Question for electricians

How are you, Alexandr? My onboard systems indicated that at 07 Jan 01 23:33, Alexandr Kushnikov Arkadiy Panchenko wrote: AK>>> household appliances, such as a microwave oven, computer. Ground AK>>> on the trough AK>>> baths or radiators are strongly not recommended. I am so AK>>> I suspect that AK>>> it is located where the counters are. If this is so, then AK>>> which AK>>> landmarks to find it? AK> AP>> In new houses, grounding is a relative thing: there AK> AK> There it is provided for by definition. A definition is a theory. And the conversation is about practice. And based on this, first decide: WHAT DO YOU WANT TO PROTECT? If the computer needs work (this is done with the third wire from the shield to housing or metal parts of the device/machine/engine. If you, your dear one, then grounding must be done. So they combine business with pleasure useful - they send earth along the working ground (from the main switchboard to the shields) How do you do this? If you consider it to be grounding or grounding, those are your problems.... AP>> so-called solidly grounded neutral. That is AP>> grounding, in theory, is the power zero passing between AP>> shields on the floors and exiting from the main switchboard of the house. There he is AP>> (again according to the rules) must be grounded (secondary AP>> grounding), and the primary is located at the substation (TP AP>> feeding your group of connections). AK> AK> Based on numerous messages, I concluded that it’s on the dashboard. In general, yes. AP>> Microwave yes at decent AP>> power is caused by a drop in the wires and interference. How to AP>> the computer will react, that’s another question. AK> This is provided for by the design - so everything should be ok. Naive young man... The cable cross-section is calculated not from the _maximum_ but from average permissible load on the wires. Voltage drop on the zero bus there is also. And if you freeze in the evening, when the whole company heaters/stoves/washers will turn on, the difference between the zero bus and the real one grounding... You may be unpleasantly surprised. On the other hand..- it’s important for you _not to experience the potential difference_ between the power of the computer/equipment and other “source of the earth”. That is, if you fill up case, then on it, with the total load at zero, a certain potential is formed, andit will definitely not be on the building structures - so we get that if you you're sitting on the heating radiator and grab the computer - pull, it doesn't really pull, but the volts 10-20 will be on you (through you :) This is not scary IMHO. HO! neutral wires have the property of _burning_ off the busbar in the main switchboard, and if the local electrician instead of the T.O. spent time with the bottle, this wire will burn off completely, you are _zanylennom_ In the building you will receive 220 with the total extinguishing of lighting in the apartment. If you _ground_ the case to the battery, then you get additional potential computer case relative to the phase wire (220/250pk + ~10-20) - worst option of adding voltages with proper wiring and guaranteed absence potential of the case-battery in the event of a zero break. HO! if not only you are so smart, but also a neighbor on the floor above (sitting, of course, on a different phase) who “grounded” the washer/stove is on the same battery and it has a leak to the unit body, then this is until the neighbor downstairs gets around to changing the heating to plastic pipes. In this case, there is a real chance to get 220/250 for body relative to the neutral wire and 380 relative to the phase wire... One in a word - you test the insulation of the computer case and parts to the point of breakdown. So I chose the lesser of two evils and at the same time made sure that next to the computer there was no building fittings or heating. AK> By the way, the microwave does not give any interference, electrical appliances do cause interference AK> with an active motor such as a meat grinder and a mixer. When you turn on the microwave, the voltage drop is quite noticeable. (refrigerator too brings a lot of joy) And if we’re talking about constant interference, then the coolest thing is thyristor regulators. High-frequency interference/sag on _each_ half of the sinusoid networks (100Hz) I apologize for being flamed, maybe this reasoning will help someone else. Sincerely, Arkadiy Panchenko.