摘要
此类支架型接头盒包括所有放在支架上的接头盒.支架接头盒的技术要求低于地下接头盒.它必须符合抗御3m深水浸的标准,因为这些接头盒的高度与地平线同高,而且支架也并不一定具有防水功能.Bellcore GR-771标准允许支架式接头盒透气或密封.因此,GR-771支架式接头盒额定指标显然不能满足防洪要求.由于这些接头盒是靠支架保护的,故对防撞击、防压和防腐蚀的要求不高.Bellcore不要求对支架型接头盒做防冻、解冻试验.
This pedestal group includes any closure that will be placed above grade in a pedestal type enclosure. Pedestal closures are designed to meet specificaions lower than those for underground. A 10-foot water immersion resistance specification is necessary, because these closures are placed at ground level, and the pedestal will not always be floodproof. Bellcore GR-771 allows pedestahype closures to be free breathing or sealed. Therefore,
出处
《有线电视技术》
2005年第16期109-109,共1页
Cable TV Technology
