchen smells that are going to raise up that opening!! Bloody disaster of a layout, when you stop and think about it, and got past how it Looks!! lol!!
 

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