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ADDC and DEWA

The document discusses electrical power distribution standards for a building. It specifies requirements for nominal voltage, power factor, fault current, earthing systems, incomers, automatic transfer switches, distribution boards, and lighting circuit protection.

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Jason Secret
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396 views2 pages

ADDC and DEWA

The document discusses electrical power distribution standards for a building. It specifies requirements for nominal voltage, power factor, fault current, earthing systems, incomers, automatic transfer switches, distribution boards, and lighting circuit protection.

Uploaded by

Jason Secret
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLSX, PDF, TXT or read online on Scribd
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ADDC

Power
Single Phase Voltage 230V, Three Phase 400V
Nominal Voltage Shall be Kept +10% and -6%
Frequency 50HZ
Power Factor 0.9 to Unity
Maximum 3 Phase Prospective Fault Current at LV Shall be 46KVA
(1 Second)
Earthing System
Earthing system is TN-S & TT
for Supplies above 500A rating above at least two independent
earth electrodes must be provided
Incomer
ACB/MCCB-3 Poles
All Panel are type tested & ADDC/ ADQCC Approved type test
panel to be used
ATS

The changeover circuit breaker shall have 4 poles for a 3 phase


generator and 2 poles for single phase generator, to ensure that
all live and neutral conductors are disconnected at the same time
Distribution Board
12 Ways single phase and 42 ways for three Phase
How ever the construction for the Panel are different form DEWA
Regulation
ELCB are Separate to MCB
ELCB 30ma using for Power
ELCB 100ma using for Lighting
Lighting Circuit

As per ADDC Clause 9.32/A: All Final Circuits ( Including Lighting,


Water, Heater, Extract Fan, etc) Must be protected by RCB of
Current Rating 30 ma and complying with BS EN 61008 (Wet
Areas, Bathroom Area)

Fan Coil Units mounted in a ceiling void in a bathroom may be


provided with 100ma RCB protected
Lighting Circuit
DEWA
Power
Single Phase Voltage 230V, Three Phase 400V
Nominal Voltage Shall be Kept +-10%
Frequency 50HZ
Power Factor 0.9 to Unity
Maximum 3 Phase Prospective Fault Current at LV Shall be 40KVA
(1 Second)
Earthing System
Earthing system is TN-S & TT
for Installation with main incomer 200A and Above, Minum of 2
earthpit shall be provided
Incomer
ACB/MCCB-4 Poles

IEC 61349 type tes panel are accepted

ATS
The changeover circuit breaker or isolator shall habe 4 poles for 3
phase supply and 2 poles for 1 phase supply to ensure that the
phases and neutral of the 2 systems remains separated and
distinct
Distribution Board
12 Ways single phase and 42 ways for three Phase
How ever the construction for the Panel are different form ADDC
Regulation
RCBO is a combination of ELCB and MCB

Lighting Circuit

All Lighting circuits protected from 100ma RCB/ELCB protected

Lighting Circuit

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