Most common distribution network and generation is done with 3 phase structures, with special attention paid to the phase balancing and resulting reduction of ground current. It is true for industrial or commercial networks where most power is used in 3 phase machines, but light commercial and residential users do not have real-time phase balancing capabilities. Often this issue leads to unexpected equipment behavior or malfunctions and in extreme cases fires. For example, sensitive professional analogue or digital recording equipment must be connected to well-balanced and grounded power networks. To determine and mitigate the cost of the unbalanced electricity network, electric companies in most cases charge by demand or as a separate category for heavy unbalanced loads. A few simple techniques are available for balancing that require fast computing and real-time modeling.[135]

In Maryland, you have the power to choose your electricity and natural gas suppliers. More than 500,000 Marylanders have already switched energy suppliers. Need a good reason to switch? Some suppliers regularly offer rates and service that are 10% or more cheaper than the utility. Things could get worse - Baltimore Gas and Electric Co. has proposed a rate increase it says would boost the average residential customer's total bill by $5.77 per month. A recent Choose Energy survey found that more than 86 percent say they've never chosen a competitive Maryland electricity plan, meaning they're probably paying more than they have to for energy. Don't pay more. Just enter your ZIP code above to see how you can begin saving with Choose Energy!
Another unwelcome side effect of not knowing your average monthly kWh usage level is that you may end up paying more than you expect. This can occur when a customer inadvertently shops an electric rate based on a higher usage level than they actually use. Electricity suppliers commonly advertise their electric rates associated with the highest (2000 kWh) usage levels since those tend to be the lowest rates.
Since consumer demand directly affects energy rates, it’s important to note seasonal trends of demand throughout the year. Overall, demand tends to be higher during the winter and summer months and lower during the fall and spring months. This pattern isn’t shocking since it’s normal for people to require more energy during extreme heat and extreme cold.

It’s very important to do your own research to understand the business focus of the company you are considering, as well as tax advantages (and possible disadvantages) if the company is a limited partnership. For example, Seadrill Ltd. SDRL, -1.72%  provides offshore-drilling services worldwide. Seadrill Partners LLC SDLP, -3.22%  operates offshore-drilling rigs under specific contracts with several major oil companies, including Exxon Mobil Corp. XOM, +0.17%  and Chevron Corp. CVX, -0.43%  
It’s very important to do your own research to understand the business focus of the company you are considering, as well as tax advantages (and possible disadvantages) if the company is a limited partnership. For example, Seadrill Ltd. SDRL, -1.72%  provides offshore-drilling services worldwide. Seadrill Partners LLC SDLP, -3.22%  operates offshore-drilling rigs under specific contracts with several major oil companies, including Exxon Mobil Corp. XOM, +0.17%  and Chevron Corp. CVX, -0.43%  
Unlike with long-term plans, monthly, variable rate (no-contract) plans have no cancellation fees. You won’t have to pay a penalty if you decide to take your business elsewhere because you found a better deal. Plus, you won’t be left paying more than you should if the market rate for energy trends down. However, if the market prices rise, you’ll have to pay more than those who are in-contract.
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