500 MCM cable

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james wuebker

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Location
Iowa
Last week I pulled some 500 MCM cable and used my 500 mcm cable strippers. This week I pulled more 500 mcm cable. I tried to use my stippers but wouldn't work. I had some of the week before 500 cable and compared them. The first cable looked much larger in Dia. than the second pull. I counted how many wires were in each and there were 37. I measured them and found that the smaller looking cable wires were .005 small per wire than the larger 500 mcm. The thing that made me upset is that I couldn't use my nice stippers on the smaller cable even tho it was 500 mcm cable. Are the companys trying to make this cable a little smaller to make more money? Has anyone notice this yet in the cables?

Jim
 
Electrofelon, Both pulls were about 160' with regular 500 mcm THHN wire. Pulled 2 sets the first week. The next week I had to buy more wire for the second pull. That's when I notice it. Haven't talked to the salesperson who sold it to me yet but want everyone to have heads up on this.
Jim
 
Electrofelon, Both pulls were about 160' with regular 500 mcm THHN wire. Pulled 2 sets the first week. The next week I had to buy more wire for the second pull. That's when I notice it. Haven't talked to the salesperson who sold it to me yet but want everyone to have heads up on this.
Jim
 
I'm looking at my Rome cable Technical Guide to wire and Cable and concentric stranded class B 500kcmil w/ 37 strands, each strand is .1162" dia. The OD is .813"
However, there is some other stuff out there that is smaller in diameter. I found this at : http://www.markelcorporation.com/material17.html

"In a concentric stranded conductor, each individual wire is round and considerable space exists between wires. In a compressed conductor, the conductor has been put through a die which "squeezes out" some of the space between wires. In a compact conductor each wire is preformed into a trapezoidal shape before the wires are stranded together into a finished conductor. This results in even less space between wires. A compact conductor is, therefore, the smallest in diameter (except for a solid conductor, of course). Diameters for common conductor sizes are given in the table below. (Sources: ASTM B3, B496 and ICEA S-66-524)"

 
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