Amperage drop/wire size

Reply

  #1  
Old 11-05-13, 12:07 PM
Member
Thread Starter
Join Date: Nov 2013
Posts: 1
Amperage drop/wire size

Need to figure amperage drop/wire size, on buried cable for 70 amps over 200 ft. Using aluminum. HELP!!
 
Sponsored Links
  #2  
Old 11-05-13, 12:47 PM
Nashkat1's Avatar
Member
Join Date: Mar 2012
Location: USA
Posts: 8,470
Welcome to the forums!

Amperage doesn't drop with distance. Voltage does. The conservative value is to limit the voltage drop to 3% or less. The calculation for the wire size needed to do that is based on distance, load and wiring method. The information we need is:
  • Is the distance from breaker to load exactly 200 ft?
  • What is the maximum load? So you need a foll 70A?
  • Are you planning to pull individual aluminum conductors in buried conduit, or some other method?
  • Is single-phase 240V correct?
 
Reply

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


Thread Tools
Search this Thread
Display Modes
'