Building a Factory in Malaysia? How to Plan Your TNB Power Supply Before Purchasing the Land
For manufacturers planning to build a factory from the ground up, electricity supply should be assessed before purchasing the land, not when the factory design is finalised.
This becomes particularly important for power-intensive manufacturing involving CNC machinery, automated production lines, refrigeration, cleanrooms, heat treatment or other specialised equipment.
A factory requiring several thousand amps, for example, may require its own 11kV electrical infrastructure, rather than simply requesting a larger electricity connection from Tenaga Nasional Berhad (TNB).
Here is a simplified three-step process for future factory owners.
Step 1: Establish Your Factory's Actual Power Requirements
The process starts with the factory owner assembling the right professional team.
Typically, this includes:
- Architect / engineering consultant or project manager
- TNB-registered electrical consultant
The electrical consultant needs to understand how the factory will actually operate, rather than receiving only an estimated figure such as "we need 4,000 amps."
The manufacturer should therefore provide:
Factory development information
- Exact development location
- Factory layout and development plans
- Expected construction and operational timeline
Manufacturing information
- Nature of the business
- Manufacturing processes
- Machinery and equipment to be installed
- Production/process flow
- Expected electrical demand
This information allows the consultant to calculate the factory's actual electrical requirements and prepare a detailed proposal for TNB.
Why the location matters
Having sufficient land for a factory does not automatically mean sufficient electricity is available.
The consultant will need to study how electricity can physically reach the proposed factory.
For a large industrial requirement, this could involve:
- A new 11kV SSU (Main Switching Station)
- Connection to the appropriate TNB PMU/substation
- Cable routing from TNB infrastructure to the factory
- Metering location and arrangement
An important point for factory owners: the nearest PMU does not necessarily mean it has sufficient available capacity to supply your factory.
This is why power feasibility should form part of the early development assessment.
Step 2: Consultant Engagement With TNB
Once the preliminary factory design and electrical requirements are established, the registered electrical consultant can formally engage TNB.
A project meeting will typically address:
1. Supply viability
Can TNB provide the required power at this location, and what infrastructure is necessary?
2. Connection solution
TNB and the consultant determine the appropriate supply arrangement, including SSU requirements, connection point, cable routing and metering.
3. Cost
Once the required infrastructure is established, the relevant costs and contributions can be determined.
4. Payment and implementation
Following acceptance and payment, the project can proceed towards implementation.
For manufacturers, this stage provides far greater certainty over whether the proposed site can accommodate the factory's electrical requirements.
Step 3: Construction, Commissioning & Handover
The electrical infrastructure is then constructed together with the overall factory development.
Upon completion, the relevant systems must be inspected, tested and commissioned before electricity supply can be activated.
This process will ultimately coordinate with the factory's completion requirements, including:
Construction → Testing & Commissioning → CCC → Handover / Operation
The objective is straightforward: when the factory is ready for production, its required electrical infrastructure should also be ready.
When Should a Manufacturer Start Talking to TNB?
As early as possible — ideally during factory planning and before committing to the final factory design.
For example, a manufacturer planning to commence operations in two years should not wait until the factory is under construction before determining whether several thousand amps of power can be supplied.
The electrical requirement can influence:
- Factory design
- SSU/substation space
- Site planning
- Cable routing
- Development cost
- Construction timeline
- Ultimately, whether the proposed industrial land is suitable
For power-intensive manufacturers evaluating industrial land, electrical feasibility should therefore be treated as part of site due diligence, alongside zoning, water supply, access, infrastructure and planning requirements.
Key takeaway
Do not start by asking TNB, "Can this land supply 4,000 amps?"
Start by appointing the appropriate consultants, defining the factory's manufacturing processes and machinery, and establishing the actual electrical load.
The registered electrical consultant can then take those requirements to TNB to determine what supply infrastructure is technically viable, what it will cost and whether it can be delivered within the factory's development timeline.
Looking for a factory or industrial land?
Alvin Chin focuses on industrial property across Selangor, Klang Valley and Negeri Sembilan, including factory buildings and industrial land for owner-occupation.
For companies planning a new Malaysian manufacturing facility, enquiries can be based on land requirement, built-up area, industry, power needs and target operational date.
