3 phase wiring - cable advice Pls.
I have 3 phase power on in my shed, a sub board, 1 x 32 amp outlet and switch (plus a single x 2 outlet single phase power point).
No lights etc yet.
This 3 phase outlet runs my Robland X31 combination machine.
Since then I bought a 5 hp, 3 phase H & F style twin bag dust extractor!
It has a very short 3 phase lead with a 20 amp plug on it, and it is on the opposite side of my 6 meter wide shed to my power sub board and existing 1 and only 32 amp outlet!
So in essence while I have a dust collector, I can't use it yet, at the same time as my machine that's making the dust! :no:
I managed to find a 20 amp outlet and switch second hand on gumtree for $20, that would suit the dusty - so grabbed it.
Now I intend tomorrow to go to Bunnings and BUY the cabling & corrugated grey conduit & 32mm saddles necessary to run the 3 phase wire...from the sub board across the portal frame to the other side of the shed where the dusty is and where I will mount the outlet, when it arrives in the mail.
The run in from the street has 3 x 60 amp fuses from memory - the mains board has 40 amp rcd for the shed 3 phase?...(I think)...
The cable to the shed is 6mm^2, 4 core and earth and distance turned out to be a little under 30 meters from meter box on house into sub board.
Obviously I'm not going to hook this cable up myself... I will get a sparky in to do it - BUT, I want to save cost by sourcing my own cable conduit saddles and run it there myself to save labor and time and just get the sparky to connect the wires into the sub board when I can afford it. The sparky who put my power on - is away in Germany on holidays another couple weeks before he comes back and I want to have this done before he does if I can, so his time & effort to assist me is minimal.
So.. the distance is about 15 meters of cable required.
Questions:-
1. What spec cable (mm^2) do I buy for this 15 meter run across the portal frame from one side of the shed to the other?. (More 6Mm^2 - yikes that stuffs about $6+ a meter).
2. Do I need another 3 phase rcd thingy in the sub board (there's room for another 1 or 2 bye the looks) - or does he splice the wires into the existing one and it protects both outlets?. (If i need another, how many amps rating do I buy for this 2nd one)?
3. Is there anything different I need to know about pulling the wire thru the flexible grey conduit and affixing it with saddles and tek screws to the portal frame..or do I just copy what he's already done running it into the sub board and to existing outlet?
4. If I wish to have single phase power points on that opposite wall eventually as well, - do I need to buy that white 2 core and earth single phase power wire of a size capable of running say a 20 amp outlet, and run a length of that thru the same conduit at the same time... before I saddle it all to the portal frame...or just install a pull chord for now and pull some single phase wire thru later?
5. If I should run the single phase power wire now with the 3 phase one - what sort (specification) wire do I get and is it Ok to run it in the same conduit as the 3 phase wire or should it have it's own separate smaller dia corrugated conduit like the 1 only double power point outlet I have now next to the sub board has?
Just don't want to do anything the sparkys gonna larf at and make me pull it all down...and re do, coz I did it wrong.:B
It would be nice when he gets back, if he can check it over - connect one end into the sub board, and other end to the outlet and I'm good to go... so I am trying to save $ obviously... Coz he values his time about 10 times what he values mine at, when we do "swap labor" coz lectricians are so much smarter than other trades you know - so I have to minimize his time here, to be able to afford his genius skill set. :wink:
Later, I want to add a 3rd x 3 phase outlet @ 10 amps to run my little compressor....... but that's right next to my existing 32 amp outlet and the sub meter so not a big job like this run across the shed.
Also I still have to get him back at some point, to connect all my 8 double batten flouro lights up.
The costs seem never ending with this shed. (But at least I can bite it off in small chunks as i can afford it & I get time to think about where I REALLY want stuff) rather than pay out big and get it all done and then later regret not planning it better at the outset.
TIA.
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