Automation lies at the core of much of our modern lives. However, it evolves at radical speeds. The simple concept, to build a machine to perform a task without human intervention, was the engine of the industrial revolution. Now that concept is the driving force behind robotics, self-driving vehicles, and a wide range of advanced technologies.

Most automated tasks are part of a closed-loop system. This system is designed so that the outputs are monitored and fed back to the controller. The controller changes its operation as needed. An example of a closed-loop system is a home thermostat, which monitors the air temperature. When the low set-point is reached, a contact closes in the thermostat, beginning a furnace lighting cycle. As the furnace runs, the room air temperature increases until the high set-point is reached. The contact opens and ends the furnace burn cycle. This is automation.

With electrical relays, it is possible to achieve a variety of automatic functions. A motor starter uses a relay to close a contact that sends electrical power to a motor. In addition, it closes a set of auxiliary contacts that keep the main relay closed. A control mechanism, such as a temperature input or a stop button, can be wired in series with the auxiliary contact. This allows for control of the motor. An expansion of relay logic is the programmable logic controller or PLC. Instead of mechanical relays, a PLC uses a set of input and output contacts connected to a computer controller. Software in the controller then dictates how the inputs and outputs interact. They additionally execute specific patterns of operations, based on programmed ladder logic.

A significant number of homes in Baltimore and Bethesda, MD, Alexandria, VA, and Washington, DC built between the mid-1960s and the first half of the 1970s have hazardous aluminum wiring rather than copper. During that time, aluminum wiring was considered safe to use and viewed as a cost-saving measure. The U.S. Consumer Product Safety Commission (CPSC) now believes aluminum wiring poses a safety hazard in homes that still have this type of wiring.

The biggest danger associated with aluminum wiring is that unanticipated fire hazards arise from the oxidation and deterioration caused at the points where aluminum wiring is connected at outlets, light fixtures, and splices. While this can cause overheating and arching that won’t trip a circuit breaker, it can cause a fire. Aluminum wiring was used in an estimated 2 million homes between 1965 and 1973—and many of these homes are located in the MD, VA, and DC area.

If you’re concerned about dangerous aluminum wiring, pay attention to the following warning signs:

All of these signs indicate a potential fire hazard for standard aluminum wiring.

Aluminum wiring should be thoroughly evaluated by a qualified electrician who is experienced in inspecting and correcting wiring problems. The CPSC recommends a few methods for correction. The first is to rewire the home with copper wire, an expensive option that really only makes sense if the homeowner is already in the process of completely remodeling or doing deep renovations. The second option is to use the Copalum crimp method to correct the problem. This involves attaching a piece of copper wire to the existing aluminum wire with a specially designed metal sleeve and powered crimping tool. It is a permanent repair option that will eliminate the dangers posed by aluminum wiring. A third option is to use a UL listed copper to aluminum connector to attach a copper wire to the existing aluminum wire.

Only an experienced electrician can accurately determine the level of danger a home with aluminum wiring faces, and then fix the problem in an efficient, timely manner.

If your home has aluminum wiring, we recommend that you call Kolb Electric or contact us online. We will send one of our expert electricians out to evaluate the aluminum wiring in your home to determine the best option to make your home as safe as possible. We’ve been serving Baltimore and Bethesda, MD as well as Alexandria, VA and Washington, DC since 1925. You can count on our experienced electricians to get the job done right the first time.

Some winters pass quietly, others live in infamy. As one of the latter, this winter many of you may have had to resort to a “by any means necessary” approach to staying warm. Hopefully you had carbon monoxide detectors in your home to help you make it through safely. Manage without them? You might want to seriously consider the addition of these useful appliances.

Who needs a carbon monoxide detector? Anyone using any type of combustion heating such as wood stoves, fireplaces of any kind, gas and oil furnaces, in addition to gas appliances such as water heaters, stoves, and more. The incomplete combustion of fossil fuels such as coal, wood, charcoal, kerosene, propane, and natural gas used to power these items naturally produces CO (carbon monoxide) fumes. If you made it through this winter without a detector – great! But don’t push your luck. CO is the number one cause of poisoning deaths in the U.S. The Consumer Products Safety Commission (CPSC) reports 200 people are killed each year from accidental CO poisoning, with another 5,000 injured. Chimneys get clogged, appliances malfunction or suffer venting issues, and today’s airtight homes increase the chance of CO accumulation. In short, stuff happens – be prepared!

We love carbon monoxide detectors. Why?

How they work Though design varies slightly by model, carbon monoxide detectors use a CO gas sensor to identify and measure the concentration of carbon monoxide in your home in parts per million (ppm). When dangerous levels are detected, an electronic pulse is sent to activate the alarm – the higher the levels, the faster the response.

Are your carbon monoxide detectors safely installed?

Know the signs of CO poisoning so you can react quickly:

Need to add a few carbon monoxide detectors to your home? Contact Mr. Electric® today. Our professionals technicians use the latest in technology to ensure the safety of you and your family.