High temperatures cause conductors to expand and hence increase in length. The converse is true for low temperature conditions. The change in length varies from one conductor to another depending on its thermal expansivity. The length of copper conductors, for instance, changes by 5 feet per 1000 feet of length when the conductor temperature changes from 100 – 0°, while aluminum changes by about 7 feet. The length increases with increase in temperature and reduces with reduction in temperature.

This increase or decrease in length is of great concern when installing power transmission lines between poles and towers, or when installing other power connectors. There must be an allowance for this change in length since it can cause catastrophes if it’s not there.

Weather changes are associated with increase and decrease in temperature and thus affect power transmission lines and other conductors. However, change in temperature is only one factor that affects power lines. Below are the changes that occur to power lines and other conductors as a result of weather changes:

The amount of heat dissipated from power conductors is reduced during hot and calm weather conditions. Basically, if the temperature of air around the cable is low, more heat is lost from the cable to the air. If the air is already hot, the exchange of heat is lesser. This low heat dissipation causes the lines to overheat. However, the rise in conductor temperature (overheating) worsens when cables are transmitting too much power than required. The first effect of this increased conductor temperature is snagging, which is the downward bulging of the cable between two poles, caused by the increase in the length of cables.

Snagging is largest during extreme hot weather (largest increase in temperature) conditions experienced in summer. The increase in length results to downward bulging of the cable due to the effect of gravity. Excessive sagging is dangerous if it goes below the accepted height clearance – cables could come into contact with trees, buildings and other structures underneath, causing electrocution and fires.

Excessive sagging represent an added weight on the power line and this increase may cause the line to fail or to pull down weak poles and towers. The effects can be small but gradual and so the poles and towers will finally come down or require some adjustment/replacement after some time, which is costly. This sagging can also cause the lines to short out. Excessive sagging is also costly since it leads to increased electrical resistance. This means that a sagged power line transmits lesser current than it normally does, thus causing under-feeding of electrical equipment and industries. It is also costly and time consuming to rectify a sag.

Twice a year (Spring and Fall), the High Point Market promises an array of new home furnishings, wall decor, lamps and lighting that define future trends and excite the imagination.  This year’s fall showing (October 18-23) did not disappoint!  Take a look at bright new styles, just in time for the holiday season.

More than 200 showrooms, filled with outstanding decor and illumination, offered a truly spectacular preview into the latest trends for the upcoming season.  Must-see items include modern table lamps from Van Teal, designer chandeliers from Crystorama and exclusive ceiling fixtures and outdoor lanterns “Made-in-America” from Framburg Lighting.

Van Teal’s “Burst” Collection

The “Burst” Collection from Van Teal features a must-see Gold Leaf and Artisteel finish.  See the entire collection from table lamps to island lights at 1800lighting.com.

Framburg Lighting’s “Brocatto” Collection

“Brocatto” from Framburg features lace and Italian glass for an exquisite presentation and dazzling illuminating effects.

Dynamic Collections from Libby Langdon Lighting for Crystorama

• The “Jennings” Collection

The “Jennings” collection features an artistic geometric in a Polished Nickel finish over White linen shades.

• The “Sylvan” Collection

The “Sylvan” collection features elegant chandeliers with a free-flowing design in Polished Nickel with linen shades.

Coming soon to 1800lighting.com…

“Timeless” table lamp from Currey and Company

Stay-tuned for more highlights from High Point coming soon to 1800lighting.com. Classic and modern table lamps, designer chandeliers and lighting fixtures made exclusively in America are this year’s big winners!

The lives of 21st Century Americans are filled with endless electronic gadgets and appliances. A modern home filled with computers, entertainment systems and portable devices can quickly run short of convenient electric outlets to provide power to the media extravaganza. That makes power strips a must. In addition to providing ample plug space, power strips can also protect your devices, help keep them organized, give a boost to your energy efficiency and provide a flash of style while they're at it. Check out a sampling of models that show off some of the best that power strips have to offer:

If you need advice on powering and protecting your devices, or have any other electrical work that needs to be addressed, contact a qualified electrician without delay.

As we venture further into the era of climate change, humans are constantly searching for ways to decrease energy consumption and increase efficiency. Unfortunately, there's no silver bullet. Truly reducing our impact on the global climate requires a combination of an increase in renewable power generation, behavioral changes to decrease consumption and increasing the efficiency of our homes and appliances. Even as we strive for improvement, sometimes we fall short. According to a new study from the University of California, Berkeley, for example, a federal Weatherization Assistance Program is not bringing in the expected efficiency benefits.

Looking for the Win-Win

Investments in home efficiency are usually considered win-win scenarios. Reductions in energy consumption lessen the impact on the environment and reduce energy bills at the same time. Many upgrades, like replacing an outdated refrigerator with a new Energy Star-certified model, will eventually pay for themselves in energy savings.

However, not every savings promise comes through. The Berkeley study looked at 30,000 households in Michigan that upgraded their home systems with new insulation, weather stripping, HVAC equipment and more. The federal government paid up to $5,000 per house for the improvements, but the average household only realized $2,400 in savings during the lifespan of their new efficiency features. That's not a great return on investment.

Ancillary Benefits

The households saved 10 to 20 percent on their energy costs, on average, which is only about 40 percent of what they were projected to save. The results are discouraging for consumers who are striving to implement any cost-saving measures they can find. Electricians and home service technicians can help you upgrade your home systems, but the changes will only go so far.

There were other benefits to the weatherization program outside the raw financial data, of course. The investments were aimed at low income households, so the money saved helped reduce poverty in the area. Plus, the reduction of carbon in the atmosphere from the program has additional economic benefits. Nevertheless, the disappointing result could be a blow to the willingness of the government to make similar investments in the future.

Let the Buyer Beware

The big lesson for the consumer? Don't believe just any claim about energy efficiency, and do your due diligence before investing in a big-ticket upgrade. You can and should make efforts to reduce your energy consumption, but be careful not to blow your investment dollars on items that don't give you a good return.

"This underscores the value of field-testing," paper author Michael Greenstone said to Vox. "Particularly in a world where economy-wide carbon pricing does not look feasible, we should be redoubling our efforts to find those CO2 reduction measures that have the biggest bang for the buck."

If you need advice on how to get the best return when it comes to energy efficiency, find an experienced electrician who can help you invest your dollars wisely and steer you away from less effective purchases.