OK Dan you want to step up to the plate and surprise us or do you just want to keep on saying the same thing over again?

Put some figures down to prove your point. [Linked Image]

Please demonstrate the 'major effect' ambient temp has on VD using an example.

A branch circuit, straight 240 volt, single phase, 100 amp load current (a unit heater), 200' one way length run in PVC.

What size copper conductor do I need to stay under 3% drop at 100 F ambient.

Now the same circuit in an ambient temp of 0 F.

Is there a significant difference?

Will we be surprised?

Bob


[This message has been edited by iwire (edited 09-26-2005).]

Bob Badger
Construction & Maintenance Electrician
Massachusetts