Designing low-current systems: what needs to be considered before installation

Low-current systems combine computer and telephone networks, SCS, Wi-Fi, video surveillance, ACS, security and fire alarm systems. The further operation of the equipment, the possibility of network expansion and the cost of installation depend on how well they are designed.

The design does not begin with the selection of cables or cameras, but with the inspection of the object. The engineer needs to understand the layout of the building, the purpose of the premises, the location of workplaces, server rooms, technical rooms and existing engineering networks. The features of the building, the materials of the walls and floors, the operating conditions and the location of the external lines are also taken into account.

Before starting work, the composition of low-current systems is determined. For an office, it can be a structured cabling system, a local area network, Wi-Fi, IP telephony, video surveillance and access control. The list will be broader at an industrial or commercial facility. Several systems may share a common infrastructure, so they need to be coordinated with each other at the project stage.

Special attention is paid to cable routes. The plan determines in advance where the lines come from and where they go, where sockets, access points, cameras, readers and other equipment are installed. The tracks should be convenient for installation and subsequent maintenance. It is also important to avoid a conflict with the power supply and other utilities.

The amount of equipment is calculated based on the actual load. For example, when designing a local network, you need to determine the number of workstations, network devices, servers, printers, and other connections. For video surveillance, the viewing areas and the number of cameras are calculated. For Wi-Fi, the area of the facility and the number of devices running simultaneously are taken into account.

It is not necessary to design the network exactly for today’s needs. If the company is planning an expansion, additional jobs, or the opening of new premises, this must be planned in advance. Redundant ports, cable lines, and free space in telecommunication cabinets allow the system to be expanded without extensive rework.

The power supply of the equipment is calculated separately. Switches, servers, DVRs, access points, and other devices must receive stable power. Uninterruptible power supplies and other redundancy measures are provided for critical systems.

The result of the design should be clear working documentation: equipment placement plans, cable routing schemes, number and type of equipment, specification of materials and technical solutions for installation. Such a project allows you to determine the scope of work in advance and avoid a situation where installers make technical decisions directly on the site.

A well-prepared project also simplifies further maintenance. Using the diagrams, you can quickly determine the desired line, equipment, or connection location, and when upgrading, you do not have to re-examine the entire facility.

Saving on design is usually more expensive at the installation stage. Errors in the location of routes, insufficient number of ports, incorrectly selected equipment or lack of reserve lead to additional work and expenses.

Therefore, before installation begins, it is necessary to obtain not just a cable laying scheme, but a full-fledged technical solution that takes into account the building’s features, the customer’s tasks, existing engineering systems and the future development of the facility.

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