What precautions should be taken during the installation of data center distribution cabinets?

Release Date:

2024-04-16

　　Data center distribution cabinets frequently encounter various issues, most of which stem from improper installation practices. Such mistakes can lead to recurring problems and even serious consequences. In fact, there are several “taboos” and critical areas that must be carefully addressed during the installation of distribution cabinets.

　　When installing a distribution cabinet, the following five requirements must be observed:

　　1. Selection of Installation Location: During actual installation, if the location of the distribution cabinet is not optimal or does not fully meet the site-specific requirements, the installation team shall promptly submit revision proposals to the design institute. The design party shall then conduct comprehensive planning based on the construction drawings or carry out an on-site survey at the construction site. The final installation location of the distribution cabinet must be determined in a manner that both satisfies practical needs and maintains aesthetic considerations.

　　2. Determining the appropriate installation location based on actual site requirements and specifying the installation height in accordance with relevant standards, as well as securely mounting the distribution cabinet, are fundamental skills that a qualified electrical technician must possess. According to the applicable standards, the bottom edge of the distribution cabinet is generally installed 1.4 meters above the floor; however, the installation height may be adjusted upward or downward as necessary to facilitate operation and maintenance, provided such adjustment has been approved by the design authority.

　　Within the same facility, the installation heights of multiple distribution cabinets over a large area shall be standardized. The cabinets must be installed level, securely fastened, and with deviation from true horizontal not exceeding allowable limits. For surface-mounted distribution cabinets, the connections between incoming and outgoing conduit and the cabinet itself shall be tight, secure, neat, and aesthetically pleasing.

　　3. Conductors shall be connected tightly and securely; the enclosure shall be equipped with safe and reliable neutral-terminal and earth-terminal connections. Within the distribution cabinet, all conductor connections—whether for power supply incoming lines or load outgoing lines—and their connections to electrical components must be tight and secure, with no looseness. The stripped length of conductors shall be appropriate, ensuring that the conductor cores are fully insulated and not exposed; crimping shall be tight and secure. The distribution cabinet shall be provided with complete neutral-terminal connections, and the enclosure must have robust and reliable protective-earth terminal connections.

　　According to the relevant standards, wire connections to electrical components must be fitted with spring washers and securely crimped.

　　4. Wire colors shall be selected in accordance with the relevant standards. When wiring inside a three-phase power distribution cabinet, the incoming power supply conductors, load outgoing conductors, and connection leads for electrical components within the cabinet must all adhere to the prescribed wire-color coding: Phase A shall be yellow, Phase B shall be green, Phase C shall be red, and the neutral conductor shall be light blue or black. The protective earth conductor shall be a yellow-and-green bicolored cable; the use of such bicolored cable as any other type of conductor is strictly prohibited. Connections for incoming and outgoing cables within the cabinet must be executed with precision, and the wiring arrangement must be tightly organized.

　　The wiring for electrical components shall be arranged horizontally and vertically, neatly and aesthetically; at corners, the bending radius shall be no less than six times the outer diameter of the conductor, and any excess length of each set of connection conductors shall be bundled and secured.

　　5. Maintain cleanliness both inside and outside the enclosure, and clearly label the distribution cabinet with its identification number. Upon completion of installation, all debris shall be removed to ensure a clean and tidy environment. The front panel of the distribution cabinet shall be clearly marked with the purpose and identification number of each electrical circuit to facilitate future maintenance.

Space and Height Standards for Data Centers

What precautions should be taken during the installation of data center distribution cabinets?

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