Safety in circuit disconnects!
When trying to open a particular circuit disconnecting device, always make sure that the downstream loads are not in operation. This would ensure that current flow to the load end is not taking place, and severe arching is avoided. Note that this is especially true when the downstream loads draw large currents, and the circuit disconnect is an ordinary knife switch..
Written by: Sanoy Suerte, RME/MBM; http://www.linkedin.com/in/sannysuerte
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