KEY POINTS
- Start with the site address and the organisation that bills your supply.
- Confirm any landlord or industrial-estate connection arrangements.
- Obtain a site-specific document checklist and schedule.
Before requesting a new connection or additional capacity, identify who supplies the site and who is authorised to apply. The location is the starting point, but a tenant may also need to coordinate with a landlord or industrial-estate operator.
Which authority covers the location?
MEA, the Metropolitan Electricity Authority, serves Bangkok, Nonthaburi and Samut Prakan. PEA states that its service area covers the other 74 provinces, including Chonburi, Rayong and Chachoengsao. These service areas are useful for initial planning; confirm the actual connection and account arrangements for your premises.
Check an existing electricity bill, the meter/account details and the site address. For a leased factory or unit supplied through a private distribution arrangement, ask the operator where the utility connection ends and your installation begins.
Separate the customer documents from the engineering work
Prepare a responsibility list with three groups:
- Applicant information: the legal applicant, authorised signatory, site-use documents and any consent required from the owner.
- Engineering information: existing and proposed demand, the single-line diagram, equipment specifications and the connection arrangement.
- Site coordination: access, construction work, inspection readiness and the proposed energisation sequence.
Use the checklist for the actual service requested. MEA’s e-Service and PEA’s customer guidance are official starting points. A new small-meter connection and a factory supply upgrade should not be treated as the same application.
Plan around confirmed milestones
Ask the responsible office which information is needed for an initial review and which must be complete before inspection. Track the application reference, outstanding comments and drawing revision used for each submission.
Keep utility review, external supply works, customer equipment procurement, installation and energisation as separate milestones. Their duration depends on the site and scope. Confirm dates before committing to production start-up; an estimated approval period from another project is not a guarantee.
Compare scope and costs clearly
The proposal should identify application support, design, equipment, construction, testing and any utility charges separately enough to understand what is included. Record who pays each charge and who answers technical comments. Check the applicable tariff and billing arrangement against the utility or operator’s current information.
For the initial discussion with ETES, provide your location, current supply details, proposed loads and available drawings. These help define the industrial electrical scope and any work needed inside the facility.
Common questions
Can we choose MEA or PEA based on price?
Service arrangements follow the location and connection agreement. Confirm the relevant provider for the site instead of assuming the utilities are interchangeable.
Does BOI promotion replace the electricity application?
Plan the investment-promotion requirements and supply application as separate workstreams. Ask the responsible offices about the documents required for your project.
What if we rent the premises?
Confirm the applicant, allocated capacity, metering, ownership of equipment and written permissions with the landlord before defining the work.
ETES services for this work
References & further reading
Primary publications used in this guide. Confirm the requirements and editions applicable to your project.
Send ETES your site location, equipment details and planned schedule. Our team can discuss the work required.
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