17th edition 2008 vs 17th edition 2015 VD query

[atm84]

Does anyone know if the mv/A/m values for cables have changed since 17th edition came out?

I did a cable calculation back in 2009 on Amtech Prodesign and when I resisted the calculation and opened it in Amtech 2015 version the VD had reduced. Albeit marginally however no other cables on the system had been changed. Seems odd. I haven't checked The BYB yet as I don't have a copy to hand so wondered if anyone else knew.


Sent from my iPhone using Tapatalk

 

[Flanders]

No the mv/A/m are the same i have just checked between the 16th and 17th addition , the only thing that as changed is thei Cim correction factors but that is do with calculating the max Zs

 

[Andy78]

No the mv/A/m are the same i have just checked between the 16th and 17th addition , the only thing that as changed is thei Cim correction factors but that is do with calculating the max Zs

What did change was the maximum permissible volt drop values. In the 16th it was a blanket 4%

 

[atm84]

Thanks for the replies guys. It's the difference between 17th 2008 and 17th 2008 (2015)


Sent from my iPhone using Tapatalk

 

[Risteard]

What did change was the maximum permissible volt drop values. In the 16th it was a blanket 4%

Remember that is merely informative.

 

[Andy78]

Remember that is merely informative.

I mentioned it because I thought it would have been built into the software and possibly caused a disparity. On re-reading the OP it seems I got the wrong end of the stick and the problem was to do with VD values for the cable.