Luco Group guides

Electrical Guides for Malaysian Homes & Businesses

Clear answers on wiring costs, tripping breakers, TNB supply, EV chargers and safety, written by an ST-registered electrical contractor and backed by Suruhanjaya Tenaga, TNB and Bomba sources.

Residential · CostsHouse Wiring Cost in Malaysia: Price Per Point, Packages and What's IncludedReal all-in prices for light, fan, socket, aircond and water heater points in Malaysia, the ST cable-size rules behind them, and how to estimate your own wiring job.Read guide → Residential · TroubleshootingWhy Your DB, RCCB or ELCB Keeps Tripping (and How to Find the Faulty Circuit)Find out why the breaker or RCCB in your DB keeps tripping, how to safely trace the faulty circuit in 5 minutes, what Malaysian law requires, and when to call a registered electrician.Read guide → Residential · TNB supplyUpgrading from Single-Phase to Three-Phase TNB Supply: When You Need It, Costs and StepsWhen a Malaysian home needs three-phase supply, the TNB connection charges, the step-by-step application through a registered contractor, and what the electrical work costs.Read guide → Residential · EV chargingHome EV Charger Installation in Malaysia: Landed Homes, Condos, Costs and Tax ReliefHow to install a home EV charger in Malaysia: 7.4 kW vs 11 kW vs 22 kW, whether you need TNB approval, condo JMB consent, wiring requirements, costs and the RM2,500 income tax relief.Read guide → Residential · Electricity billsHow Your TNB Electricity Bill Is Calculated (and Why It Went Up)A plain-English breakdown of the TNB domestic tariff in force since July 2025: energy, capacity and network charges, the AFA surcharge, SST, and the electrical faults that quietly push your bill up.Read guide → Trust · RegulationsHow to Check if an Electrical Contractor Is Registered with Suruhanjaya TenagaWhy Malaysian wiring must be done by an ST-registered electrical contractor, what Class A to D and PW2 or PW4 mean, how to verify a contractor in ECOS, and the red flags to avoid.Read guide → Residential · Distribution boardsDB Box Replacement in Malaysia: When to Change It, What Goes Inside and How Much It CostsWhen your distribution board needs replacing, what a compliant modern DB contains under ST rules, how many ways you need, and what a single-phase or three-phase DB change costs in Kuala Lumpur and Selangor.Read guide → Residential · SafetyRewiring an Old House in Malaysia: Warning Signs, Cost and What the Job InvolvesHow to tell if your house needs rewiring, what full and partial rewiring cost for terraces and condos in Malaysia, the tests an ST-registered contractor must carry out, and how to plan it with a renovation.Read guide →