The need to distinguish between the phase wire from a zero bus arises in situations where work carried out by replacing the switches or installation socket, for example. The correctness of the determination of the desired conductor depends primarily on user safety, because any error in this case could lead to irreparable consequences.
This may not be only the failure of the connected device, but also an electric shock or fire due to a short circuit in the chain. In a situation when the hand was not the right tool - the user can use the time-tested methods of determining phase without instruments.
1. Determination of labeling
According to current standards SAE each wire in the cable must have modern insulation coating respective colors, namely:
- Phase conductor is placed in the isolation of a red or brown color.
- Lived in the protective coating of blue - is the neutral wire.
- Finally, the tire having insulation yellow-green coloring - a grounding conductor.
Important! Some manufacturers do not adhere to the specified order of wire marking, forcing users to resort to other methods of identification.
In addition, experts advise not to rely on the results of visual inspection lived home wiring, as inexperienced scattered or electrician can connect them without complying rules.
2. The control lamp
There is another way to solve the problem with electric wiring a supply voltage associated with the use of a control bulb 220 Volts. To identify the correct wires taken incandescent lamp with two soldered to its socket and contact Piglet conductors (photo below).
In response ends of auxiliary conductors is desirable to fix the connectors such as "crocodile", by which it is convenient to equip any compound. One of them clings to the well tinned heating tube holder and the second search phase is performed. If the addition of a second "crocodile", placed in isolation, lamp lights - so the wire will slip ring.
Note: Before connecting conductors voltage apartments completely removed.
It can only be connected after the set reliable contact between the connected elements. Although this method is also quite simple, but its use is not always safe, especially - in apartments, where the phase can accidentally get on the general entrance to the riser. can operate in private homes safely as zero as in this case the tires can be used tap from the grounding circuit.
3. indicator screwdriver
The farm owner hoarders any indicator should be a screwdriver, using which it is possible to easily detect the phase wire.
When dealing with this tool must follow these simple rules:
- It is very important that the screwdriver was OK, that is, really showed the presence of phase.
- For this purpose it should be pre-check on the load, the ON state which differs visually (on a desk lamp, for example).
- When you touch the phase contacts built into it a neon glow lamp starts poorly (photo below).
- With the introduction of the tip into the "earth" terminal of the indicator will not light.
Note: The glow will only appear if the reviewer will make a special thumb pad metal.
It is also important to note that it is not recommended to carry out checks in bright sunlight, do not allow to distinguish the faint glow neonki.