Rules & Regulations

All design, work performed, materials and equipment supplied and installed will conform to the standards, regulations and bye-laws of the authorities having jurisdiction over the mechanical and electrical installations:-

(a) Energy Commission (Suruhanjaya Tenaga)
(b) Local Supply Authority (Tenaga Nasional Berhad & Telekom Malaysia))
(c) Fire Services and Rescue Department (Jabatan Bomba dan Penyelamat Malaysia)
(d) Department of Occupational Safety and Health (Jabatan Kesihatan dan Keselamatan Pekerja Malaysia)
(e) Department of Environment (Jabatan Alam Sekitar)
(f) Department of Civil Aviation of Malaysia (Jabatan Penerbangan Awam)
(g) Uniform Building By Law
(h) Chartered Institution of Building Services (CIBS)
(i) Illuminating Engineering Society (IES)
(j) Jabatan Telekomunikasi dan Multimedia Malaysia (JTM)
(k) Telekom Malaysia (TM)
(l) All other relevant authorities having jurisdiction over the scope of work concerned.

The following standards will generally be applicable to the design of the electrical systems. Where there is a discrepancy in the standards or requirements between two documents or between a document and the specific requirements of the local authorities having jurisdiction, the more stringent standard or requirement will be applicable.

(a) IEE Wiring Regulations (16th. Edition)
(b) Malaysia Electricity Supply Acts 447 (1990)
(c) Malaysia Electricity Regulations 1994
(d) Malaysian and British Standards (MS and BS)
(e) Malaysian and British Standard Codes of Practice (CPs)

Example of Scope of Works for Electrical Services

Below are the examples of Scope of Works for Electrical Services

a) Medium Voltage Distribution System
b) Low Voltage Distribution System
c) Standby Generator Set
d) Earthing System
e) Lightning Protection Installation
f) Light & Power Installation
g) Telephone System
h) Information Technology (ICT)
i) SMATV System
j) PA System
k) Security (CCTV System / IP Camera and Card Access System)
l) Parking System
m) Sound Reinforcement System
n) SMS System
o) External Lighting Installation
p) SMATV System

CALCULATION FOR EARTHING CABLE OF TRANSFORMER

Earth Fault Current = Rated Current / Impedence
where Rated Current = Rated KVA / (Rated KV x 1.732)


Example : 1600KVA TX , 11/0.433KV, Impedence : 6


--> Earth Fault Current = [1600KVA / (0.433 x 1.732] / 6
= 355.57A

Note :
To refer to catalogue to choose which size of cable that can carry 355.57A

Study Report 1 : Upgrading of Electrical Supply

1. Introduction:

To check the effect of load increase due to the new equipment to be installed in the factory

2. Reference Document:

a. as built drawings

b. latest electrical bill

c. on-hands information by the client's representative

3. Current installation:

a. Single chamber sub-station with 1000KVA Transformer

b. Current size of ACB is 1000A TPN with 1600A Busbar

c. Current MD is 600A

4. New Installation:

a. New equipment (MD = 720A)

b. New a/c load (MD = 86A)

5. Maximum Demand Load Analysis:

a. Future MD (A) = Current MD + New MD

= 600A + 720A + 86A

= 1406A

b. Future MD (KW) = 860KW

c. Future MD (KVA) = 1012KVA

6. Conclusion:

a. New load cannot be catered by existing TNB sub-station

b. Application on new load / increasing of the current load need to be submitted to TNB

c. New MSB need to be installed to cater for future load / to upgrade the existing MSB (1000A TPN ACB to 1600A TPN ACB)

Forms of Assemblies - FORM 4 (Part 4)

Note:
The above Form Code have been tabulated based on IEC 439-1, Part 1, Clause 7.7 - FORUM

Forms of Assemblies - FORM 3 (Part 3)

Note:
The above Form Code have been tabulated based on the IEC 439-1 Part1, Clause 7.7 - FORUM

Forms of Assemblies - FORM 1 & 2 (Part 2)

Note :

The above Form Code have been tabulated based on the IEC 439-Part 1, Clause 7.7 - FORUM