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X6800 Server V100R003 User Guide 13

This document describes the Huawei X6800 server (X6000 for short) in terms of its appearance, features, specifications, system components, device installation, cable connections, and installation verification.
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Laying Out Cables

Laying Out Cables

This topic describes how to lay out the power cables and data cables at the rear of the chassis.

Basic Rules

  • Different types of cables such as power cables, signal cables, and ground cables must be laid out and bound separately. Cables of the same type are laid out in the same direction. Cables at a small distance can be laid out in crossover mode. When laying out cables in parallel, the distance between power cables and signal cables must be longer than or equal to 30 mm (1.18 in.).
  • If cables cannot be identified by labels, attach engineering labels to distinguish different types of cables.
  • Cables must be protected from burrs, heat sinks, and active accessories, which may damage the insulation layers of the cables.
  • Cable ties are used for binding cables. Do not tie two or more cable ties together for binding cables. After cables are bound using cable ties, cut off the excess part and ensure that the cuts are neat and smooth.
  • Cables must be properly laid out, supported, or fixed in cable troughs inside a rack. This is to prevent excessive stress on the cables or wiring terminals, loose connections, and damage to the cable insulation layer.
  • Surplus parts of cables are coiled and bound in a proper position of the rack.
  • Cables are routed straightly and bound neatly in a rack. The bending radius of a cable varies according to the bending position.
    • If you need to bend a cable in the middle, the bending radius must be at least twice the cable diameter.
    • If you want to bend a cable at the output terminal of a connector, the bending radius must be at least five times the cable diameter, and the cable must be bound before it is bent.
    • Do not use cable ties at positions where the cables are bent. Otherwise, the core wires of the cables may break.

Common Methods

The methods of laying out cables inside a rack are described as follows:

  • Lay out power cables at the rear of the rack along the left side. Choose overhead or underfloor cabling based on equipment room conditions, such as the positions of the AC power distribution cabinet, surge protection device (SPD), and terminal block.
  • Route service data cables at the rear of the rack and bind them to the right cable trough, or route them at the front of the rack and bind them to the cable troughs on both sides. Choose overhead or underfloor cabling for service data cables based on equipment room conditions, for example, the cabling mode (overhead or underfloor cabling) used by signal cables.
  • Place the connectors of all service data cables at the bottom of the rack in order so that the connectors cannot be easily reached.
  • Ensure that high-density cables are not routed in crossover mode. This helps identify connectors and remove and install server nodes.

Cable Layout Scheme

Figure 3-27 shows the cable layout scheme for the server with a CMA.

NOTICE:

Do not block the air exhaust vents of fan modules and PSU fans. Otherwise, the server cannot be cooled properly.

Figure 3-27 Cable layout scheme

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Updated: 2018-09-06

Document ID: EDOC1000066339

Views: 30030

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