Jumat, 04 November 2011

Rancho Bernardo Electrician- Time to Upgrade - Old Electrical Service

By Leon Burgett


Many houses built in the last century were built with minimum electricity service. Looking back at the time, there was simply not that many electrical appliances in a home. The air conditioning was not readily available after World War II and in 1955 only 10 percent of U.S. households had electric clothes dryers. Hair dryers, ovens, electric ranges, microwave ovens, electric water heaters and the like have been added over the years, the growing demand for electricity.

Some of the modern amenities, the house could easily get along with only 50-60 amps of electrical service, and still today, this level of service is not a problem, provided that the electronic equipment is minimal. However, when the body thereby increasing the base of start-modern facilities, will soon run out of electricity, which can cause local decreases, circuit breakers or fuses wires overheated and a fire hazard.

Computers are not much, but they do not like brownouts or flickers in power. For any type of computer or the computer is a good idea to use surge protectors and uninterruptible power supply to avoid damage. This includes computerized sewing machines, exercise equipment, televisions, digital video recorders and cable boxes.

Another aspect of the older houses is that many of the wires coming from the Poles in the house, and then down to the meter home, they are 40-50 years of age and are now gone. Often the cable wrapped around the center conductor can now be seen through. Contrary to popular belief, it is not a country, but the current-carrying conductor, often have a substantial bank account. While wrapping the tape is acceptable for some men think that the more electric service entrance frayed (IF) cables must be replaced for safety reasons. At least, that leadership must be changed so that it is safe and is a good opportunity to upgrade the whole service more modern 150-200A service. Most municipalities will not be installed at least 125, 150A, 200A, and most of the time service is the same lowest price, so that the 200A is installed. Townhouses and condominiums are now also 125-150A per unit of service.

Some of the all-electric homes or houses with lots and lots of lines, maybe even need a major service (400A) due to the requirement of not more than 42 circuits per panel, 150-200A per panel . With the new rules, the number of circuits per panel is loose, but several houses with air conditioners, water heaters, kitchens seconds, dryers, hotels and other large users of electricity can still be a need for electricity service more.

How to tell Aperage

Round-Base: 50 to 60 amps

Small square base (side diameter of the meter): 50-60 amps

A large rectangular box (about three times the diameter of one meter): 150-200 amps

Extra-Large Box (height of about six times the diameter of the counter.): 400 amps

Modern life consumes electricity

Here are some typical amperage requirements common household appliances.

Electric Range: 40A

Wall Oven: 40A

Modern Electric Clothes Dyer: 30A (min.)

Air unitless: 25A (min.)

Air-conditioning, the indoor unit: 15A

Microwave: 12A

Toaster: 12A

Bath: 12A

Dishwasher: 15A

To calculate how many Amp device needs, divide by 120 watts (blood collection). For example, the use of a microwave that uses 1800 watts to a 15 amp circuit. (Amps = Watts / Volts)

Safety Note

The service entrance cable must always be protected from the elements, and the possibility of fraying wear o. The solution of soil around the foundation of a house can get the conduit outside the meter box, with potentially disastrous consequences.




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