How to choose MTP/MPO Cable Polarity?

1. When purchasing MTP/MPO cables online, it is important to consider not only the fiber type and fiber count but also the outer jacket of the cable. The outer jacket plays a crucial role in protecting the cable from damage. There are different types of outer jackets available, such as CMP, LSZH, CMR, and CM, each suitable for different cabling environments. Understanding the characteristics of these jackets is essential when buying MTP/MPO cables.

2. CMP (plenum-rated) cable is designed to comply with the IEC 60332-1 flammability standard. It undergoes rigorous burn testing and is suitable for installation in air plenum spaces, where environmental air is transported. Plenum spaces are typically found between the structural ceiling and the drop ceiling or under a raised floor. CMP cables are designed to restrict flame propagation and limit the amount of smoke emitted during a fire. However, it is important to note that high-voltage equipment is not allowed in plenum spaces due to the increased risk of flame spreading.

3. LSZH (low smoke zero halogen) cables, on the other hand, comply with the IEC 60754 and IEC 61034 standards. These cables are known for their low toxicity and minimal smoke emission when exposed to flame. LSZH cables do not contain halogen compounds that produce toxic substances and do not release dangerous gas or acid combinations when burned. They are suitable for use in areas with poor air circulation. It is important to consider the specific requirements of your cabling environment when choosing between CMP and LSZH cables to ensure the safety and efficiency of your network deployment.