Foong K Pui-tse, Watson A, Avolio A
Graduate School of Biomedical Engineering, University of New South Wales, Sydney, Australia.
Australas Phys Eng Sci Med. 2004 Sep;27(3):151-4. doi: 10.1007/BF03178675.
This study was undertaken to determine the ongoing need for Equipotential (EP) earthing as required in AS/NZS 3003, section 4.4.2. A total of 2279 earth points were tested in four clinical institutions in Body Protected areas (as defined in AS/NZS 3003). Each earth point was tested for potentials existing in the earthing in order to assess whether any potentials exceeded the 100 mV requirement of AS/NZS 3003 for EP earthing. The voltage measured was 1.21 mV +/- 3.59 mV, (mean +/- standard deviation (SD)), with a of 99 % confidence interval between 1.0 mV and 1.4 mV. This study suggests that the requirements for EP earthing in section 4.4.2 of AS/NZS 3003 are unnecessary. It is further suggested that Standards Australia review these requirements with the view of withdrawing them from the Standard.
本研究旨在确定是否仍需按照AS/NZS 3003第4.4.2节的要求进行等电位（EP）接地。在人体保护区的四个临床机构（如AS/NZS 3003中所定义）共测试了2279个接地点。对每个接地点的接地电位进行测试，以评估是否有任何电位超过AS/NZS 3003对EP接地规定的100 mV要求。测得的电压为1.21 mV +/- 3.59 mV（平均值 +/- 标准差（SD）），99%置信区间在1.0 mV至1.4 mV之间。本研究表明，AS/NZS 3003第4.4.2节中对EP接地的要求是不必要的。进一步建议澳大利亚标准协会审查这些要求，以便将其从标准中删除。
