Hi,
I have a 40 year old Square D MCC where the control transformer failed. The 480V fuse block is in front of the transformer. My question is when I shut off the disconnect switch I remove the power to the enclosure but once the fuse block is removed I don't know if the bus is exposed. Also the rest of the MCC is still energized and this switch is on top. Is this a violaton of 70E. I am not comfotable doing this and I am not going to but my supervisor is pushing me to do it. Can anyone shed some light on how 70E covers this type of a situation.
I have a 40 year old Square D MCC where the control transformer failed. The 480V fuse block is in front of the transformer. My question is when I shut off the disconnect switch I remove the power to the enclosure but once the fuse block is removed I don't know if the bus is exposed. Also the rest of the MCC is still energized and this switch is on top. Is this a violaton of 70E. I am not comfotable doing this and I am not going to but my supervisor is pushing me to do it. Can anyone shed some light on how 70E covers this type of a situation.