Electrician Candice Hubbard sent me this guest post. It doesn’t really deal with EMFs but I thought it gave some useful insights into how a home electrical system works, so I decided to share it with you. Here’s her article:
A home electrical system includes the electrical service i.e. the electricity supplied to your house, lighting sockets and different hardwired electrical devices. The electrical power should be enough to handle the everyday life of the tenants, and is generally between 100 amps and 200 amps, even if 400 amps for an extremely big house is common. A commercial electrician sets up the service, and will often install cable TV and telephone wires and at times security systems.
The electrical cables run from the road to the meter box (the component where your power is read to establish your electric bill), after that through an external wall and straight into the electricity board, which encompasses switches also known as circuit breakers to manage the electricity in every room. Here, the amps are split up to supply different parts of the house with electricity. For instance, of the 200 amps accessible in a house, the circuit breaker for the sitting room might contain 20 amps; the circuit breaker for the bedroom might have 10 amps, and so forth.
An electrical system should guard you and your family as required by the building code. A few of the safeguards comprise:
- Circuit breakers that avert fires by disconnecting the electricity supply to a particular part if the cables short out.
- Ground fault circuit interrupters (GFCI) in high-humidity areas, for instance, bathrooms, kitchens, pool areas and garages protect dwellers from electric shock through disconnecting power to the circuit breaker.
- Smoke detectors in every bedroom and in common, rooms on every floor, like corridors, are linked to the system and interlinked to one another to notify dwellers of a fire. A good number of them have battery backup also.
Electrical systems as well are controlled by a local and international building code. For instance, electrical codes in several regions necessitate cabling to be in plastic, metal covering as an added fire deterrence measure. An electrical supervisor from static electrics should test the installation while the system is initially being wired and yet again when the house is completed to make sure all codes are adhered to and the power system is secure for you and your children.
If you have particular requirements, like a big visual/audio entertainment complex or a house, office, inquire from your designer whether they provide sophisticated cabling systems, and what they incorporate.
For instance, a builder might offer a sophisticated cabling system that can hold particular electronic functions, for instance, audio and video distribution. An access hub, or central supply panel, serves as the supply point for all inward bound data, telephone, satellite TV and cable lines. Information is passed over high quality, high-speed wiring, and ending in wall plates throughout the house. A sophisticated wiring system might as well incorporate dedicated fax, voice and workstation modem lines to assist you work from home.
Keep in mind; the position of communication wiring, electrical outlets and lighting cannot be altered. As well, identify what options are accessible and which ones work for you.
Not many people take the time to understand how their homes electrical system works, however Candice Hubbard a commercial electrician with static electrics has devoted her time to educate people how electrical systems should work.
Attila Muhi said,
I doubt that you have so many amps. The main fuse for a household connection is rated between 16-25 amps in Europe….
Daniel Bair said,
In the USA, it actually is 100 or 200 amp for residential homes. When I came to Thailand I was surprised to find main disconnects at 16 to 25 amp. But the USA is running on 110 volt and most of the rest of the world is running on 220 volt. It seems to me that 220 volt is almost four times as efficient as 110 volt service.
Attila Muhi said,
Do you have a 3-phase system in the USA ?
Hi. Just a quick question about EMF (Not EMR),
With my computer there are several electric cables; one to the puter, one to the monitor, another to speakers and so on, some of which I have curled up on themselves to keep them neat and out of the way.
It seems to me that I don’t need a cable two metres long when in fact I only need one say 30cm long from the power board to the actual device.
In relation to the strength of an Electro Magnetic Field (not Electro Magnetic Radiation), will a cable of say two metres in length emit a stronger EMF because it is essentially an antenna two metres long, than say a cable that is only 30cm long?
I’m wondering if it would be prudent to use as short a cable as possible (or is as reasonably practical) in order to reduce the relative strength of the EMF as measured in Gauss (think that is right).
My thinking is the shorter the cable then then less of an EMF (Electro Magnetic Field) the cable will emit.
I really want to reduce the EMR and the EMF in my house, and I’ve already removed the rounters Wireless capabilites so only the fixed line LAN is usable.
Next is the EMF that the electric cables in my office may emit. Would shortening the cables achieve a reduction in the level of EMF’s in my office?
McCall Hazelton said,
Home electrical systems are so complicated, and that means they could be dangerous. My husband likes to do a lot of the work around the house, but I wont let him go anywhere near the breakers or anything electrical. I would much rather he be safe, and leave it up to the people who have been trained and do this kind of thing professionally.
Would you or anyone else know about electronic/magnetic water conditioners that break up calcium in hard water to prevent scale buildup? One uses electric frequencies http://www.calmat.net/calmat/en/the-technology.html
And the other one that I’m considering uses magnetic frequencies http://www.scaleblaster.com/scaleblaster.html
We have very hard water which causes scale buildup, and for various reasons, we don’t want a traditional water softener, so we’re considering these other products, but I’m wondering if they would introduce harmful frequencies into the water supply? Thanks.
MARK M said,
The utility’s system itself can have trouble that can affect things in your home. Its built-in safety features can stop power in time, but other connections, broken lines, storms, imperfections, or mistakes can sometimes allow unusual voltages into your system, possibly damaging parts of it. The sensitivity of home electronic equipment to this has made us more aware of this possibility, so that our use of surge protectors has become common. But some surges are difficult to protect against and can be similar to lightning strikes in their effects.
Roy Demauney said,
how many emf’s are there on the opposite side of a concrete residential (CMU) wall if the bed was opposite the meter-can for 200 amps. What if any is the health effect, and how can this be measured?
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