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Electrical question No.34 - AC or DC hazardous current
Author : akbari nejad - From: IRAN
Tue, March 17, 2009 - 19:07
There shall be a 300-V limitation on all operating control and signal circuits and related equipment,including door operators. Exceptions are permitted for 25 to 60 Hz ac if the current cannot under any conditions exceed 8 mA, or for dc voltage if the current cannot, under any circumstances, exceed 30 mA.
Author : Hamid - From: IRAN
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