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The main rule is that you can't just lay cable on wooden surfaces or run it under cladding without protection - it's a fire hazard, plain and simple.
Use cables with non-flammable insulation like VVGng or NYM, but even those need to go inside protective channels - metal conduits or plastic boxes. Some people think a good cable is enough, but protection is mainly needed against mechanical damage and contact with wood. Don't skimp on this - fixing it later costs more than doing it right from the start.
The main thing is to use cable with non-flammable insulation (VVGng-LS or NYM), and that's not just a requirement, it's insurance against disaster.
You need to lay it in metal conduits or cable channels, preferably out in the open so you can see the condition of the insulation and ensure proper ventilation.
Avoid hidden wiring in the walls of a wooden house - even if you really want to do it for aesthetics, the risk isn't worth it.
I'm no expert in electricity, but when my husband and I were renovating our house on the edge of Tomsk, we had to figure things out. The main thing is to use metal or plastic protective tubes (cable channels) - definitely don't just run wires along the walls or inside them without protection. Wood burns, that's a fact, so everything needs to be insulated. You can't lay wires between rafters or in gaps in the wood without a covering. It's best to run them on the surface in special channels or in tubes - it doesn't look great aesthetically, but it's safe. If you really want to hide the wires, then only in a metal casing, and even then it's better to consult with an electrician.
Another important thing - before you buy materials, make sure all the wires and cables are rated for the load you need. I made a mistake when I tried to save money on cable cross-section, and then I had to redo everything. Plus, you absolutely need a proper grounding system and circuit breakers. Honestly, in wooden houses it's better not to experiment - call a trusted electrician who'll prepare a project and do everything properly. It costs more, but then you can sleep soundly and not worry about fires.
The main thing is to use only cables with fire-resistant insulation (VVGng or NYM), run them through metal pipes or cable channels so the wood doesn't come into direct contact, and definitely don't hide the wiring under cladding. Best of all is to just call a professional electrician - this isn't one of those situations where you can experiment, especially in a wooden house where the fire risk is higher.
In a wooden house, electrical wiring needs to be laid only in non-flammable cable ducts or special metal pipes, never just directly on the wood - I've done it myself and I see how many people make this mistake.
The cable should have double insulation, and all connections should be placed in distribution boxes that also shouldn't touch the wood directly.
It's best to entrust the wiring to a professional and get an inspection certificate, because you shouldn't mess around with electricity in a wooden house - there's still always a fire risk.
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