How to organize a temporary power supply at a construction site ?

electrical requirements

first provide the requirements for temporary power supply section, which produce the construction work:

1. Reliability .Uninterrupted supply of electricity to the construction period.
2. Quality .The frequency and voltage must ensure that the work of electrical devices.
3. Security .Maximum protection of staff and operators on site.

This requires documented solve organizational issues associated with connecting to the existing mains power sufficient

Arrangements

Depending on the location of the plot on which the construction is carried out fashion choice for the supply of temporary power.The choice of type of cabling affect the following points:

• Distance from facilities and power grids.
• Type of property: house, warehouse or manufacturing facility.
• electrification type: permanent or temporary inclusion of electricity.
• declared power consumption calculation methods for energy consumed.
• reliable and uninterrupted power supply.
• Network selection: single or three phase.
• as a transit pipeline.
• time for which the permit is issued and you are connecting to the network.

the basis of these options is chosen the best way of installation of temporary power supply on site.This may be a supply to existing networks or install a stand-alone generator.When you turn to the network of public facilities, power supply is carried out on a temporary basis or a permanent electricity supply scheme.

Features connection to the existing power grid

first situation, which we consider - the construction is carried out in the vicinity of their own homes.The method of electrification of an already registered entry is considered less expensive and more preferable.At the time of construction works electricity consumption, which is already present in the facility and pay for it happens according to the agreement signed earlier.This option is ideal for temporary power supply of private homes.

After the erection of the new facility and possibly dismantling of old buildings, there is a need of renewal of the contract with the supplying organization.

To do this:

1. The estimated power consumption.
2. The organization receive technical conditions and the connection point for the input.
3. Order project documentation.
4. project align with Gostekhnadzor.
5. Perform electrical work.
6. Call electrical laboratory for the evaluation and preparation of the report tests.
7. signed a contract with Energosbyt, put into operation the object.

All normative documents are provided in the photo:

Please note, in order to make a temporary electrical wiring is also required to issue the documents.

In those cases where the construction site is located away from power lines, require the construction of a new high (or cabling), and all the documents described above for the electrification of the facility.

Entering the facility needs to be done, both for continuous operation.To do this, you need to install the shield outdoor vandal-resistant with IP54 protection class.Box set of dimensions to be able to set the counter and protection devices, sockets and ground tires.You also need to provide a place for backup power.

When building within the non-profit association the cost of services for collective connection is much cheaper dacha, gardening and garage cooperatives.They have a transformer substation, to which it is possible to connect.Many groups already established and formed.Repair and modernization of the equipment was carried out at their expense, the installation of poles, transformers, laying of overhead lines.Reappeared developers can submit compensation from the work already done and to the modernization of the equipment.

Another situation that I would like to see - a temporary power supply of private homes of neighbors.If you are from the independent of the electrification of the reasons being debugged, and time is running out, you should negotiate with the neighbors.If this good man was found, through an additional metering device you are connecting power supply for the period of the repair and construction.To specify in advance the quantity of supplied power (for control of metering devices) and the installation of protective restraining device.In this way, it is easier just to make a temporary posting to the site.

way, little would like to move away from the topic and invite you to familiarize yourself with the temporary power supply means apartment.Find out what you can do if you turned off the light in the apartment for not paying.

Separately need to consider this method of supplying electricity as an electric connection. From a technical point of view, generator sets provide quality electricity.Builders use them on your own and no one is dependent.Disadvantage - the high cost of electricity produced.For this kind of supply is mainly resorted to the beginning of construction, from the time when the supply was a hitch at the stage of registration documents.

Technical measures

After solving all the organizational issues and the timing of power supply circuits at the construction site determine the place to install the panel on an enclosure or support.Also install an additional support in the case of remote areas of power lines for more than 25 meters.Under the rules of entering the shield is installed on the border or the territory of the applicant.From opening the box has made marking of cable lines or power poles to the place of work, power and lighting networks.For optimal power distribution on the construction site power cables supplied to the lifting mechanism to the site of preparation of concrete, wood area, the place works welding works.

At the beginning of the construction of temporary lighting system can consist of several projectors, and is divided into the main and emergency, local or general.To learn more about the types of coverage you can in our separate article.

Consumer Connection Diagrams

During the construction of the building appear cabling route, indicate the type and cable length, load characteristics, creates a scheme of their inclusion.Wiring diagram can be radial, ring, mixed wiring.Radial is powered from a single input from it to the power cables are distributed posts and lighting systems.If the developer has a backup generator, the temporary power supply circuit will be an annular or mixed type.The radial scheme is duplicated wiring diagram of the generator set.This type of supply allows for continued development for possible power failures.

input design

In one of our articles have described the self-assembly of a three-phase shield on the plot.This shield assembly technology differs a little, recall important moments.

metering and protection devices, such as circuit breaker, RCD must be in a sealed box, prevents the ingress of moisture and foreign objects.It is also necessary to organize a grounding device and the grounded shield.Take all safety measures for production work.

Cabling is possible both in the trenches, in places where it will not experience load from passing through it art, and by hanging on the rope at a safe height.Recommended mounting technology to study the rope harness the country.

Safety

Construction - is always movement and moving, resulting in unforeseen risks may arise.Therefore, there are special requirements for temporary power, because there is such a factor, as the adverse effects of the atmosphere on the electrical components and parts.Related working group with low tolerance or without qualification, the presence of flammable and corrosive materials at a construction site, the lack of grounding and potential equalization elements in electrical appliances.

When working in a humid environment should follow the regulations of the SAE 07/01/53, instructing to perform the installation of protection RCD indirect contact in cases where the voltage exceeds 50 V AC and 120 DC.Also, to improve the safety of the personnel working with power tools, you need to use isolating transformers to the equipotential bonding system, which unites all the open housing with a protective connector in the socket.

When illuminated object, choose fixtures with protection class IP54 for outdoor installation.Following our recommendations and the current rules of the SAE you will reduce the risk of injury to a minimum.Take care of yourself.Finally we recommend to view the video, which demonstrates the shield to temporarily supply electricity section:

That's all that I wanted to tell you that is a temporary power supply of construction site and what is required of him.Hopefully, these basics are for you useful and interesting!

It will be interesting to read:

• How to conduct light from the pole to the house
• Wiring in the building with their hands
• How to make estimates for the electrical work