325m Run Of Underground Power To Get 240v At The Other End? - Electrical - Page 2 - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical


Thread Tools Display Modes
Old 07-17-2012, 06:39 AM   #16
Join Date: Jul 2012
Posts: 4
Rewards Points: 10

Thanks "AllanJ" you the man!!! Cheers


Farmer steve is offline   Reply With Quote
Old 07-17-2012, 09:12 AM   #17
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 7,971
Rewards Points: 1,548

For futureproofing, given the effort to dig the trench for the cable or conduit, you might want to install a size of wire to handle the maximum number of watts (translate back to amperes at 480 volts) the transformers can handle.

Don't forget that if you don't have a continuous length of wire and need to splice somewhere in the middle, you need an exposed junction box.
The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.
AllanJ is offline   Reply With Quote
Old 07-17-2012, 12:25 PM   #18
" Euro " electrician
frenchelectrican's Avatar
Join Date: Apr 2006
Location: WI & France { in France for now }
Posts: 5,369
Rewards Points: 2,000

The other thing I will add into this posting as well.,

If you going to upstep to 480 volts with two transfomers you will have to treat them as sds plus you will have to bond one leg right after each transfomer unless the second one is 480X120/240 volt set up then bond the centre tap of that second transfomer.

And make sure you mark a warning sign that you have 480 volts in that conduit to warn someone else in case they look at the system.

The answer will be based on NEC ( National Electrical code ) or CEC ( Cananda Electrical code ) or ECF ( Electrique Code France )
frenchelectrican is offline   Reply With Quote
Old 07-17-2012, 01:10 PM   #19
Semi-Pro Electro-Geek
Join Date: Jul 2009
Location: Arizona, USA
Posts: 3,045
Rewards Points: 2,990

Originally Posted by Farmer steve View Post
Tried Solar not efficent for the km I have to run plus The energizer in not Solar equiped
The easy solution to that is to break up the fence into 2-3 sections and use more than one fence charger. But if you insist on using the fence charger you've got already, you would still be better off running it off solar power than burying that much cable. You could install a couple hundred watts of solar panels, a couple car batteries, and an inverter to run the fence charger for way less money than burying a 325m cable.
mpoulton is offline   Reply With Quote
Old 07-17-2012, 10:47 PM   #20
Join Date: Jul 2012
Posts: 119
Rewards Points: 75

Farmer Steve.
Being a farmer you must be busy, so I'll just give you the summary of the calcs. (Note: one important (yet missing) piece of information is whether you will be using a three-phase, or a single-phase transformer? So, I did the calcs. on both. Note: there are 20 amp calcs., 16amp calcs. and (accademic) 10amp calcs. (In my opinion you ought to use the 20amp calcs.). Here are the results:-
(1). 480v 3-phase 20A PVC cond. (3.8% vdrop = #6 AWG Thwn Cu.) ( Note: you oughtn't incur more than 3% vdrop, but this is close...as been as the load is only going to be 10A, but remember - the potential load is...20A).
(2). 480v 1-phase 20A = 2.8%VDrop = #4AWG Thwn Cu.
(3). 480v 3-ph 16A = 3%VD = #6AWG Thwn Cu.
(4). 480v 1-ph 16A = 2.2%VD = #4AWG Thwn Cu.
(5). 480v 3-ph 10A = 3%VD = #8AWG Thwn Cu.
(6). 480v 1-ph 10A = 2.2%VD = #6AWG Thwn Cu.
Summary: Use either #1, or #2 above.


kontoose is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Power 120V Pump from a 240V circuit RoberTX Electrical 26 07-05-2011 11:43 PM
240v questions.... ITSANSS Electrical 16 05-11-2011 05:40 PM
house power supply upgrade in Australia pcd1965 Electrical 3 08-22-2009 08:17 PM
Wring for Lincoln Power Mig Welder vstoyko Electrical 17 01-15-2009 06:15 PM
Partial power on same fuse! joyjam Electrical 5 07-10-2005 10:23 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1