Well, OK, so the visual doesn’t work on yanking all the wiring out of your home and taking it into the shop for an annual physical. The real point of this blog, though, is that the wiring in your home, including the wiring connections, outlets, switches, and panel box really does need to be inspected and maintained. Over time, just like our bodies, switches, outlets, and connections do wear out and need to be repaired or replaced.
It would be nice if your wiring system was one solid wire from the panel box to the last plug in the house. The probability of something going wrong or wearing out in that scenario is next to zero. But home wiring systems just aren’t like that. Right from the inside of the junction box and onward, your home wiring system is a series of lengths of wire joined together (connections) according to a code and design that allows the electricity to flow uninterrupted to each and every electrical appliance you have in your house – from light bulbs to stoves, from on/off switches to your furnace. Where these wires are joined together is where there is a potential for problems to occur over time.
We’re going to try not to get too technical here, but the bottom line is that when electrical current flows through wire, there is some resistance encountered within the wire. That’s normal. The combination of electric flow and resistance creates some heat. That, too, is normal. When a connection – think of it as a splice between two wires that hold them together – is met by the electric current, if everything is tight and the splice is good, the current flows seamlessly from one wire to another without generating any extra heat. With us so far?
Heat causes expansion in metal. When current flows, there’s heat generated and the wires expand slightly. When current stops flowing, there’s no heat generated and the wires cool down and contract. Over time, with expansion and contraction, these wire splices can loosen up.
When a wire splice loosens up, current has to work harder to get from one wire to the other. More heat is generated. If the splice is really loose, current has to jump from one wire to another. A massive amount of heat, called an electrical arc, is generated. And, bingo, you have an immediate fire and shock hazard.
Next week, we’re going to take this topic further, but, in the meantime, do give some thought to the importance of having the wiring in your home checked. It is a matter of the lives and safety of your family.






