Most businesses in Nairobi have three or four vendors touching the same wall: one ran the cabling, one installed the inverter, one fitted the cameras. Each did their job. None of them designed for the others.
The result is familiar. The cameras drop when the power switches to backup because the router was never on the protected circuit. The gate controller has its own battery that nobody checks. The Wi-Fi is strong in the boardroom and absent in the warehouse where the scanners live.
Planning the three together is not expensive, it is mostly a matter of sequencing. Decide what must stay on in an outage. Put those loads, including the network, on the backup supply. Then run the control and data cabling in the same trenches and trunking as the power. One drawing, one hand-over.
That is the case for one accountable team. Not because one company can do everything better, but because the hand-offs between vendors are where projects quietly fail.