Complete Replacement of Aluminum Electrical Wiring in Apartments.
In 90% of condominiums and apartments in Phuket built before 2010, outdated aluminum wiring (Thai Wiring Standard TWS) is used, which is not designed for modern loads. According to the updated Thai Electrical Code 2026 standards, this is a direct violation. Aluminum, under tropical humidity conditions, oxidizes, loses conductivity, overheats, and creates risks of short circuits and fire.
Project Audit and Mandatory Replacements According to TEC 2026 in Phuket:
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Cable: Replacement of aluminum cable TW/THW with copper VAF, THW, NYY with a minimum cross-section of 2.5 mm² for socket circuits and 4 mm² for power lines (air conditioners, water heaters).
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Protection: Installation of a dual protection system in the apartment distribution board: RCBO (RCCB + MCB) on each circuit for disconnection in case of leakage current and SPD (Surge Protection Device) for protection against lightning surges.
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Grounding: Organization of an independent grounding loop (TT system) with a resistance of no more than 5 ohms, if the building lacks one.
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Circuit Distribution: Separation of circuits into a minimum of 8-10 groups: lighting, general sockets, kitchen sockets, air conditioners, water heater, oven, washing machine, ventilation system.
Wiring Replacement Technology for Different Housing Types in Phuket:
Condominiums in Patong, Kata, Karon (High-Rise Buildings):
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Specifics: Limited access to common risers, prohibition on damaging load-bearing structures, need for coordination with the Juristic Person Office.
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Solution: Running new wiring in existing technical ducts and skirting with cable trunking. Installation of an apartment distribution board near the floor panel. Minimal wall chasing only for back boxes.
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Standard: Mandatory use of flame-retardant cable FR (Flame Retardant) in conduit.
Apartments in Low-Rise Complexes (Chalong, Rawai, Panwa):
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Specifics: Possibility of more flexible replanning, often lack of centralized grounding.
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Solution: Complete wiring replacement with wall chasing. Installation of a dedicated grounding loop via a grounding electrode. Organization of a main panel with a voltage monitoring relay.
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Standard: Cable with enhanced moisture protection NYY or VAF-G.
Villas and Townhouses for Rent (Surin, Bang Tao, Kamala):
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Specifics: High requirements for safety and uninterrupted operation for guests, need for system integration (smart home, video surveillance).
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Solution: Design of a three-phase supply (where possible). Creation of backup lines for critical consumers. Laying a separate low-voltage pathway for internet, television, and automation systems.
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Standard: Use of NYM cables and WAGO terminal connections.
Work Process:
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Energy Audit: Creating a single-line diagram of the existing network, measuring loads, identifying weak points.
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Design: Development of a new wiring layout plan, coordination with the owner and management company.
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Demolition: Careful removal of old cables, sockets, switches, and junction boxes.
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Preparation: Chasing walls for the new route (where permissible), installation of back boxes and mounting boxes.
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Installation: Running cables, assembling the distribution board, installing and connecting all fittings.
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Commissioning and Certification:
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Insulation check with a megohmmeter.
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Verification of RCCB tripping.
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Measurement of grounding resistance.
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Preparation of an as-built diagram and issuance of an Electrical Safety Certificate.
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Ignoring the Replacement Leads to:
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Financial Losses: Up to 40% overpayment for electricity due to poor contacts and wire heating.
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Life Risk: Probability of electric shock in damp rooms (bathroom, kitchen) due to lack of proper grounding.
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Insurance Denial: In case of a fire caused by electrical wiring, the insurance company will refuse payment.
Our engineers hold PEA licenses and TISI certificates. We work with materials: Bangkok Cable, Nexans cables, Legrand, Schneider Electric, ABB electrical installation products.
We perform work throughout Phuket with a warranty on materials and installation. Primary diagnostics and quotation — free of charge.