The incoming primary electrical duct bank, which also entrenches the gas and cable lines, runs along the west side of the building and into two step down transformers. The primary duct bank has six 4” schedule 40 PVC conduits which 2 will be used for service. The incoming cable duct bank has four 4” schedule 40 PVC conduits which all four will be used. From the transformers the primary duct bank goes into a secondary duct bank and into the building’s electrical/telecommunications/cable room main distribution switch board (MDSB). The secondary duct bank encases eight 4” schedule 40 PVC conduits which 5 are used. The main service feed for the MDSB is 1600 ampere, 3 phase, 120/208 V, 38 KAIC rated. The physical size of the MDSB is estimated to be 90”H X 102”W X 28” D. The MDSB feeds into Meter Bank’s A, B, C, and D, and the House Distribution Panel (HDP). The four meter bank serves all functions that the condos require in the building.  Two meter banks share each feeder run up to there proper level. From there each condo gets fed a service of 125 ampere, single phase, 3 wire, and 120/208 V into there own panel board. The HDP services the elevator motor #1 and #2, HVAC, lighting and receptacles for all floors (other than the condos). The fire alarm panel is fed separately and controls the main sprinkler, elevator control panel, remote enunciator, and all life safety functions of the building. Overall the electrical engineers have designed this system to allow for some redundancy by having the primary duct bank only utilizing two out of the six 4” schedule 40 PVC conduits, the secondary duct bank only utilizing five out of eight 4” schedule 40 PVC conduits, and extra space and spares left on the circuit boards of emergency panels and condos. It is very important to do this because of the ever increasing growth of technology. If a building is able to expand and grow with technology the better able the building is to adapting to an ever constantly changing world.