Understanding Electrical Submission Requirements for Mall Work Permits
When carrying out electrical works in commercial buildings such as shopping malls, contractors are typically required to submit a set of technical documents before a work permit is approved. These requirements ensure that all installations are properly designed, safe, and compliant with local regulations.
Commonly requested documents and protections
1. Single Line Diagram (SLD)
A Single Line Diagram (SLD) is a simplified drawing that represents the electrical system layout using standard symbols.
It shows how power is distributed from the main supply to various distribution boards and final circuits. Key components such as main switches, circuit breakers, RCCBs, and cable sizes are typically indicated.
This document allows engineers and mall management to quickly understand the system configuration and verify that it is properly designed.
SLD commonly include a 10mAmp RCCB.
An RCCB (Residual Current Circuit Breaker) is a safety device designed to protect against electric shock caused by earth leakage.
A 10 mA RCCB is a highly sensitive type of protection, typically used in areas with increased risk, such as wet environments or locations accessible to the public. It trips quickly when leakage current exceeds a very small threshold, helping to prevent injury.
🛡️ 10 mA RCCB (Residual Current Protection)
2. Borang G & Borang H (Certification by PW4)
These forms are part of the regulatory framework in Malaysia and must be certified by a competent person (PW4 wireman).
- Borang G confirms that the electrical installation has been completed in accordance with applicable standards and requirements.
- Borang H certifies that testing and commissioning have been carried out, and that the system is safe for energisation.
Together, these forms serve as official confirmation that the installation is both properly executed and safe to operate.
3. Electrical Load Declaration
The Electrical Load Declaration outlines the total electrical demand of the installation.
It includes details such as lighting, power sockets, air-conditioning systems, and equipment loads. In some cases, diversity factors are applied to estimate the actual maximum demand.
This information is important for determining whether the existing power supply is sufficient and ensuring that cables and protective devices are correctly sized.
4. Endorsed by Professional Engineer (PE)
These documents are typically reviewed and endorsed by a Professional Engineer (PE) to ensure the design complies with engineering standards and safety requirements.
Proper submission of these documents helps facilitate a smoother approval process for work permits.
Contractors undertaking such works should ensure that all documentation is prepared and endorsed by qualified personnel.
If needed, support can be arranged to assist with the preparation and submission of these requirements.
ONE MACHINE ENGINEERING SDN BHD
NO 28, JALAN TPP 5/10, TAMAN PERINDUSTRIAN PUCHONG, 47100 PUCHONG, SELANGOR DARUL EHSAN.
WHATSAPP: +60169159608