12/05/2025
This original board was from a 4 year old rewire and board upgrade. The customer originally only asked us over to change some accessories. After testing the condition of the RCD at the end of the replacements, it failed. Popped back to replace and the circuits start tripping, pretty convinced it was dud when installed originally. After seeing the standard of install from brief visual inspection for such a new rewire we found the customer also never received certification for the works. Following an EICR we found a few errors such as no cpc continuity, high ring readings, reversed polarity, basic insulation on show and borrowed neutral.
We have upgraded the board with bi-directional RCBOS to better suit new solar regulations and provide surge protection and sorted the errors on the circuits and tidied up the mess of cables. The customer opted to have the heat pump installed into a separate DB to allow for Type B RCD protection as well.