7/30/2019 20080124 Tamar (Common Facilities) Rev F2

1/2

J. Roger Preston Limited

Design and construction of TAMAR development project Central, Hong Kong

Loading Estimation for General Power and Lighting at Common Facilities

Sheet 1 of 2

Floor Usage Area (m2) Loading description Loading (kVA) Loading (kVA)B/F Street Hydrant pump room 157 Lighting 0.63 0.16

Small power

1.57 0.00Street Hydrant water room 196 Lighting 0.78 0.20

Small power 1.96 0.00Service duct room 54 Lighting 0.22 0.05

Small power 0.54 0.00L/F Water pump room 253 Lighting 1.01 0.25

Small power 2.53 0.00Communal Area (e.g Corridor) 51 Lighting 0.20 0.05

Small power 0.05 0.00G/F Plant Room 1757 Lighting 7.03 1.76

(Transformer Block) Small power 17.57 0.00

Communal Area (e.g Corridor,

Vehicular access)4562 Lighting 18.25 4.56

Small power 4.56 0.00

Lighting Small power28.12 28.78

7.03 0.00Total Load

Remark : No requirement of ER for about the dedicated LV switchboard and transformer for Common facilities. It shall be shared with Open space

Total Essential Power

Normal (no genset backup) Essential (with genset backup)

Total Normal Power

7/30/2019 20080124 Tamar (Common Facilities) Rev F2

2/2

J. Roger Preston Limited

Design and construction of TAMAR development project Central, Hong Kong

Summary of Loading Estimation for Tamar - Common Facilities Sheet 2 of 2

ITEM Description Loading (kVA) per unit Quantity Diversity factor Loading (kVA) ITEM Tx. 18

1.1 Lighting Installation 35.15 1 0.85 29.88 1.1 29.88

1.2 General Power and other fixed equipment 28.78 1 0.80 23.03 1.2 23.03

3.1 Cleansing Water Booster Pump for Podium 0.50 1 0.80 0.40 3.1 0.40

3.2 Flushing Water Booster Pump for Podium 0.50 1 0.80 0.40 3.2 0.40

3.3 Sump Pit Pump 18.00 11 0.80 158.40 3.3 158.40

3.4 Subsoil Sump Pump 2.00 16 0.80 25.60 3.4 25.603.5 Waste Water Sump Pump 2.00 14 0.80 22.40 3.5 22.40

3.6 Carpark Waste Water Sump Pump 4.00 20 0.80 64.00 3.6 64.00

3.7 Cleansing Water Booster Pump for Podium 0.50 1 0.80 0.40 3.7 0.40

3.8 Flushing Water Booster Pump for Podium 2.35 2 0.80 3.76 3.8 3.76

Mechanical Services 3 - MVAC

3.9 Refuse Collection Ventilation Fan 8.90 2 1.00 17.80 3.9 17.80

4 Loading & unloading Ventilation Fan 8.90 2 1.00 17.80 4 17.80

4.1 Ventilation Fan for Genset Room CCP 13.00 2 0.00 0.00 4.1 0.00

4.2 Street Hydrant pump 1duty and standby 155.00 1 0.00 0.00 4.2 0.004.3 Street F.H.Jockey 1 duty 8.90 1 0.00 0.00 4.3 0.00

4.4 H.R.1 duty and standby 5.00 1 0.00 0.00 4.4 0.00

4.5 H.R.1 duty 3.50 1 0.00 0.00 4.5 0.00

5 Automatic Refuse Collection System 396.00 1 0.80 316.80 5 316.80

Total Load Demand 680.67 Sub-Total 680.67

Percentage 45%

Remark : No requirement of ER for about the dedicated LV switchboard and transformer for Common facilities. It shall be shared with Open space

Automatic Refurse Collection System

General / Office lighting and small power

Mechanical Services 2 - Water Pumps

Mechanical Services 4 - Fire Services Installations