欧洲自拍另类欧美综合图片区,国产精品无码一区二区三区不卡免费,久久久久久亚洲精品乱码蜜桃不卡,久久婷婷丁香五月天

1. The intensive cable

More intensive configuration cable of flame retardant, should press "into a bundle of wire and cable fire test method", and the cable is configured, needed to prevent catastrophic accidents and economic and reasonable principle, satisfies the requirement of suitable category.

In an external fire time domestic demand to maintain current loop and the following, Ming fu cable fire protection should be implemented or choose has the fire resistance of the cable. Such as fire, police, emergency lighting, dc power supply for the operation of breaking device and the power to save the generator emergency stop and other important loop; Computer monitoring, double double circuit relay protection, security etc and share the same channel is not isolated in one of the circuits.

2. The cable fire protection

Cable quantity is small, fire retardant coating available, package is added on the cable or cable to wear in the fire pipe. Cable is large, the same channel should be equipped in the fireproof trough box, and the power cable should be used ventilation type, in the absence of combustible dust environment available semi-closed, laying in the cable protection section of bridge rack is not long, also can use fire.

In oil tank area, important timberwork public buildings, and other high temperature places require high fire-resistant and installing and laying, the situation of economic performance to accept incombustible mineral insulated cable can be used. The oil-filled cable after Ming fu in the public corridor, the passenger tunnel, bridge for implementation of the fire prevention, can take sand buried laying. Near the high pressure oil equipment such as current, voltage transformer in cable trench, appropriate makes the segment trench cover seal.

3. The populated places

In the security requirements of high cable populated places or closed channels, shall be provided with suitable for environment and reliable action of the automatic fire detection alarm device. Ming fu oil-filled cable oil supply system should be equipped with fire auto alarm and can reflect the state of the injection locking device. Underground cable densely populated parts of the public facilities, and more back into oil-filled cable terminal Settings and places of security requirement is higher, can be installed special fire control facilities such as water spray extinguishing the fire.