Hi guys the name is Clint, I'm very new here but after reading through the majority of the posts here I'm confident that this is the place to ask.

I'm writing installation rules paper 2 tomorrow, during my studying I've come across 2 variables in the PSCC Calculation in the memos. Now it's not that I don't understand the calculation. I'm just not sure which of the memos are correct.

When calculating a Three phase PSCC some memos make use of Ztotal=Zconductor+Ztra stormer. While others include Zecc in the Zt.

There's a common question that shows its head quite often especially the 3 phase one. I don't want to be studying the wrong thing it's 10marks down the drain almost.

Hoping somebody can clarify this for me before I write my exam