Engineering notes
ELV materials in a cost plan
Split cameras, access, LAN and public address from labour. Disk days, PoE watts, exit-door power.
Hardware lines the labour lump hides
An ELV quotation that is one number per square metre hides missing disks, a short PoE budget and exit doors without standby power. Split the equipment list: cameras and recorders; doors and locks; switches and racks; loudspeakers and amplifiers.