This practical checklist guides electricians through performing a Super Immunised RCBO upgrade on NBN FTTN sites. It covers site identification, utility details, HSE pre-start, supply isolation and battery backup checks, rewiring to NBN-CON-TIB-3374, replacing the RCBO, and completing required testing. Steps include energising and verifying supply, updating and photographing schematics, capturing switchboard and changeover switch images, notifying FTTN NOC, and preparing artifacts for submission. It concludes with electrical inspection, certificate capture, and technician sign-off.
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