THAILANDSICThailand Standard Industrial Classification

TSIC Activity

43210

Electrical installation

จัดหา ติดตั้ง ดูแลระบบโซลาร์เซล์ ในทุกพื้นที่ และ ซื้อขาย อุปกรณ์ที่เกี่ยวกับโซลาร์เซลล์ ทุกชนิด

What this activity covers

Companies in this sector install electrical systems and related infrastructure for buildings and civil engineering projects.

  • Electrical system installation — Installation of electrical systems in buildings and structures
  • Telecommunications wiring — Wiring for telecommunications and computer networks
  • Lighting systems — Installation of various lighting systems including street and runway lights
  • Fire alarm systems — Installation of fire alarm systems in buildings
  • Security systems — Installation of security systems for buildings and properties
  • Household appliance connections — Connecting household electrical appliances and panels

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

  • Solar energy systems — Design and installation of solar power generation systems
  • Plumbing services — Providing plumbing services alongside electrical installations
  • HVAC consulting — Consulting for heating, ventilation, and air conditioning systems
  • Telecommunications equipment — Installation and maintenance of telecommunications equipment
  • Internet services — Installation of internet and wireless networks

Not included here

  • Installation of communication cables and power transmission, see sub-group 4220
  • Remote and general electronic alarm system control, such as security and fire alarms, including maintenance, see subgroup 8020.

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 43

Construction, except construction of infrastructure providing basic public services in public utilities or transport that requires special apparatus, machinery, technology or expertise, and except other categories prescribed in ministerial regulations

The infrastructure carve-out is subject to a minimum foreign capital requirement, subject to capital thresholds, verify current figures.

FBA B.E. 2542, List 3 (10)Routes: Foreign Business Licence, BOI promotion, US Treaty of Amity

Auto-mapped, verify against the Act. These TSIC mappings are indicative, not legal advice; the schedules of the Foreign Business Act B.E. 2542 are the authority. See the full foreign ownership reference.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

14,049
active companies operate here
฿52.6Bregistered capital, combined
฿176.8B
Sector revenue · 2025
-22% since 2023
฿7.2B
Net profit · 2025
6,413 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
11%of new registered capital is foreign-held
฿109.4M foreign฿930.2M Thai

Foreigners are actively investing in this activity.

New in 2026

740+29.4%

registrations, YTD

Registered capital

฿52.6B+3.7%

since year-end

Largest by registered capital

  1. 1Powerline Engineering Public Company LimitedBangkok฿1.8B
  2. 2Com-Link Co., Ltd.Bangkok฿1.0B
  3. 3Lenzo Phone Card Co., Ltd.Bangkok฿624.2M

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

3,938
Registered
since 2022
3,723
Still active
215
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 1,010 in 20232026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

Emerhub

Restricted activity? There is usually a route.

Emerhub structures foreign-owned companies around FBA restrictions: Foreign Business Licence applications, BOI promotion, and compliant shareholding structures. Talk through your case before you commit to one.

Talk to Emerhub Thailand