The third-level distribution box needs to be sealed off

The structure (walls, ceiling and floors) should be fully enclosed and sealed without any breaches by wiring, pipework going through the structure, creating gaps. This includes the rear wall, side panels, doors, door handle a d ventilation grille with climate filter for the air intake. This would ensure that the electrical supply to the entire site can be shut off by activating this “shut-off” device. 228 hole in the barrier and through the 0. NOTE: If a Branch Neutral Lug Assembly is NOT Required, skip to Step 13. In addition to installing leakage protectors in the final switch box, a first level leakage protector should also be installed. is sealed off from the adjacent bays by gastight and arc-proof disc nnectors. A similar insulator seals off this chamb nitored by gas density relays. The switchgear hasA typical primary distribution substation would include air-insulated outdoor-type high-voltage side (HV) and a metal-enclosed air-insulated indoor-type medium-voltage switchgear (MV). Due to specific reasons, like space limitations, environmental aspects and security, the substation can be built.