Chapter 3 — System and site requirements

Page 51 of 332

 

 

Protection

Correct grounding is a necessary component of the protection system for equipment. This grounding includes grounding for outside plant cable shields and protectors, and the grounds for framework, battery, and logic references.

EMC

To make sure that there is good emission and susceptibility performance of the equipment, you must consider the Electromagnetic Compatibility (EMC) grounding requirements.

Installation and Maintenance

A grounding system is cost effective to install and maintain when it is part of the initial electrical installation for the customer’s premises. If you try to correct violations of national codes after the initial installation, it is both difficult and costly.

Powering

The grounding system must consider the power options for the equipment. The grounding system must consider if the equipment is backed up with an Uninterruptible Power Supply (UPS). Consider the grounding and powering of all equipment that is part of the telecommunications system as one large system. Perform the installation taking this information into consideration.

Advances in Technology

The component density on circuit cards continues to increase because of the miniaturization and multi-layering of printed circuit boards. The operating speeds of the integrated circuits are ever increasing. Grounding provides protection for these components, and is very important.

The SPG of a system is the point at which telecommunications equipment bonds to the ground. A copper busbar normally acts as the system SPG.

Option 11C Mini Planning and Installation Guide

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Nortel Networks Option 11C Mini manual Emc