Residential service line
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Are there any residential supply lines designed with three-phase connections these days? Is the approval of the power supply department required? There are more and more rich people these days!
In general, the use of three-phase power is not allowed, as it is more complicated to work with. For single-phase power, household supply lines are usually made up of 3 wires or cables with a cross-sectional area of 10 mm2; in the past, 4 mm2 was sufficient
It can’t be three, right! There are two wires, L and N; rural public power grids use low-voltage overhead lines, so there is no PE wire, and therefore it’s not possible to have three wires.
The electrical load requirements for residences are determined based on the size of the residence; it’s not possible to increase this load just by having more money. Residential design codes require that the incoming wire have a cross-sectional area of at least 10 square millimeters. It is generally a meter with a capacity of 40 (10) A. Generally, power supply companies require three-phase metering for currents greater than 40A; therefore, three-phase power supply is now used for some multi-story residences and villas.
It is not allowed; the power supply department needs to conduct separate inspections and enter into a separate agreement with the user. Generally, in new buildings, the power supply reaches the stairwells as 3-phase 5-wire system. Each floor usually has its own separate phase of power supply, and the wires entering the buildings are typically 10MM–16MM in diameter, with electricity meters rated at 20A.
The electrical design codes for civil buildings require single-phase systems; there is no need for homes owned by wealthy people to consume such large amounts of electricity. Moreover, introducing a three-phase power supply in a home increases the risk of incorrect wiring. In countries like the United States, single-phase power is used in residential buildings, which prevents household appliances from being damaged due to a broken neutral wire.
It seems that aside from villas, there are few places where a three-phase system is used; in rural areas, two wires are still sufficient. . It’s not safe
Does it matter if the residential service line is designed as a three-phase line or not, or whether there are many wealthy people living there?:)
It is generally not allowed, provided that you have a three-phase air conditioner at home and maintain good relations with the power supply authorities; apart from applying for industrial electricity, no other installation is permitted
Using three-phase electricity is quite common in my area; I come from a rural area as well. All that’s needed is approval from the local authorities, as every household in our village raises chickens, and their food consists of a mixture of purchased feed and corn. First, to grind corn into powder, an electric motor is needed, so three-phase electricity is connected.
That would be for industrial use, and approval is required! Money can get things approved!
Don’t all home workshops use three-phase electricity? ! ! ! ! !
It seems that it’s quite easy to get approval in Jiangsu; my father-in-law’s fish pond is powered by three-phase electricity
Sure, it depends on the user’s load requirements. If you want a separate villa, three-phase power supply can be used.