Fitness Centre, Ravet

A modern fitness centre of about 1,000 sq m in Ravet: a gym floor with nine treadmills and a powermill, spinning and group-exercise studios, ladies' and gents' changing rooms with steam and sauna rooms, a reception and waiting area, a cafe with a kitchen, two director's cabins, an accounts room, a conference room and an open terrace, served by two lifts and a fire stair. The building is air-conditioned throughout, hot water and steam for the changing rooms are electric, and the treadmills must not stop with the grid. The electrician needed a clear single-line diagram, a panel room location and distribution boards for each use, and the owner needed to know the supply to apply for and the standby set to buy.

Load: we worked the load up in January 2026 at 137.7 kW and revised it in March to 160.3 kW when the treadmill load of 27 kW was added - HVAC 70 kW, treadmills 27, steam 24, lighting 11.3, heat pump 10, power points 10, miscellaneous 5 and audio-visual 3 - with a maximum demand of 128 kW at 0.8 diversity. Supply: MSEDCL power comes in on a 3.5-core 185 sq mm aluminium armoured XLPE cable to a 320 A four-pole MCCB at the meter room, through a 320 A automatic transfer switch with over- and under-voltage protection and manual override, to a 400 A distribution panel with eleven feeders: lighting, power, treadmills, HVAC indoor and outdoor units, two steamers and a heat pump, plus a surge protection device. Standby: a 160 kVA diesel set with an automatic mains-failure panel, sized from 160.3 kW at 65% diversity - 105 kW, 130 kVA, 156 kVA with a 20% margin. A 30 kVA online UPS with 15 minutes of backup carries the treadmills (27 kW, 21.6 kW at 0.8, 28.8 kVA with margin). A 40 kVAr automatic power-factor panel in six stages corrects the lagging load. Floor: lighting, power and HVAC distribution boards with 30 mA earth-leakage protection on every circuit, 6/16 A sockets for each area, a dedicated 16 A switched socket for each of 18 air-conditioning units, UPS and raw-supply sockets at each workstation, and 100 x 50 mm and 200 x 50 mm cable trays. The layouts were issued in January 2026 and the main power schematic in February, revised in March and May as the panel location moved.