主题:住宅旁的高压线对住户有什么影响? -- zhydrag
自控(继电控制除外)、通讯、计算机、电子行业等算弱电,虽然这些东西里面也有220V甚至上万V的电。
强电主要处理危险电压,弱电主要处理安全电压。弱电电流也小多了,几A算是大电流了。
当然这个区分是相对的,如果只在电工这个范围内内分,最终用户的400V以下也可能算弱电了。
全世界那么多电工和接触电的其他工种。
主要结论是50/60Hz的电磁场是可能的致癌因素,在“可能”,“可以”,“是”,这3个致癌因素级别里最低。
家具厂天天在做,用这个家具就是安全的;满街的人都吃了地沟油,这个东西吃了就没事。
保护自己和家人避免潜在的危险,可能是现代人不被专家们信誓旦旦中的口水淹死的最好选择。
没有确切证据证明暴露在低频场中会导致包括DNA在内的生物分子的直接伤害.因此不太可能致癌.然而,关于低频场是否会影响癌症发病率的提高仍然在研究中.最近的动物实验没有发现低频场影响癌症的证据.
你说的"主要结论"是引用了NIEHS的结论.
"Possible human carcinogen" is the weakest of three categories ("possibly carcinogenic to humans", "probably carcinogenic to humans" and "is carcinogenic to humans") used by IARC to classify scientific evidence on potential carcinogens. IARC has two further classifications of scientific evidence: "is not classifiable" and "is probably not carcinogenic to humans", but the NIEHS Working Group considered there was enough evidence to eliminate these categories.
"Possible human carcinogen" is a classification used to denote an agent for which there is limited evidence of carcinogenicity in humans and less than sufficient evidence for carcinogenicity in experimental animals. Thus the classification is based on the strength of scientific evidence, not on the strength of carcinogenicity or risk of cancer from the agent. Thus, "possible human carcinogen" means limited credible evidence exists suggesting that exposure to ELF fields may cause cancer. While it cannot be excluded that ELF field exposure causes cancer from available evidence, further focused, high quality research is now needed to resolve this issue.
The decision of the NIEHS Working Group was based mainly on the appearance of consistency in epidemiological studies suggesting residence near power lines resulted in an apparently higher risk of leukaemia in children. Support for this association was found in studies relating childhood leukaemia incidence to proximity to power lines and to magnetic fields measured for 24 hours in homes. Furthermore, the Working Group also found limited evidence for an increased occurrence of chronic lymphocytic leukaemia in the occupational setting.
很长,不翻了.
大意是,美国人的研究认为50/60Hz的电磁场是可能的致癌因素.但"可能"仅仅是不能排除的意思.
而且,这个研究的证据来源是输电线路(不是家庭线路)附近住家儿童白血病发病之间的相关性.在职业工作人员(我猜是电路工作人员)对照组中仅有有限的证据( limited evidence )证明慢性淋巴白血病发病率的提高.
WHO认可的结论是
不需要任何特殊防护,有高强度低频场的场所是有护栏保护的,普通人无法接近,也不需要特殊防护.
不然无线供电技术早就能解决了,还用费这么多牛劲去研究么。
不能在城里住,离任何电线都远远的,可惜这样的地方难找。