Y
youngsparky1991
Been at a job to do some testing all okay but high impedance values. The main mdp is free with a tncs eartbing system and Sun boards are TT. As the tags suggests if vaules are higher than in the regs a tt system.should be protected with an rcd at the origin of the supply. In this case as the tt board is a sun board, would the eve be at the sun biard the the mdp panel. Using an mccb with rcd attatxment or earth leakage attatchmwnt I assume. I've dont no much about these panels so any help would be great, the mccb there at the moment does have a rest button and an attatchmwnt with a test button and adjustable dials. Is that and rcd or is that over current protection?
