Since electrical work isn’t for amateurs, many homeowners don’t know much about the electrical systems in their homes. With all the wiring hidden behind the walls, it may be that all you know is what you learned in your pre-sale inspection -- if you remember, that is.

When it comes to electrical infrastructure, one attribute that sets homes apart is the type of wiring in the walls. And for several decades’ worth of older homes, that type is old-fashioned knob and tube wiring.

What Is Knob and Tube?

Knob and tube wiring dates all the way back to the 1880s, but it was still in widespread use as recently as the 1950s. For most of its heyday, it was the most economical choice for wiring a new home, both in terms of installation and cost of materials. But by the 50s, mass production of modern electrical cables offered a cheaper, safer alternative.

This type of wiring consists of two wires -- a hot wire and a neutral wire -- strung within walls and above ceilings using porcelain knobs and tubes. The tubes provided a safe place to run wires through studs and joists, and the knobs supported the wires and made it easy to wrap them around corners.

The wires are protected with sheaths. In the early days, these were made of treated cloth, but electricians eventually switched to rubber. Neither material was designed to last forever.

Is it Safe?

Electrical code prohibits the use of knob and tube wiring in most new construction, and homeowners insurance companies often won’t insure homes until they’ve replaced these systems. While it’s true that it’s not the safest choice, knob and tube wiring can still be used safely, but with limitations and special precautions.

One thing knob and tube wiring still does well is release heat. Because the wires are spread out and suspended in air, there’s lots of room for electrical heat to dissipate, which is good for energy efficiency and the wiring itself. But that also means knob and tube wiring can endanger flammable materials like insulation.

To safely use this wiring in any structure, you must be certain that all wiring is clear of flammable materials and that the system is well maintained.

What About Limitations?

Another risk with knob and tube wiring is that there’s no ground wire, which increases the possibility of electrical shock. It also means you can’t use any electronics or appliances with a three-prong plug, as the third prong connects to the ground wire. This inconvenience is often what motivates homeowners to upgrade.

But even where knob and tube can be made to work, homeowners may want to expand that system to other areas of the home. This often means splicing new wiring and fixtures into the existing system, which can lead to overloaded fuses.

A dangerous mistake is to simply upgrade the fuses when this happens. This will get the juice flowing again, but the wiring can get dangerously hot, and the protective sheaths may have deteriorated over their decades of service. It’s a fire waiting to ignite.

Stay Safe

If your home still has knob and tube, it’s important to have it periodically inspected. Even if it’s deemed safe, there’s no substitute for the safety and convenience of modern wiring. And if you’re not sure what kind of wiring you have, just reach out to your local, licensed electricians for a quick inspection!

If you have ever owned a property with florescent lighting, no doubt you have in some way dealt with a ballast. Fluorescent lights are incredibly common, especially in homes and business buildings. A ballast is a tool that regulates the current in a circuit. For fluorescent lights, it regulates and limits the current running through the tube. Without a ballast, your florescent lighting would not be able to handle being connected to high voltage power. Your lamp would overheat and burn out in a second since the current would increase too quickly.

Commercial lighting is typically more intense than residential lighting. Because of the intensity needed to light up large factories and warehouses, commercial lighting produces a stronger magnetic influence and more heat than the lamps you use at home. If you own a business and have florescent lights installed, it is essential to call a professional Atlanta electrician to handle it. Without the proper light ballast or installation procedure, you could have a fire hazard on your hands.

If you are experiencing flickering or humming coming from your fluorescent light, it could be a warning sign of an old ballast. The typical lifespan of a light ballast is 20 years, but poor light bulbs or cold air can cause the lifespan to reduce greatly.

When a ballast needs to be replaced, and you don’t know what you are doing, it is in your best interest to always call a professional. Electrical work can be incredibly hazardous and if you do not possess the proper training you could severely injure yourself.

Want to improve your yard? One of the easiest ways to make it more beautiful is to add outdoor lighting. These multi-functional decorations can both help brighten your property and let you use it round-the-clock and make it even more beautiful by adding some soft, highlighting illumination. While outdoor lighting used to involve substantial work, including running bulky and often-ugly electrical runs, today’s homeowners have a number of new technologies that can safely and permanently run electricity without breaking their bank or compromising on beauty. Here are a few of the great options available to homeowners today.

LED lights are more affordable than ever before, and come in a massive range of styles, colors, and can be utilized for nearly any purposes. Perhaps the best part about them is that they are so small that they use very little electricity, while still offering a considerable amount of light.

LED lights come in many different forms, including spotlights, rope lights, or individual bulbs, meaning you can apply them almost anywhere. Looking to illuminate your deck? Run a few strands of LED bulbs across the top for a mood-setting glow. Want to highlight the beauty of your garden? Install a few lights around your prized plants. The possibilities for installing LED lights are endless.

Pools have had lights for many years, but a modern pool light offers extra options that were never available before. Turn the water in your pool or hot tub a fun color, or cycle through different colors quickly with color-changing bulbs. Additionally, modern pool lights need far less electricity to run and can offer even brighter solutions than ever before. Plus, a pool light can help you stay safe at night by making sure you see the water at all times.

Pathway lights can offer a lovely dressing for your existing paths as well as help you avoid any potential trip hazards. If kids leave toys out on the path, you can avoid these obstacles with a few simple pathway lights. Some models of pathway lights are even solar powered, gathering sunlight during the day to power themselves and then turning on at night with a subtle glow.

Security lights can help shine light in pivotal spots of your home during darkness hours, such as near front-facing windows or your front door. Many of these lights are motion-activated and require very little work to install, but can flood an area with bright light to help you spot and keep away potential intruders. Other types of security lights stay on all night long and offer you the peace of mind of knowing your home is not shrouded in darkness that encourages illegal activity.