6a: current flow is very low.
6a: current flow is very low.
50A?
We have the same 12KV loop. We also have some big new switchgear and some big old fused switchgear. We have a dedicated feed from utility substation. I had a tour of the substation one time and found out we were only drawing 6-8 amps on the #4's
Little wires in / big wires out.
Basically the current flow is very low.
Co-ordination studies should be in place for one scenario or another and you should conform to the studies.
Best practice IMO is to leave the loop open at the most convenient switch. For example we have some four position sectionalizing switches that need a shotgun stick and are more difficult to throw than a handle. I leave one of the handles open better. But the 4pos $ is a better place to park the boots if you want to really dead end, cap test or lock out the power for vault work.
As an aside, I had an Irish guy working for me years ago and he told me in Ireland that all residential cts were wired up in a loop.
That is, the power went out and around and the ct came back and landed under the same screw. You can wire up alot more load like that as the current flow is generally lower. In fact, in Ireland, he said, you can wire unlimited res outlets under a 20a whatever their voltage is.
It's kind of like wiring up some garden lights and putting the xfmr in the middle and then looping back and around.
That will basically give you half the flow each way as the power searches out the easiest way home.