Royal Park, Bhukum, Pune

A residential township at Bhukum, west of Pune, built in phases: Phase I of two wings (A1 and A2, 100 homes), Phase II of six buildings (B1 to B3 and D1 to D3, 300 homes), Phase III of five buildings (C1 to C3, E1 and E2, 302 homes) and a MHADA building of 54 homes. That is 14 buildings and 756 homes, 582 two-bedroom and 174 three-bedroom, for about 3,780 residents at five to a home, with 30 lifts, 719 car bays, an amenity plot and landscaped gardens. Most parking is underground: Wings A1 and A2 stand on two basement levels, a ground floor and 13 upper floors, which is 16 concrete slabs through which every electrical conduit has to run. The structure, floor plans and the six-metre internal roads are the architect's. Our work is everything that has to be calculated, sized and provided inside them: the electrical load and supply, water, sewage and fire systems, air in the basements and stairs, charging for electric cars, and the lighting, alarms and cabling cast into the concrete.

We started with the numbers, because every system in a township this size hangs on them. Electrical load: every home loaded at 75 W per sq m of carpet area, plus 30 lifts and the common lighting - 5,884 kW connected and 3,012 kW after diversity, which is 3,347 kVA at 0.9 power factor and 4,017 kVA with a 20% margin for the transformer rooms. Charging for 20% of the 719 car bays, 144 chargers of 7.2 kW, adds 1,035 kW connected and is the second-largest load after the homes. Water: 135 litres per person a day for 3,780 people, 510 kL a day in all, with underground and terrace tanks for domestic, drinking, flushing and fire water, and a sewage plant that returns treated water to flushing and the gardens (Phase I: 67.5 kL a day, a 70 KLD plant). Fire and dewatering: hydrant and sprinkler pumps of 2,850 lpm at 105 m head with a jockey pump, and basement sumps sized for 30 sprinklers discharging for ten minutes, 17 kL for every 3,000 sq m fire zone. Air: basement ventilation at 6 air changes an hour for fresh air and 12 for exhaust, doubled in fire mode, with ducts sized at 12.5 m/s, and stair and lift-well pressurisation held at 50 Pa. Basement electrical: the fixture and conduit layout for the second lowest level of Wings A1 and A2, set out so it can be repeated on all 16 slabs - about 70 numbered light points in a timer group (6 pm to 11 pm) and an always-on group, from a lighting control board with a 40 A four-pole supply, a 30 mA residual-current breaker and a 40 A contactor with a manual override; fire alarm detectors, speakers, telephone jacks, call points and hooters on their own 25 mm conduits; CCTV conduits; flame-retardant copper in concealed conduit with a 15 mm gap between conduits and points marked before the pour; and 775 x 200 and 850 x 200 mm cutouts through the first slab, revised as the architect's and structural layouts changed and issued in September 2026.