Today we talk about electrical safety, on how to make the ground connection.The Regulations for Electrical Installation (PUE) of the Bible, for electricians, it is clearly stated that the electrical equipment must be connected to the grounding circuit.This is not a whim but a requirement, following which in many cases to save the life of a person.
Let's look closely at the power cords automatic washing machines or electric water heater.They manufacturers have placed a special tag with a reminder of the fact that these appliances must be connected to the mains grounding.It is unlikely that someone has doubts about the correctness of such a connection.The problem is that in homes and apartments built in Soviet times there is no ground loop.Even if he is, no one bother to supply a third ground wire to the outlets and devices - such was the standard.Accordingly, no one was interested in how to make the ground connection.This is easily explained if we remember the number of electrical appliances in the average home: radio, lamp, iron and TV.Now everything has changed - the instrument has increased, respectively, to increase the potential danger.Not surprisingly, the online forums often asked the question: "How to make a grounded?".Fortunately, this problem is easily solved.
Next we will talk about how to make a grounding in a private home.Of course, you can simply drive to the ground metal pipe and lead to her lead, but the effectiveness of such a decision may be insufficient.Terms device earthing system is clearly regulated, and they indicated loop resistance at 4 ohms.Banal pile tube may not provide the desired value.In this case, as the grounding is?Electrodes should be prepared - it can be metal rods, tubes, angles of at least 2 meters.Although the conductivity of copper is one of the highest, the metal from contact with the air is covered poorly conductive oxide, so using ordinary steel.In addition, it is much cheaper.
If you decide to use the area, the cross-sectional area must be at least 150 mm square.- It is necessary to ensure adequate contact with the soil.If the electrode rods are taken, their diameter shall be not less than 10 mm.For pipes to satisfy more stringent requirements: the wall thickness be 3.5 mm or more at a diameter of 32 mm.In the future the electrodes should not be a paint, varnish, any other insulating layers.
to create a simple system it is necessary to draw on the ground a triangle with sides of length 1.2 m. Next you need to delve into the drawing by half a meter, the electrodes placed in the corners and score them with a sledgehammer.After that, they are connected conductor - metal strip or rod large cross section (at least 50 mm sq.), Connecting the welding system together.This conductor underground leads to the house and the wall brings to the surface.Attached to the wall dowels.In the band (bar) cap welds bolt.It is necessary to draw the line of copper (6 mm sq.) Or aluminum (16 mm sq.) Wire to house-distribution box, and then - the third wire across the wiring.
But grounding is in the apartment, living on the upper floors?The skyscrapers circuit is always, it just is not on the residential areas.We'll have to pull the line to the floor in the stairwell, where the shield with metering devices and machines.That's where you can find the ground bus and connect to it.Next, you need to spend a wire stretched to his apartment and spread over the entire wiring, turning it into a three-wire - grounding.As you can see, with this method do not need to dig, so the work done faster.
