What to Know About Electrical Wiring in Your Home
Electrical wiring is the system that safely distributes power throughout your home — from the panel to every outlet and switch. This page explains the basics in plain language and honestly shows where what you can do yourself ends, and a licensed electrician's job begins.
How home electrical wiring works — in short
The panel splits the home into circuits
In the panel, each circuit usually has its own breaker and, in most cases, an RCD (residual current device) — this is how power is safely distributed through the whole house, instead of running on one shared line.
Circuits are separated by room or function
Good practice is separate circuits for the kitchen, bathroom, lighting, and high-load equipment like a heat pump or EV charger — that way a fault in one circuit doesn't cut power to the whole house.
Cables run hidden or on the surface
Wiring can be routed hidden inside the wall (chased in and plastered over) or in surface-mounted trunking — the choice depends on the wall material, whether a full renovation is planned, and the look you want.
In new builds and renovations, timing matters
Rough-in with cable routing happens before walls are closed up; devices are connected later, after finishing. If the connection capacity changes, that has to be coordinated with Sadales tīkls as a separate, formal process.
What's worth knowing about your electrical wiring
Breaker + RCD for each circuit
Good practice: each circuit is usually protected on two levels — against overload (breaker) and against current leakage (RCD) per the applicable standard. The specific device types are a separate, more detailed topic.
The panel — your home's control center
The panel holds the breakers and RCD devices that split power into circuits and protect against overload and leakage. The exact number and type of devices is set by the project or quote — not one universal layout.
Cable routing — hidden or visible
Hidden routing (chased into the wall) looks neater, but surface trunking is easier to change later. The choice depends on the wall material and whether a full renovation is planned.
Signs of old or damaged wiring
A breaker that trips often, warm or burnt outlets, visible aluminum wire insulation, lights flickering for no other reason, or a burning smell — these signs mean it's time to call an electrician, not diagnose it yourself.
What's DIY-safe and what isn't
A visual check — is an outlet burnt, does the breaker trip for no obvious reason — is safe to do yourself. Any work on live conductors, opening the panel, or adding a new circuit is not a DIY task.
Provisioning for a smart home during construction
If you're planning KNX, DALI, or another control system down the line, it's cheaper to pull a spare conduit or cable during the rough-in stage than to chase a finished wall later.
How we can help
If you want to understand your home's electrical wiring, or you're not sure whether to call an electrician or handle something yourself, book a consultation.
- A plain-language explanation of your home's wiring
- Help recognizing when it's time to call an electrician
- An honest opinion on the DIY vs. professional boundary
- Advice on timing with your builder for a new build or renovation
- No sales pressure — a consultation, not a mandatory order
Frequently asked questions
What signs suggest a home's wiring might be old or damaged?
A breaker that trips often with no clear cause, warm or burnt outlets and contacts, visible aluminum wire insulation, flickering lights, or a burning smell — any of these signs is worth a professional inspection.
Can I open the panel or add a new circuit myself?
No — any work on live conductors, opening the panel, and adding new circuits isn't a DIY task. What's safe yourself is a visual check, such as looking for a burnt outlet.
What should I know if I'm building a new home or planning a major renovation?
Timing matters — rough-in with cable routing happens before walls are closed up, and devices are connected later after finishing. If the connection capacity changes, that's coordinated with Sadales tīkls as a separate process — this page doesn't repeat that in detail.
Should I plan for anything now if I want a smart home with KNX or DALI later?
Yes, if it's feasible — it's cheaper to pull a spare conduit or extra cable during the rough-in stage than to chase into a finished, decorated wall later.
How many circuits or what cable do I need for my house?
That always depends on the specific site — room count, equipment load, and layout. The exact answer comes from a project or quote, not a general number online.
Still unsure what's an electrician's job and what you can do yourself?
Book a consultation — we'll help you understand your home's electrical wiring, no sales pressure.