Dubai Building Code
Where two ECCs are used, the ends of the ECC shall
be terminated independently of each other at all
connection points throughout the circuit, the DBs,
junction boxes and socket outlets. To achieve this, an
accessory shall be provided with two separate earth
terminals.
Where the cable incorporates metallic armouring, this
shall be clamped to the cable gland. The main earth
conductors shall be placed such that the metallic cable
sheaths can be reliable and readily connected to it by
bonds made to the cable gland.
Part G: Incoming utilities
Sr. No.
Circuit/equipment/apparatus
Rated operating
current (mA)
1
13 A switched socket outlets
30
2
Water heater/coolers/dishwashers
30
3
Refrigerator/washing machine and
similar apparatus
30
4
Domestic water pumps
30
5
Jacuzzi pumps
10
6
Under water lighting
10
7
15 A switched socket outlets
(general purpose)
30
Earthing conductors shall be accessible for the
connection of any detachable earthing devices used
with the electrical equipment.
8
General lighting
30/100
9
Flood lighting
100/300
10
Window/split type air conditioner
100
G.4.19.4
11
Fan coil/AHU/VAV
100
12
Package type air-conditioning unit
100/300
13
Chiller
100/500/1,000
14
Irrigation pump
100
15
Electric cooker
100
16
Industrial machine
100/300
17
Elevators/escalators/hoist
300/500
18
Neon sign
300
Earth leakage protection
Earth leakage protection shall be designed and
incorporated in consumer installations in accordance
with BS EN 61140 and IEC 61140.
The ELCBs/RCCBs shall generally conform to
BS EN 61008-1 and BS EN 61009-1. Recommended
values of operating current of ELCBs/RCCBs are
specified in Table G.21, though the designer shall verify
with the manufacturer’s recommendations.
G 63
Table G.21 Recommended value of operating current for ELCB/RCCB in
consumer installations
NOTE 1: Grouping of circuits under one ELCB/RCCB
is permitted for lighting circuits, general purpose
switched socket outlets, single-phase equipment/
appliances, etc. The maximum number of circuits
proposed under each group should be selected taking
into account the building type and the possible
interruptions.
NOTE 2: Wherever an uninterruptable power supply
is required to provide power to equipment and
circuits as part of a fire protection system (such as
fire pump, jockey pump, sump pump, sprinkler pump,
pressurization pump, smoke extract fans), a suitable
earth leakage detection system with indication and/or
alarm should be provided.
For industrial installations that are designed with
common operating systems for plant and machinery,
the earth leakage protection shall be selected taking
into account the safety and operational requirements.
Operation of the ELCBs/RCCBs, earth leakage
detection system, etc. shall be periodically checked
and tested in accordance with the manufacturer’s
recommendations to ensure consumer safety.
Earth leakage sensors/relays with alarm/indicators
shall be provided for fire pumps, jockey pumps,
submersible pumps, sump pumps, or other essential
circuit/equipment with sensor settings that allow
for pre-fault warning notification and fault warning
notification.