Fault Finding on a Ring Final Circuit How to find fault on a ring final circuit sometime called a ring circuit or ring main. Using a Megger MFT tester Marcus sets about finding an open circuit after carrying out stage one testing end to ends. Marcus show you how to split the ring circuit into 2 radial circuits and then test each leg until you find the faulty socket is identified. Please note there are many different ways to find this type of fault... Electrical fault finding 🔵 How to Test a Rin