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In townhouse construction, the task of pulling wires and running conduits is a seemingly simple task, but it carries extremely high risks if done carelessly. Just choosing the wrong wire cross-section, running too many wires in one conduit, failing to mark exposed wires, splicing wires inside the conduit, or lacking grounding, can lead to overheating, short circuits, frequent equipment malfunctions, electrical leaks and shocks, and costly repairs requiring demolition and excavation. In this video, GreenHN engineers directly inspect and share the process of installing concealed wiring in ceilings/walls at Mr. Thai's house in Nguyen Khang, helping to: Optimize electrical safety: reduce the risk of overload, overheating, and short circuits Ensure clear and easy maintenance: wires can be re-installed without fumbling around Protect equipment for the long term: minimize recurring failures due to insufficient wiring or lack of grounding 🔍 Main content of the video Why you shouldn't run too many wires in one conduit (difficult to re-install wires + increased heat buildup) The principle of "beautiful - easy to repair - durable": excess conduit, neat wiring, no crammed wires How to choose common wire cross-sections for each circuit: Lighting: commonly 1.5mm² (downlight connections may use 1.0mm² depending on wattage) Sockets: commonly 2.5mm² 9,000 BTU air conditioner: commonly 2.5mm², 4mm² recommended for excess load – wire cooling Stoves (induction cooktops, ovens, fryers, etc.): 4–6mm² recommended Main wiring for each floor: refer to 6–10mm² according to actual load Green and yellow grounding wires: role in preventing electric shock, limiting risks from electrical leakage/lightning surges, and the principle of choosing cross-sectional area (equal to or one level lower than the main wire; ideally, the same level) Why absolutely avoid splicing wires inside conduits (connection points increase resistance → generate heat → risk of short circuits) Proper wire marking procedures so that the equipment installation team doesn't have to "re-trace" later Introduction to conduit systems + junction boxes: durable for concealed wiring – easy to replace wires, unlike flexible conduit (only recommended for surface/flexible sections) 💚 Electrical systems in townhouses are not just about "getting the job done," but about safety and stable operation – Easy to maintain for the next 10-20 years. 👉 A standard electrical system from the start will help you avoid minor malfunctions, save on electricity bills, and minimize drilling and repairs. 💬 If you are preparing to build or renovate a house and want to properly control the electrical wiring in walls and ceilings, please leave a comment or subscribe to the GreenHN channel. We will continue to share videos on electrical and plumbing techniques for townhouses, based on real-world construction projects – accurate, easy to understand, and suitable for both homeowners and contractors. 🔗 See also: 5 common electrical and plumbing mistakes that can easily cause fire and explosion disasters if not noticed: https://greenhn.vn/5-loi-dien-nuoc-am... How to Arrange Electrical Systems for Townhouses to Meet the Standard Down to the Centimeter: https://greenhn.vn/cach-bo-tri-dien-c... Should you use concealed electrical wiring? Notes on installing concealed electrical wiring: https://greenhn.vn/co-nen-di-duong-di... 👉 Subscribe to the GreenHN channel to watch more videos on construction techniques according to ISO 9001:2015 standards: https://bit.ly/dang-ky-youtube-greenhn Website: https://greenhn.vn Facebook:   / greenhn.vn   TikTok:   / xaynhatrongoigreenhn   _______________ 🏢 GREENHN CONSULTING DESIGN & CONSTRUCTION JOINT STOCK COMPANY 🏠 Hanoi: BT1-16, Housing Area for Officers and Soldiers of Department B42-B57, Ministry of Public Security, Thanh Liet, Hanoi 🏠 Ho Chi Minh City: 65 Nguyen Hau, Tan Thanh Ward, Tan Phu District, Ho Chi Minh City 🏠 Da Nang: 463 29/3 Street, Hoa Xuan Ward, Da Nang City ☎️ Hotline: 0967.212.388 – 024.667.12388 – 0922.99.11.33 – 0922.77.11.33 #electricalcables #houseelectricity #electricalcablecontainers #grounding #electricalconduit #fireprevention #ConstructionEngineering #ConstructionSupervision #GreenHN #GreenHNEngineers