Its not one i installed. Thats just an image i pulled of google purely to show the workings and how little is inside. They come ready assembled and its the whole thing about manufacturers instructions... If they have designed it in such a way can we then change it?? I also noticed the cpc is part of a 3 core. So either they have tt set up. Or confirmed with dno its tns and will not go to pme... Otherwise if its pme you have to risk assess it. If in doubt put it on a rod.