Allen Bradley
Member
- Location
- Just east of Insanity
- Occupation
- Electrical Controls Guy
So, I happened to discover that the same guys that wanted to run a 350HP motor from two separate 400A disconnects had previously put 600A fuses in one of the 400A disconnects. https://forums.mikeholt.com/threads/powering-a-motor-from-two-separate-disconnects.2580335/
Notice how the long blades of the short fuses hang out of the clips at the bottom. Leave it to mechanical engineers to figure out a way to make electrical things unsafe.
Additionally, the conductors are only 500MCM. Which would be ok if the maximum load was less than 380A, even with 400A fuses, but if the intention is to utilize the full 400A rating of the disconnect, we would need 600MCM conductors, correct?
Notice how the long blades of the short fuses hang out of the clips at the bottom. Leave it to mechanical engineers to figure out a way to make electrical things unsafe.
Additionally, the conductors are only 500MCM. Which would be ok if the maximum load was less than 380A, even with 400A fuses, but if the intention is to utilize the full 400A rating of the disconnect, we would need 600MCM conductors, correct?
