In which construction sites are mineral-insulated fire-resistant cables used?
Release date:
2022-07-14 13:30
Source:
To better protect the lives and property of the people, the state has successively issued relevant regulations: for residential buildings that are 100 meters tall or taller, or have 35 stories or more, the main power supply lines for fire protection facilities must use Mineral-insulated fire-resistant cable 。
For Class A high-rise residential buildings with heights ranging from 50m to 100m and comprising 19 to 34 floors, the power supply trunk lines for fire protection facilities should use flame-retardant and fire-resistant cables, as well as mineral-insulated fireproof cables.
Simply put, the power supply lines for residential fire protection systems exceeding 100 meters in height or spanning more than 35 floors must use mineral-insulated fire-resistant cables.
For Class 1 high-rise buildings with heights ranging from 50m to 100m and comprising 19 to 34 stories, mineral-insulated fire-resistant cables are recommended—this is merely a suggestion.
In the building fire protection design codes of some regions, relatively detailed explanations are also provided. For instance, civil regulations stipulate that power supply lines for critical fire-fighting equipment—such as fire pumps, fire elevators, and fire fans—in special locations must use insulated fire-resistant cables.
1. The power supply lines for fire hydrant pumps, spray pumps, and water curtain pumps in Class I and Class II public buildings should use mineral-insulated fire-resistant cables and segregated fire-resistant cables. There are several key terms here—specifically "super-high-rise," "Class I," and "Class II" locations. But what exactly do these places refer to? The terms "Special Grade," "Class I," and "Class II" denote different levels of fire protection standards. As for the specific locations, they include ultra-high-rise buildings, hospitals, rail transit systems, airports, commercial complexes, hotels, schools, sports venues, stations, and other areas where large numbers of people gather or where property of significant value is concentrated.
What are the functions and purposes of using mineral-insulated fire-resistant cables in these locations?
Primarily, mineral-insulated fire-resistant cables can only ensure uninterrupted power supply for firefighting during the duration of a fire (over 180 minutes), without any delays, smoke emissions, or secondary hazards. This capability buys invaluable time for fire rescue operations, effectively making these cables a lifeline in the event of a blaze.
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