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.

Finding the right electrician for your Tampa business is about more than just needing to get a single project done. Electrical needs in modern commercial settings are constantly evolving, meaning you need a trustworthy professional at your side and ready to serve when you need them most. Trouble is, there are tons of electrician to choose from! So how do you single out the best electrician for your needs? The team at Hoffman Electrical weighs in with our handy checklist!

When it comes to electrical tasks in yousitur home, it’s never a good idea to turn them into a DIY project. Electricity is a very necessary and useful utility, but can be extremely dangerous too and it’s crucial that you call in a certified, skilled and insured electrician to handle the job for you. Look for a professional and reputed company that provides 24/7 services and keep their number easily accessible at all times; this will ensure you get prompt services exactly when you need them. Here we discuss in which situations you should call in an emergency electrician to tackle the job for you:

This is extremely dangerous and you should immediately turn-off the circuit breaker that you feel is connected to that wire. Do not try to repair this yourself as there could be a chance that the circuit breaker you turned off isn’t connected to that particular room wire at all and this exposes you to the risk of electrocution.

This is a situation you shouldn’t take lightly at all. It’s important that you keep all your family members and pets away from that room and switch off the circuit breaker you think is connected to that wiring line. If you have any water pooling, puddling or accumulated (as in a flood situation), call in a skilled electrician to check all the wiring and address the problem without delay, as this is a major electrocution risk.

It’s not often that a home will lose power completely, while there is no similar problem in the neighbourhood. However, if the power does go out only in your home, quickly check with your neighbours and check whether the street lights have also lost power. If everything seems to be alright there, you may have a major electrical problem on your hands.

In all these situations, do not try to find out what the problem is; call in a regular electrical maintenance done. The company you hire for the job will send out skilled professionals at pre-decided schedules to conduct a thorough check on the wiring. In case any potential problems are noticed, you will be informed about them and they will be addressed without delay. This reduces the chances of major electrical problems surfacing out of the blue.